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Dong W, Zhou J, Zhang CJ, Yang Q, Li M. Methylotrophic substrates stimulated higher methane production than competitive substrates in mangrove sediments. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 951:175677. [PMID: 39181265 DOI: 10.1016/j.scitotenv.2024.175677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2024] [Revised: 08/09/2024] [Accepted: 08/19/2024] [Indexed: 08/27/2024]
Abstract
Although mangrove forests can uptake atmospheric CO2 and store carbon as organic matter called "blue carbon", it is also an important natural source of greenhouse gas methane. Methanogens are major contributors to methane and play important roles in the global carbon cycle. However, our understanding of the key microbes and metabolic pathways responsible for methanogenesis under specific substrates in mangrove sediments is still very limited. Here, we set an anaerobic incubation to evaluate the responses of methanogens in mangrove sediments from South China to the addition of diverse methanogenic substrates (H2/CO2, acetate, trimethylamine (TMA), and methanethiol (MT)) and further investigated the dynamics of the whole microbial community. Our results showed that diverse substrates stimulated methanogenic activities at different times. The stimulation of methanogenesis was more pronounced at early and late periods by the addition of methylotrophic substrates TMA and MT, respectively. The amplicon sequencing analysis showed that genus Methanococcoides was mainly responsible for TMA-utilized methanogenesis in mangrove sediment, while the multitrophic Methanococcus was most abundant in H2/CO2 and MT treatments. Apart from that, the bacteria enrichments of Syntrophotalea, Clostridium_sensu_stricto_12, Fusibacter in MT treatments might also be associated with the stimulation of methane production. In addition, the metagenomic analysis suggested that Methanosarcinaceae was also one of the key methanogens in MT treatments with different genomic information compared to that in TMA treatments. Finally, the total relative abundances of methanogenesis-related genes were also highest in TMA and MT treatments. These results will help advance our understanding of the contributions of different methanogenesis pathways and methanogens to methane emissions in mangrove sediments.
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Affiliation(s)
- Weiling Dong
- Archaeal Biology Center, Synthetic Biology Research Center, Shenzhen Key Laboratory of Marine Microbiome Engineering, Key Laboratory of Marine Microbiome Engineering of Guangdong Higher Education Institutes, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Jinjie Zhou
- Archaeal Biology Center, Synthetic Biology Research Center, Shenzhen Key Laboratory of Marine Microbiome Engineering, Key Laboratory of Marine Microbiome Engineering of Guangdong Higher Education Institutes, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Cui-Jing Zhang
- Archaeal Biology Center, Synthetic Biology Research Center, Shenzhen Key Laboratory of Marine Microbiome Engineering, Key Laboratory of Marine Microbiome Engineering of Guangdong Higher Education Institutes, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Qin Yang
- Department of Biological Information, Shenzhen GenDow Biotech Co., Ltd., Shenzhen, Guangdong, China
| | - Meng Li
- Archaeal Biology Center, Synthetic Biology Research Center, Shenzhen Key Laboratory of Marine Microbiome Engineering, Key Laboratory of Marine Microbiome Engineering of Guangdong Higher Education Institutes, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China.
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2
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Su G, Guo Z, Hu Y, Zheng Q, Zopfi J, Lehmann MF, Jiao N. Tidal control on aerobic methane oxidation and mitigation of methane emissions from coastal mangrove sediments. ENVIRONMENTAL RESEARCH 2024:120049. [PMID: 39322055 DOI: 10.1016/j.envres.2024.120049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2024] [Revised: 09/20/2024] [Accepted: 09/21/2024] [Indexed: 09/27/2024]
Abstract
Mangrove forests represent important sources of methane, partly thwarting their ecosystem function as efficient atmospheric carbon dioxide sink. Many studies have focused on the spatial and temporal variability of methane emissions from mangrove ecosystems, yet little is known about the microbial and physical controls on the release of biogenic methane from tidally influenced mangrove sediments. Here, we show that aerobic methane oxidation is a key microbial process that effectively reduces methane emissions from mangrove sediments. We further demonstrate clear links between the tidal cycle and fluctuations in methane fluxes, with contrasting methane emission rates under different tidal amplitudes. Our data suggest that both the microbial methane oxidation activity and pressure-induced advective transport modulated methane fluxes in the mangrove sediments. Methane oxidation activity is limited by the availability of oxygen in the surface sediments, which in turn is controlled by tidal dynamics, further highlighting the interactive physico-biogeochemical controls on biological methane fluxes. Although we found some molecular evidence for anaerobic methanotrophs in the deeper sediments, anaerobic methane oxidation seems to play only a minor role in the mangrove sediments, with potential rates being two orders of magnitude lower than those of aerobic methane oxidation. Our findings confirmed the importance of surface sediments as biological barrier for methane. Specifically, when sediments were exposed to the air, methane consumption increased by ∼227%, and the methane flux was reduced by ∼62%, compared to inundated conditions. Our data demonstrate how tides can orchestrate the daily rhythm of methane consumption and production within mangrove sediments, thus explaining the temporal variability of methane emissions in the tidally influenced coastal mangrove systems.
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Affiliation(s)
- Guangyi Su
- Carbon Neutral Innovation Research Center, Xiamen University, Xiamen, China; State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China.
| | - Zhenli Guo
- Carbon Neutral Innovation Research Center, Xiamen University, Xiamen, China; State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Yuxing Hu
- Carbon Neutral Innovation Research Center, Xiamen University, Xiamen, China; State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Qiang Zheng
- Carbon Neutral Innovation Research Center, Xiamen University, Xiamen, China; State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Jakob Zopfi
- Department of Environmental Sciences, University of Basel, Basel, Switzerland
| | - Moritz F Lehmann
- Department of Environmental Sciences, University of Basel, Basel, Switzerland
| | - Nianzhi Jiao
- Carbon Neutral Innovation Research Center, Xiamen University, Xiamen, China; State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China.
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3
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Qian L, Yan B, Zhou J, Fan Y, Tao M, Zhu W, Wang C, Tu Q, Tian Y, He Q, Wu K, Niu M, Yan Q, Nikoloski Z, Liu G, Yu X, He Z. Comprehensive profiles of sulfur cycling microbial communities along a mangrove sediment depth. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 944:173961. [PMID: 38876338 DOI: 10.1016/j.scitotenv.2024.173961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2024] [Revised: 05/30/2024] [Accepted: 06/11/2024] [Indexed: 06/16/2024]
Abstract
The sulfur (S) cycle is an important biogeochemical cycle with profound implications for both cellular- and ecosystem-level processes by diverse microorganisms. Mangrove sediments are a hotspot of biogeochemical cycling, especially for the S cycle with high concentrations of S compounds. Previous studies have mainly focused on some specific inorganic S cycling processes without paying specific attention to the overall S-cycling communities and processes as well as organic S metabolism. In this study, we comprehensively analyzed the distribution, ecological network and assembly mechanisms of S cycling microbial communities and their changes with sediment depths using metagenome sequencing data. The results showed that the abundance of gene families involved in sulfur oxidation, assimilatory sulfate reduction, and dimethylsulfoniopropionate (DMSP) cleavage and demethylation decreased with sediment depths, while those involved in S reduction and dimethyl sulfide (DMS) transformation showed an opposite trend. Specifically, glpE, responsible for converting S2O32- to SO32-, showed the highest abundance in the surface sediment and decreased with sediment depths; in contrast, high abundances of dmsA, responsible for converting dimethyl sulfoxide (DMSO) to DMS, were identified and increased with sediment depths. We identified Pseudomonas and Streptomyces as the main S-cycling microorganisms, while Thermococcus could play an import role in microbial network connections in the S-cycling microbial community. Our statistical analysis showed that both taxonomical and functional compositions were generally shaped by stochastic processes, while the functional composition of organic S metabolism showed a transition from stochastic to deterministic processes. This study provides a novel perspective of diversity distribution of S-cycling functions and taxa as well as their potential assembly mechanisms, which has important implications for maintaining mangrove ecosystem functions.
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Affiliation(s)
- Lu Qian
- School of Environmental Science and Engineering, Marine Synthetic Ecology Research Center, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), State Key Laboratory of Biocontrol, Sun Yat-Sen University, Guangzhou 510006, China
| | - Bozhi Yan
- School of Environmental Science and Engineering, Marine Synthetic Ecology Research Center, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), State Key Laboratory of Biocontrol, Sun Yat-Sen University, Guangzhou 510006, China
| | - Jiayin Zhou
- Institute of Marine Science and Technology, Shandong University, Qingdao 266237, China
| | - Yijun Fan
- School of Environmental Science and Engineering, Marine Synthetic Ecology Research Center, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), State Key Laboratory of Biocontrol, Sun Yat-Sen University, Guangzhou 510006, China
| | - Mei Tao
- School of Environmental Science and Engineering, Marine Synthetic Ecology Research Center, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), State Key Laboratory of Biocontrol, Sun Yat-Sen University, Guangzhou 510006, China; College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Wengen Zhu
- School of Environmental Science and Engineering, Marine Synthetic Ecology Research Center, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), State Key Laboratory of Biocontrol, Sun Yat-Sen University, Guangzhou 510006, China
| | - Cheng Wang
- School of Environmental Science and Engineering, Marine Synthetic Ecology Research Center, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), State Key Laboratory of Biocontrol, Sun Yat-Sen University, Guangzhou 510006, China
| | - Qichao Tu
- Institute of Marine Science and Technology, Shandong University, Qingdao 266237, China
| | - Yun Tian
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China
| | - Qiang He
- Department of Civil and Environmental Engineering, The University of Tennessee, Knoxville, TN 37996, USA
| | - Kun Wu
- School of Environmental Science and Engineering, Marine Synthetic Ecology Research Center, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), State Key Laboratory of Biocontrol, Sun Yat-Sen University, Guangzhou 510006, China
| | - Mingyang Niu
- School of Environmental Science and Engineering, Marine Synthetic Ecology Research Center, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), State Key Laboratory of Biocontrol, Sun Yat-Sen University, Guangzhou 510006, China
| | - Qingyun Yan
- School of Environmental Science and Engineering, Marine Synthetic Ecology Research Center, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), State Key Laboratory of Biocontrol, Sun Yat-Sen University, Guangzhou 510006, China
| | - Zoran Nikoloski
- Bioinformatics, Institute of Biochemistry and Biology, University of Potsdam, Potsdam 14476, Germany; Systems Biology and Mathematical Modeling, Max Planck Institute of Molecular Plant Physiology, Potsdam 14476, Germany
| | - Guangli Liu
- School of Environmental Science and Engineering, Marine Synthetic Ecology Research Center, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), State Key Laboratory of Biocontrol, Sun Yat-Sen University, Guangzhou 510006, China.
| | - Xiaoli Yu
- School of Environmental Science and Engineering, Marine Synthetic Ecology Research Center, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), State Key Laboratory of Biocontrol, Sun Yat-Sen University, Guangzhou 510006, China.
| | - Zhili He
- School of Environmental Science and Engineering, Marine Synthetic Ecology Research Center, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), State Key Laboratory of Biocontrol, Sun Yat-Sen University, Guangzhou 510006, China.
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4
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Hu R, He Z, Wang C. Rethinking microbially driven methane formation in mangrove wetlands. Trends Microbiol 2024; 32:832-835. [PMID: 38897853 DOI: 10.1016/j.tim.2024.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2024] [Revised: 06/05/2024] [Accepted: 06/05/2024] [Indexed: 06/21/2024]
Abstract
Mangrove wetlands contribute to climate change mitigation through efficient carbon burial, yet microbial methanogenesis offsets these climate benefits. We review the diversity of methanogenic microorganisms in mangrove sediments, present the unrecognized role of bacteria on methanogenesis, and highlight the significance of distinguishing various methanogenic pathways to assess mangrove climate benefits.
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Affiliation(s)
- Ruiwen Hu
- School of Environmental Science and Engineering, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-sen University, Guangzhou 510006, China; Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Zhili He
- School of Environmental Science and Engineering, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-sen University, Guangzhou 510006, China
| | - Cheng Wang
- School of Environmental Science and Engineering, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-sen University, Guangzhou 510006, China.
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5
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Arias-Ortiz A, Wolfe J, Bridgham SD, Knox S, McNicol G, Needelman BA, Shahan J, Stuart-Haëntjens EJ, Windham-Myers L, Oikawa PY, Baldocchi DD, Caplan JS, Capooci M, Czapla KM, Derby RK, Diefenderfer HL, Forbrich I, Groseclose G, Keller JK, Kelley C, Keshta AE, Kleiner HS, Krauss KW, Lane RR, Mack S, Moseman-Valtierra S, Mozdzer TJ, Mueller P, Neubauer SC, Noyce G, Schäfer KVR, Sanders-DeMott R, Schutte CA, Vargas R, Weston NB, Wilson B, Megonigal JP, Holmquist JR. Methane fluxes in tidal marshes of the conterminous United States. GLOBAL CHANGE BIOLOGY 2024; 30:e17462. [PMID: 39234688 DOI: 10.1111/gcb.17462] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 07/12/2024] [Indexed: 09/06/2024]
Abstract
Methane (CH4) is a potent greenhouse gas (GHG) with atmospheric concentrations that have nearly tripled since pre-industrial times. Wetlands account for a large share of global CH4 emissions, yet the magnitude and factors controlling CH4 fluxes in tidal wetlands remain uncertain. We synthesized CH4 flux data from 100 chamber and 9 eddy covariance (EC) sites across tidal marshes in the conterminous United States to assess controlling factors and improve predictions of CH4 emissions. This effort included creating an open-source database of chamber-based GHG fluxes (https://doi.org/10.25573/serc.14227085). Annual fluxes across chamber and EC sites averaged 26 ± 53 g CH4 m-2 year-1, with a median of 3.9 g CH4 m-2 year-1, and only 25% of sites exceeding 18 g CH4 m-2 year-1. The highest fluxes were observed at fresh-oligohaline sites with daily maximum temperature normals (MATmax) above 25.6°C. These were followed by frequently inundated low and mid-fresh-oligohaline marshes with MATmax ≤25.6°C, and mesohaline sites with MATmax >19°C. Quantile regressions of paired chamber CH4 flux and porewater biogeochemistry revealed that the 90th percentile of fluxes fell below 5 ± 3 nmol m-2 s-1 at sulfate concentrations >4.7 ± 0.6 mM, porewater salinity >21 ± 2 psu, or surface water salinity >15 ± 3 psu. Across sites, salinity was the dominant predictor of annual CH4 fluxes, while within sites, temperature, gross primary productivity (GPP), and tidal height controlled variability at diel and seasonal scales. At the diel scale, GPP preceded temperature in importance for predicting CH4 flux changes, while the opposite was observed at the seasonal scale. Water levels influenced the timing and pathway of diel CH4 fluxes, with pulsed releases of stored CH4 at low to rising tide. This study provides data and methods to improve tidal marsh CH4 emission estimates, support blue carbon assessments, and refine national and global GHG inventories.
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Affiliation(s)
- Ariane Arias-Ortiz
- Physics Department, Universitat Autònoma de Barcelona, Barcelona, Spain
- Ecosystem Science Division, Department of Environmental Science, Policy and Management, University of California, Berkeley, California, USA
| | - Jaxine Wolfe
- Smithsonian Environmental Research Center, Edgewater, Maryland, USA
| | - Scott D Bridgham
- Institute of Ecology and Evolution, University of Oregon, Eugene, Oregon, USA
| | - Sara Knox
- Department of Geography, The University of British Columbia, Vancouver, British Columbia, Canada
- Department of Geography, McGill University, Montreal, Quebec, Canada
| | - Gavin McNicol
- Department of Earth and Environmental Sciences, University of Illinois Chicago, Chicago, Illinois, USA
| | - Brian A Needelman
- Department of Environmental Science and Technology, University of Maryland, College Park, Maryland, USA
| | - Julie Shahan
- Earth System Science, Stanford University, Stanford, California, USA
| | | | | | - Patty Y Oikawa
- Department of Earth and Environmental Sciences, California State University, East Bay, Hayward, California, USA
| | - Dennis D Baldocchi
- Ecosystem Science Division, Department of Environmental Science, Policy and Management, University of California, Berkeley, California, USA
| | - Joshua S Caplan
- Department of Architecture & Environmental Design, Temple University, Ambler, Pennsylvania, USA
| | - Margaret Capooci
- Department of Plant & Soil Sciences, University of Delaware, Newark, Delaware, USA
| | - Kenneth M Czapla
- Department of Environmental Sciences, University of California Riverside, Riverside, California, USA
| | - R Kyle Derby
- Maryland Department of Natural Resources, Chesapeake Bay National Estuarine Research Reserve, Annapolis, Maryland, USA
| | - Heida L Diefenderfer
- Coastal Sciences Division, Pacific Northwest National Laboratory, Sequim, Washington, USA
| | - Inke Forbrich
- Ecosystems Center, Marine Biological Laboratory, Woods Hole, Massachusetts, USA
- Department of Environmental Sciences, University of Toledo, Toledo, Ohio, USA
| | - Gina Groseclose
- Department of Oceanography and Coastal Sciences, Louisiana State University, Baton Rouge, Louisiana, USA
| | - Jason K Keller
- Schmid College of Science and Technology, Chapman University, Orange, California, USA
- Kravis Department of Integrated Sciences, Claremont McKenna College, Claremont, California, USA
| | - Cheryl Kelley
- Department of Geological Sciences, University of Missouri, Columbia, Missouri, USA
| | - Amr E Keshta
- Botany Department, Faculty of Science, Tanta University, Tanta, Egypt
- Department of Environmental Science and Technology, University of Maryland, College Park, Maryland, USA
| | - Helena S Kleiner
- Smithsonian Environmental Research Center, Edgewater, Maryland, USA
| | - Ken W Krauss
- U.S. Geological Survey, Wetland and Aquatic Research Center, Lafayette, Louisiana, USA
| | | | - Sarah Mack
- Tierra Resources LLC, Lafitte, Louisiana, USA
| | | | - Thomas J Mozdzer
- Bryn Mawr College, Department of Biology, Bryn Mawr, Pennsylvania, USA
| | - Peter Mueller
- Institute of Landscape Ecology, University of Münster, Münster, Germany
| | - Scott C Neubauer
- Department of Biology, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Genevieve Noyce
- Smithsonian Environmental Research Center, Edgewater, Maryland, USA
| | - Karina V R Schäfer
- Earth and Environmental Science Dept, Rutgers University Newark, Newark, New Jersey, USA
| | - Rebecca Sanders-DeMott
- U.S. Geological Survey, Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts, USA
| | - Charles A Schutte
- Department of Environmental Science, Rowan University, Glassboro, New Jersey, USA
| | - Rodrigo Vargas
- Department of Plant & Soil Sciences, University of Delaware, Newark, Delaware, USA
| | - Nathaniel B Weston
- Department of Geography and the Environment, Villanova University, Villanova, Pennsylvania, USA
| | - Benjamin Wilson
- Department of Biological Sciences, Florida International University, Miami, Florida, USA
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Wang Q, Zheng G, Ni L, Wang H, Li W, Guo P, Wang Y, Zheng D, Wu J, Zhang D. Colonization characteristics and dynamic transition of archaea communities on polyethylene and polypropylene microplastics in the sediments of mangrove ecosystems. JOURNAL OF HAZARDOUS MATERIALS 2024; 471:134343. [PMID: 38640671 DOI: 10.1016/j.jhazmat.2024.134343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 02/28/2024] [Accepted: 04/16/2024] [Indexed: 04/21/2024]
Abstract
Microplastics are a growing concern in mangrove ecosystems; however, their effects on archaeal communities and related ecological processes remain unclear. We conducted in situ biofilm-enrichment experiments to investigate the ecological influence of polyethylene (PE) and polypropylene microplastics on archaeal communities in the sediments of mangrove ecosystems. The archaeal community present on microplastics was distinct from that of the surrounding sediments at an early stage but became increasingly similar over time. Bathyarchaeota, Thaumarchaeota, Euryarchaeota, and Asgardaeota were the most abundant phyla. Methanolobus, an archaeal biomarker, was enriched in PE biofilms, and significantly controlled by homogeneous selection in the plastisphere, indicating an increased potential risk of methane emission. The dominant archaeal assembly process in the sediments was deterministic (58.85%-70.47%), while that of the PE biofilm changed from stochastic to deterministic during the experiment. The network of PE plastispheres showed less complexity and competitive links, and higher modularity and stability than that of sediments. Functional prediction showed an increase in aerobic ammonia oxidation during the experiment, whereas methanogenesis and chemoheterotrophy were significantly higher in the plastisphere. This study provides novel insights into the impact of microplastic pollution on archaeal communities and their mediating ecological functions in mangrove ecosystems.
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Affiliation(s)
- Qiong Wang
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, Zhejiang, China; Donghai Laboratory, Zhoushan 316021, Zhejiang, China; Institute of Agricultural Products Processing and Nuclear Agriculture Technology Research, Hubei Academy of Agricultural Sciences, Wuhan 430064, Hubei, China
| | - Gang Zheng
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, Zhejiang, China; Xianghu Laboratory, Hangzhou 311231, Zhejiang, China
| | - Lingfang Ni
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, Zhejiang, China
| | - Heng Wang
- Key Laboratory of Health Risk Factors for Seafood of Zhejiang Province, Zhoushan 316021, Zhejiang, China
| | - Weiye Li
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, Zhejiang, China
| | - Peng Guo
- Institute of Agricultural Products Processing and Nuclear Agriculture Technology Research, Hubei Academy of Agricultural Sciences, Wuhan 430064, Hubei, China
| | - Yi Wang
- Institute of Agricultural Products Processing and Nuclear Agriculture Technology Research, Hubei Academy of Agricultural Sciences, Wuhan 430064, Hubei, China
| | - Daoqiong Zheng
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, Zhejiang, China; Donghai Laboratory, Zhoushan 316021, Zhejiang, China
| | - Jiaping Wu
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, Zhejiang, China
| | - Dongdong Zhang
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, Zhejiang, China; Donghai Laboratory, Zhoushan 316021, Zhejiang, China; Key Laboratory of Health Risk Factors for Seafood of Zhejiang Province, Zhoushan 316021, Zhejiang, China.
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7
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Arifanti VB, Candra RA, Putra CAS, Asyhari A, Gangga A, Ritonga RP, Ilman M, Anggoro AW, Novita N. Greenhouse gas fluxes of different land uses in mangrove ecosystem of East Kalimantan, Indonesia. CARBON BALANCE AND MANAGEMENT 2024; 19:17. [PMID: 38824211 PMCID: PMC11144335 DOI: 10.1186/s13021-024-00263-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Accepted: 05/23/2024] [Indexed: 06/03/2024]
Abstract
BACKGROUND Mangrove ecosystems exhibit significant carbon storage and sequestration. Its capacity to store and sequester significant amounts of carbon makes this ecosystem very important for climate change mitigation. Indonesia, owing to the largest mangrove cover in the world, has approximately 3.14 PgC stored in the mangroves, or about 33% of all carbon stored in coastal ecosystems globally. Unfortunately, our comprehensive understanding of carbon flux is hampered by the incomplete repertoire of field measurement data, especially from mangrove ecosystem-rich regions such as Indonesia and Asia Pacific. This study fills the gap in greenhouse gases (GHGs) flux studies in mangrove ecosystems in Indonesia by quantifying the soil CO2 and CH4 fluxes for different land use types in mangrove ecosystems, i.e., secondary mangrove (SM), restored mangrove (RM), pond embankment (PE) and active aquaculture pond (AP). Environmental parameters such as soil pore salinity, soil pore water pH, soil temperature, air temperature, air humidity and rainfall are also measured. RESULTS GHG fluxes characteristics varied between land use types and ecological conditions. Secondary mangrove and exposed pond embankment are potential GHG flux sources (68.9 ± 7.0 and 58.5 ± 6.2 MgCO2e ha- 1 yr- 1, respectively). Aquaculture pond exhibits the lowest GHG fluxes among other land use types due to constant inundation that serve as a barrier for the release of GHG fluxes to the atmosphere. We found weak relationships between soil CO2 and CH4 fluxes and environmental parameters. CONCLUSIONS The data and information on GHG fluxes from different land use types in the mangrove ecosystem will be of importance to accurately assess the potential of the mangrove ecosystem to sequester and emit GHGs. This will support the GHG emission reduction target and strategy that had been set up by the Indonesian Government in its Nationally Determined Contributions (NDC) and Indonesia's 2030 Forest and Other Land Use (FOLU) Net Sink.
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Affiliation(s)
- Virni Budi Arifanti
- Research Center for Ecology and Ethnobiology, National Research & Innovation Agency of Indonesia (BRIN), Jl. Raya Jakarta Bogor km 46, Cibinong, Bogor, 16911, Indonesia.
| | - Randi Ade Candra
- Yayasan Konservasi Alam Nusantara, Graha Iskandarsyah Bld, 3rd floor, Jl. Iskandarsyah Raya No.66C, Jakarta, 12160, Indonesia
| | - Chandra Agung Septiadi Putra
- Yayasan Konservasi Alam Nusantara, Graha Iskandarsyah Bld, 3rd floor, Jl. Iskandarsyah Raya No.66C, Jakarta, 12160, Indonesia
| | - Adibtya Asyhari
- Yayasan Konservasi Alam Nusantara, Graha Iskandarsyah Bld, 3rd floor, Jl. Iskandarsyah Raya No.66C, Jakarta, 12160, Indonesia
| | - Adi Gangga
- Yayasan Konservasi Alam Nusantara, Graha Iskandarsyah Bld, 3rd floor, Jl. Iskandarsyah Raya No.66C, Jakarta, 12160, Indonesia
| | - Rasis Putra Ritonga
- Yayasan Konservasi Alam Nusantara, Graha Iskandarsyah Bld, 3rd floor, Jl. Iskandarsyah Raya No.66C, Jakarta, 12160, Indonesia
| | - Muhammad Ilman
- Yayasan Konservasi Alam Nusantara, Graha Iskandarsyah Bld, 3rd floor, Jl. Iskandarsyah Raya No.66C, Jakarta, 12160, Indonesia
| | - Aji W Anggoro
- Yayasan Konservasi Alam Nusantara, Graha Iskandarsyah Bld, 3rd floor, Jl. Iskandarsyah Raya No.66C, Jakarta, 12160, Indonesia
| | - Nisa Novita
- Yayasan Konservasi Alam Nusantara, Graha Iskandarsyah Bld, 3rd floor, Jl. Iskandarsyah Raya No.66C, Jakarta, 12160, Indonesia
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8
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Pacheco CFO, Queiroz HM, Mazzuco ACA, Nóbrega GN, Ferreira TO, Bernardino AF. Soil greenhouse gas emissions from dead and natural mangrove forests in Southeastern Brazil. MARINE POLLUTION BULLETIN 2024; 203:116487. [PMID: 38744046 DOI: 10.1016/j.marpolbul.2024.116487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 05/07/2024] [Accepted: 05/08/2024] [Indexed: 05/16/2024]
Abstract
Mangroves forests may be important sinks of carbon in coastal areas but upon their death, these forests may become net sources of carbon dioxide (CO2) and methane (CH4) to the atmosphere. Here we assessed the spatial and temporal variability in soil CO2 and CH4 fluxes from dead mangrove forests and paired intact sites in SE-Brazil. Our findings demonstrated that during warmer and drier conditions, CO2 soil flux was 183 % higher in live mangrove forests when compared to the dead mangrove forests. Soil CH4 emissions in live forests were > 1.4-fold higher than the global mangrove average. During the wet season, soil GHG emissions dropped significantly at all sites. During warmer conditions, mangroves were net sources of GHG, with a potential warming effect (GWP100) of 32.9 ± 10.2 (±SE) Mg CO2e ha-1 y-1. Overall, we found that dead mangroves did not release great amounts of GHG after three years of forest loss.
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Affiliation(s)
- Carla F O Pacheco
- Departamento de Oceanografia, Universidade Federal do Espírito Santo, Vitória, Espírito Santo, Brazil
| | - Hermano M Queiroz
- Departamento de Geografia, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Ana Carolina A Mazzuco
- Departamento de Oceanografia, Universidade Federal do Espírito Santo, Vitória, Espírito Santo, Brazil; Intergovernmental Oceanographic Commission of UNESCO, Project Office for IODE, Oostende, Flanders, Belgium
| | - Gabriel N Nóbrega
- Departamento de Ciências do Solo, Centro de Ciências Agrárias, Universidade Federal do Ceará, Fortaleza, CE, Brazil
| | - Tiago O Ferreira
- Departamento de Ciências do Solo, ESALQ, Universidade de Sao Paulo, Piracicaba, SP, Brazil
| | - Angelo F Bernardino
- Departamento de Oceanografia, Universidade Federal do Espírito Santo, Vitória, Espírito Santo, Brazil.
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9
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Liu T, Chen X, Du M, Sanders CJ, Li C, Tang J, Yang H. Replacing Spartina alterniflora with northward-afforested mangroves has the potential to acquire extra blue carbon. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 921:170952. [PMID: 38360327 DOI: 10.1016/j.scitotenv.2024.170952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 01/17/2024] [Accepted: 02/11/2024] [Indexed: 02/17/2024]
Abstract
Climate change provides an opportunity for the northward expansion of mangroves, and thus, the afforestation of mangroves at higher latitude areas presents an achievable way for coastal restoration, especially where invasive species S. alterniflora needs to be clipped. However, it is unclear whether replacing S. alterniflora with northward-afforested mangroves would benefit carbon sequestration. In the study, we examined the key CO2 and CH4 exchange processes in a young (3 yr) northward-afforested wetland dominated by K. obovata. We also collected soil cores from various ages (3, 15, 30, and 60 years) to analyze the carbon storage characteristics of mangrove stands using a space-for-time substitution approach. Our findings revealed that the young northward mangroves exhibited obvious seasonal variations in net ecosystem CO2 exchange (NEE) and functioned as a moderate carbon sink, with an average annual NEE of -107.9 g C m-2 yr-1. Additionally, the CH4 emissions from the northward mangroves were lower in comparison to natural mangroves, with the primary source being the soil. Furthermore, when comparing the vertical distribution of soil carbon, it became evident that both S. alterniflora and mangroves contributed to organic carbon accumulation in the upper soil layers. Our study also identified a clear correlation that the biomass and carbon stocks of mangroves increased logarithmically with age (R2 = 0.69, p < 0.001). Notably, both vegetation and soil carbon stocks (especially in the deeper layers) of the 15 yr northward mangroves, were markedly higher than those of S. alterniflora. This suggests that replacing S. alterniflora with northward-afforested mangroves is an effective long-term strategy for future coasts to enhance blue carbon sequestration.
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Affiliation(s)
- Tingting Liu
- State Key Laboratory of Estuarine and Coastal Research, Institute of Eco-Chongming, Center for Blue Carbon Science and Technology, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, PR China
| | - Xuechu Chen
- State Key Laboratory of Estuarine and Coastal Research, Institute of Eco-Chongming, Center for Blue Carbon Science and Technology, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, PR China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, 500 Dong Chuan Road, Shanghai 200241, PR China; Yangtze Delta Estuarine Wetland Ecosystem Observation and Research Station, Ministry of Education & Shanghai Science and Technology Committee, Shanghai 202162, PR China
| | - Minghui Du
- State Key Laboratory of Estuarine and Coastal Research, Institute of Eco-Chongming, Center for Blue Carbon Science and Technology, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, PR China
| | - Christian J Sanders
- National Marine Science Centre, School of Environment, Science and Engineering, Southern Cross University, Coffs Harbour, NSW 2450, Australia
| | - Changda Li
- Marine and Fisheries Development Research Center, Dongtou District, Wenzhou 325000, PR China
| | - Jianwu Tang
- State Key Laboratory of Estuarine and Coastal Research, Institute of Eco-Chongming, Center for Blue Carbon Science and Technology, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, PR China; Yangtze Delta Estuarine Wetland Ecosystem Observation and Research Station, Ministry of Education & Shanghai Science and Technology Committee, Shanghai 202162, PR China
| | - Hualei Yang
- State Key Laboratory of Estuarine and Coastal Research, Institute of Eco-Chongming, Center for Blue Carbon Science and Technology, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, PR China; Yangtze Delta Estuarine Wetland Ecosystem Observation and Research Station, Ministry of Education & Shanghai Science and Technology Committee, Shanghai 202162, PR China.
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10
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Lin CW, Lin WJ, Ho CW, Kao YC, Yong ZJ, Lin HJ. Flushing emissions of methane and carbon dioxide from mangrove soils during tidal cycles. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 919:170768. [PMID: 38340838 DOI: 10.1016/j.scitotenv.2024.170768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 01/31/2024] [Accepted: 02/04/2024] [Indexed: 02/12/2024]
Abstract
Mangroves are transition areas connecting land, freshwater, and the ocean, where a great amount of organic carbon accumulates in the soil, forming a considerable carbon sink. However, the soil might also be a source of greenhouse gas (GHG) emissions. This study hypothesized that measuring GHG emissions solely during low tides can represent diurnal GHG emissions in mangroves. Methane (CH4) and carbon dioxide (CO2) emissions were quantified during tidal cycles using an ultraportable gas analyzer in Kandelia obovata (without pneumatophores) and Avicennia marina (with pneumatophores) mangroves in summer and fall. The results showed that the CH4 fluxes varied greatly during tidal cycles, from -1.25 to 96.24 μmol CH4 m-2 h-1 for K. obovata and from 2.86 to 2662.00 μmol CH4 m-2 h-1 for A. marina. The CO2 fluxes ranged from -4.23 to 20.65 mmol CO2 m-2 h-1 for K. obovata and from 0.09 to 24.69 mmol CO2 m-2 h-1 for A. marina. The diurnal variation in GHG levels in mangroves is predominantly driven by tidal cycles. The peak emissions of CH4 and CO2 were noted at the beginning of the flooding tide, rather than during daytime or nighttime. While the patterns of the CO2 fluxes during tidal cycles were similar between K. obovata and A. marina mangroves, their CH4 flux patterns during the tidal cycles differed. Possibly due to different transport mechanisms, CO2 emissions are primarily influenced by surface soils, whereas CH4 is predominantly emitted from deeper soils, thus being influenced by root structures. To reduce the uncertainty in measuring GHG emissions in mangrove soils during a tidal cycle, it is advisable to increase the number of GHG flux measurements during the period spanning 30 min before and after the beginning of the flooding and ebbing tides.
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Affiliation(s)
- Chiao-Wen Lin
- Department of Marine Environment and Engineering, The Center for Water Resources Studies, National Sun Yat-sen University, Kaohsiung 80424, Taiwan.
| | - Wei-Jen Lin
- Department of Life Sciences and Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung 40227, Taiwan
| | - Chuan-Wen Ho
- Department of Life Sciences and Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung 40227, Taiwan
| | - Yu-Chen Kao
- Department of Life Sciences and Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung 40227, Taiwan
| | - Zhao-Jun Yong
- Department of Life Sciences and Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung 40227, Taiwan
| | - Hsing-Juh Lin
- Department of Life Sciences and Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung 40227, Taiwan.
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11
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Ho CT, Tatsuya U, Nguyen SG, Nguyen TH, Dinh ST, Le ST, Pham TMH. Seasonal Change of Sediment Microbial Communities and Methane Emission in Young and Old Mangrove Forests in Xuan Thuy National Park. J Microbiol Biotechnol 2024; 34:580-588. [PMID: 38321644 PMCID: PMC11016791 DOI: 10.4014/jmb.2311.11050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 12/15/2023] [Accepted: 12/21/2023] [Indexed: 02/08/2024]
Abstract
Microbial communities in mangrove forests have recently been intensively investigated to explain the ecosystem function of mangroves. In this study, the soil microbial communities under young (<11 years-old) and old (>17 years-old) mangroves have been studied during dry and wet seasons. In addition, biogeochemical properties of sediments and methane emission from the two different mangrove ages were measured. The results showed that young and old mangrove soil microbial communities were significantly different on both seasons. Seasons seem to affect microbial communities more than the mangrove age does. Proteobacteria and Chloroflexi were two top abundant phyla showing >15%. Physio-chemical properties of sediment samples showed no significant difference between mangrove ages, seasons, nor depth levels, except for TOC showing significant difference between the two seasons. The methane emission rates from the mangroves varied depending on seasons and ages of the mangrove. However, this did not show significant correlation with the microbial community shifts, suggesting that abundance of methanogens was not the driving factor for mangrove soil microbial communities.
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Affiliation(s)
- Cuong Tu Ho
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi 10072, Vietnam
| | - Unno Tatsuya
- Department of Microbiology, Chungbuk National University, Cheongju, Republic of Korea
| | - Son Giang Nguyen
- Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, Ha Noi 10072, Vietnam
| | - Thi-Hanh Nguyen
- Institute of Chemistry, Vietnam Academy of Science and Technology, Ha Noi, 10072, Vietnam
| | | | - Son Tho Le
- College of Forestry Biotechnology, Vietnam National University of Forestry, Ha Noi, Vietnam
| | - Thi-Minh-Hanh Pham
- Institute of Mechanics, Vietnam Academy of Science and Technology, Ha Noi, Vietnam
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12
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Pessarrodona A, Howard J, Pidgeon E, Wernberg T, Filbee-Dexter K. Carbon removal and climate change mitigation by seaweed farming: A state of knowledge review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 918:170525. [PMID: 38309363 DOI: 10.1016/j.scitotenv.2024.170525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 12/31/2023] [Accepted: 01/26/2024] [Indexed: 02/05/2024]
Abstract
The pressing need to mitigate the effects of climate change is driving the development of novel approaches for carbon dioxide removal (CDR) from the atmosphere, with the ocean playing a central role in the portfolio of solutions. The expansion of seaweed farming is increasingly considered as one of the potential CDR avenues among government and private sectors. Yet, comprehensive assessments examining whether farming can lead to tangible climate change mitigation remain limited. Here we examine the results of over 100 publications to synthesize evidence regarding the CDR capacity of seaweed farms and review the different interventions through which an expansion of seaweed farming may contribute to climate change mitigation. We find that presently, the majority of the carbon fixed by seaweeds is stored in short-term carbon reservoirs (e.g., seaweed products) and that only a minority of the carbon ends up in long-term reservoirs that are likely to fit within existing international accounting frameworks (e.g., marine sediments). Additionally, the tiny global area cultivated to date (0.06 % of the estimated wild seaweed extent) limits the global role of seaweed farming in climate change mitigation in the present and mid-term future. A first-order estimate using the best available data suggests that, at present, even in a low emissions scenario, any carbon removal capacity provided by seaweed farms globally is likely to be offset by their emissions (median global balance net emitter: -0.11 Tg C yr-1; range -2.07-1.95 Tg C yr-1), as most of a seaweed farms' energy and materials currently depend on fossil fuels. Enhancing any potential CDR though seaweed farming will thus require decarbonizing of supply chains, directing harvested biomass to long-term carbon storage products, expanding farming outside traditional cultivation areas, and developing robust models tracing the fate of seaweed carbon. This will present novel scientific (e.g., verifying permanence of seaweed carbon), engineering (e.g., developing farms in wave exposed areas), and economic challenges (e.g., increase market demand, lower costs, decarbonize at scale), many of which are only beginning to be addressed.
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Affiliation(s)
- Albert Pessarrodona
- UWA Oceans Institute and School of Biological Sciences, University of Western Australia, Crawley, Western Australia 6009, Australia; Conservation International, Arlington, VA, USA; International Blue Carbon Institute, Singapore.
| | - Jennifer Howard
- Conservation International, Arlington, VA, USA; International Blue Carbon Institute, Singapore
| | - Emily Pidgeon
- Conservation International, Arlington, VA, USA; International Blue Carbon Institute, Singapore
| | - Thomas Wernberg
- UWA Oceans Institute and School of Biological Sciences, University of Western Australia, Crawley, Western Australia 6009, Australia; Institute of Marine Research, His, Norway
| | - Karen Filbee-Dexter
- UWA Oceans Institute and School of Biological Sciences, University of Western Australia, Crawley, Western Australia 6009, Australia; Institute of Marine Research, His, Norway
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13
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Li X, Cheng X, Cheng K, Cai Z, Feng S, Zhou J. The influence of tide-brought nutrients on microbial carbon metabolic profiles of mangrove sediments. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167732. [PMID: 37827311 DOI: 10.1016/j.scitotenv.2023.167732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Revised: 10/06/2023] [Accepted: 10/08/2023] [Indexed: 10/14/2023]
Abstract
Mangrove ecosystems in the intertidal zone are continually affected by tidal inundation, but the impact of tidal-driven nutrient inputs upon bacterial communities and carbon metabolic features in mangrove surface sediments remains underexplored, and the differences in such impacts across backgrounds are not known. Here, two mangrove habitats with contrasting nutrient backgrounds in Shenzhen Bay and Daya Bay in Shenzhen City, China, respectively, were studied to investigate the effects of varying tidal nutrient inputs (especially dissolved inorganic nitrogen and PO43--P) on bacterial community composition and functioning in sediment via field sampling, 16S rDNA amplicon sequencing, and the quantitative potential of microbial element cycling. Results showed that tidal input increased Shenzhen Bay mangrove's eutrophication level whereas it maintained the Daya Bay mangrove's relatively oligotrophic status. Dissolved inorganic nitrogen and PO43--P levels in Shenzhen Bay were respectively 12.6-39.6 and 7.3-29.1 times higher than those in Daya Bay (p < 0.05). In terms of microbial features, Desulfobacteraceae was the dominant family in Shenzhen Bay, while the Anaerolineaceae family dominated in Daya Bay. Co-occurrence network analysis revealed more interconnected and complex microbial networks in Shenzhen Bay. The quantitative gene-chip analysis uncovered more carbon-related functional genes (including carbon degradation and fixation) enriched in Shenzhen Bay's sediment microbial communities than Daya Bay's. Partial least squares path modeling indicated that tidal behavior directly affected mangrove sediments' physicochemical characteristics, with cascading effects shaping microbial diversity and C-cycling function. Altogether, these findings demonstrate that how tides influence the microbial carbon cycle in mangrove sediments is co-correlated with the concentration of nutrient inputs and background status of sediment. This work offers an insightful lens for better understanding bacterial community structure and carbon metabolic features in mangrove sediments under their tidal influences. It provides a theoretical basis to better evaluate and protect mangroves in the context of global change.
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Affiliation(s)
- Xinyang Li
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, PR China
| | - Xueyu Cheng
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, PR China
| | - Keke Cheng
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, PR China
| | - Zhonghua Cai
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, PR China
| | - Shuying Feng
- Medical College, Henan University of Chinese Medicine, Zhengzhou, Henan 450056, PR China.
| | - Jin Zhou
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, PR China.
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14
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Capooci M, Seyfferth AL, Tobias C, Wozniak AS, Hedgpeth A, Bowen M, Biddle JF, McFarlane KJ, Vargas R. High methane concentrations in tidal salt marsh soils: Where does the methane go? GLOBAL CHANGE BIOLOGY 2024; 30:e17050. [PMID: 38273533 DOI: 10.1111/gcb.17050] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 10/18/2023] [Accepted: 10/18/2023] [Indexed: 01/27/2024]
Abstract
Tidal salt marshes produce and emit CH4 . Therefore, it is critical to understand the biogeochemical controls that regulate CH4 spatial and temporal dynamics in wetlands. The prevailing paradigm assumes that acetoclastic methanogenesis is the dominant pathway for CH4 production, and higher salinity concentrations inhibit CH4 production in salt marshes. Recent evidence shows that CH4 is produced within salt marshes via methylotrophic methanogenesis, a process not inhibited by sulfate reduction. To further explore this conundrum, we performed measurements of soil-atmosphere CH4 and CO2 fluxes coupled with depth profiles of soil CH4 and CO2 pore water gas concentrations, stable and radioisotopes, pore water chemistry, and microbial community composition to assess CH4 production and fate within a temperate tidal salt marsh. We found unexpectedly high CH4 concentrations up to 145,000 μmol mol-1 positively correlated with S2- (salinity range: 6.6-14.5 ppt). Despite large CH4 production within the soil, soil-atmosphere CH4 fluxes were low but with higher emissions and extreme variability during plant senescence (84.3 ± 684.4 nmol m-2 s-1 ). CH4 and CO2 within the soil pore water were produced from young carbon, with most Δ14 C-CH4 and Δ14 C-CO2 values at or above modern. We found evidence that CH4 within soils was produced by methylotrophic and hydrogenotrophic methanogenesis. Several pathways exist after CH4 is produced, including diffusion into the atmosphere, CH4 oxidation, and lateral export to adjacent tidal creeks; the latter being the most likely dominant flux. Our findings demonstrate that CH4 production and fluxes are biogeochemically heterogeneous, with multiple processes and pathways that can co-occur and vary in importance over the year. This study highlights the potential for high CH4 production, the need to understand the underlying biogeochemical controls, and the challenges of evaluating CH4 budgets and blue carbon in salt marshes.
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Affiliation(s)
- Margaret Capooci
- Department of Plant and Soil Science, University of Delaware, Newark, Delaware, USA
| | - Angelia L Seyfferth
- Department of Plant and Soil Science, University of Delaware, Newark, Delaware, USA
| | - Craig Tobias
- Department of Marine Sciences, University of Connecticut, Groton, Connecticut, USA
| | - Andrew S Wozniak
- School of Marine Science and Policy, University of Delaware, Lewes, Delaware, USA
| | - Alexandra Hedgpeth
- Department of Geography, University of California, Los Angeles, Los Angeles, California, USA
- Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, California, USA
| | - Malique Bowen
- School of Marine Science and Policy, University of Delaware, Lewes, Delaware, USA
| | - Jennifer F Biddle
- School of Marine Science and Policy, University of Delaware, Lewes, Delaware, USA
| | - Karis J McFarlane
- Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, California, USA
| | - Rodrigo Vargas
- Department of Plant and Soil Science, University of Delaware, Newark, Delaware, USA
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15
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Ouyang X, Guo F, Lee SY. Multiple drivers for carbon stocks and fluxes in different types of mangroves. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167511. [PMID: 37793441 DOI: 10.1016/j.scitotenv.2023.167511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/19/2023] [Accepted: 09/29/2023] [Indexed: 10/06/2023]
Abstract
Mangroves are highly efficient in sequestering carbon from the atmosphere and can accumulate carbon in sediments for millennials. However, The fate of mangrove carbon has not been well constrained due to the lack of data on different pools of sediment carbon sinks and sources. This study examined the variation of carbon stocks and fluxes at the water-sediment-air interface in both estuarine mangroves (natural: Mai Po, restored: Gei Wai) and oceanic mangroves (Ting Kok). There are divergent patterns in biogeochemical variables at the sediment-water-air interface, likely due to significant variation within sites. Total sediment carbon stocks (TCs) ranked in the order of restored estuarine mangroves (392.5 ± 8.8 Mg ha-1), natural estuarine mangroves affected by aquaculture (315.2 ± 21.4 Mg ha-1) and oceanic mangroves (229.1 ± 32.3 Mg ha-1). Sediment organic carbon stocks (SOC) and inorganic carbon stocks (SIC) accounted for 84.1-90.2 % and 9.8-15.9 % of TC, respectively. The highest sediment-air CO2 and CH4 fluxes occurred in restored and natural estuarine mangroves affected by aquaculture, respectively. The isotope of CO2 fluxes (δ13C-CO2) indicates higher contributions from the degradation of mangrove-derived organic carbon in restored (-25.94 ‰ ± 3.37 ‰) and natural estuarine mangroves affected by aquaculture (-25.54 ‰ ± 0.96 ‰) than in oceanic mangroves (-21.55 ‰ ± 1.36 ‰). The isotope of CH4 fluxes (δ13C-CH4) indicates CH4 production dominated by acetate fermentation in restored estuarine mangroves but dominated by the reduction of CO2 for other sites. Future studies should better constrain the fate of mangrove carbon by considering local drivers.
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Affiliation(s)
- Xiaoguang Ouyang
- Research Centre of Ecology & Environment for Coastal Area and Deep Sea, Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China; Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, China; Simon F. S. Li Marine Science Laboratory, School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong.
| | - Fen Guo
- Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, China; Simon F. S. Li Marine Science Laboratory, School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Shing Yip Lee
- Simon F. S. Li Marine Science Laboratory, School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong
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16
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Pessarrodona A, Franco-Santos RM, Wright LS, Vanderklift MA, Howard J, Pidgeon E, Wernberg T, Filbee-Dexter K. Carbon sequestration and climate change mitigation using macroalgae: a state of knowledge review. Biol Rev Camb Philos Soc 2023; 98:1945-1971. [PMID: 37437379 DOI: 10.1111/brv.12990] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 06/05/2023] [Accepted: 06/07/2023] [Indexed: 07/14/2023]
Abstract
The conservation, restoration, and improved management of terrestrial forests significantly contributes to mitigate climate change and its impacts, as well as providing numerous co-benefits. The pressing need to reduce emissions and increase carbon removal from the atmosphere is now also leading to the development of natural climate solutions in the ocean. Interest in the carbon sequestration potential of underwater macroalgal forests is growing rapidly among policy, conservation, and corporate sectors. Yet, our understanding of whether carbon sequestration from macroalgal forests can lead to tangible climate change mitigation remains severely limited, hampering their inclusion in international policy or carbon finance frameworks. Here, we examine the results of over 180 publications to synthesise evidence regarding macroalgal forest carbon sequestration potential. We show that research efforts on macroalgae carbon sequestration are heavily skewed towards particulate organic carbon (POC) pathways (77% of data publications), and that carbon fixation is the most studied flux (55%). Fluxes leading directly to carbon sequestration (e.g. carbon export or burial in marine sediments) remain poorly resolved, likely hindering regional or country-level assessments of carbon sequestration potential, which are only available from 17 of the 150 countries where macroalgal forests occur. To solve this issue, we present a framework to categorize coastlines according to their carbon sequestration potential. Finally, we review the multiple avenues through which this sequestration can translate into climate change mitigation capacity, which largely depends on whether management interventions can increase carbon removal above a natural baseline or avoid further carbon emissions. We find that conservation, restoration and afforestation interventions on macroalgal forests can potentially lead to carbon removal in the order of 10's of Tg C globally. Although this is lower than current estimates of natural sequestration value of all macroalgal habitats (61-268 Tg C year-1 ), it suggests that macroalgal forests could add to the total mitigation potential of coastal blue carbon ecosystems, and offer valuable mitigation opportunities in polar and temperate areas where blue carbon mitigation is currently low. Operationalizing that potential will necessitate the development of models that reliably estimate the proportion of production sequestered, improvements in macroalgae carbon fingerprinting techniques, and a rethinking of carbon accounting methodologies. The ocean provides major opportunities to mitigate and adapt to climate change, and the largest coastal vegetated habitat on Earth should not be ignored simply because it does not fit into existing frameworks.
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Affiliation(s)
- Albert Pessarrodona
- UWA Oceans Institute and School of Biological Sciences, University of Western Australia, Crawley, 6009, Western Australia, Australia
- Conservation International, 2011 Crystal Dr., Suite 600, Arlington, VA, USA
- International Blue Carbon Institute, 42B Boat Quay, Singapore, 049831, Singapore
| | - Rita M Franco-Santos
- CSIRO Environment, Indian Ocean Marine Research Centre, Crawley, 6009, Western Australia, Australia
| | - Luka Seamus Wright
- UWA Oceans Institute and School of Biological Sciences, University of Western Australia, Crawley, 6009, Western Australia, Australia
- CSIRO Environment, Indian Ocean Marine Research Centre, Crawley, 6009, Western Australia, Australia
| | - Mathew A Vanderklift
- CSIRO Environment, Indian Ocean Marine Research Centre, Crawley, 6009, Western Australia, Australia
| | - Jennifer Howard
- Conservation International, 2011 Crystal Dr., Suite 600, Arlington, VA, USA
- International Blue Carbon Institute, 42B Boat Quay, Singapore, 049831, Singapore
| | - Emily Pidgeon
- Conservation International, 2011 Crystal Dr., Suite 600, Arlington, VA, USA
- International Blue Carbon Institute, 42B Boat Quay, Singapore, 049831, Singapore
| | - Thomas Wernberg
- UWA Oceans Institute and School of Biological Sciences, University of Western Australia, Crawley, 6009, Western Australia, Australia
- Institute of Marine Research, Nye Flødevigveien 20, His, 4817, Norway
| | - Karen Filbee-Dexter
- UWA Oceans Institute and School of Biological Sciences, University of Western Australia, Crawley, 6009, Western Australia, Australia
- Institute of Marine Research, Nye Flødevigveien 20, His, 4817, Norway
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17
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N RH, Tait DR, Nandan SB. Land use drives large CH 4 fluxes from a highly urbanized Indian estuary. MARINE POLLUTION BULLETIN 2023; 196:115594. [PMID: 37797539 DOI: 10.1016/j.marpolbul.2023.115594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 09/22/2023] [Accepted: 09/24/2023] [Indexed: 10/07/2023]
Abstract
There is growing awareness of the need to better constrain the contribution of atmospheric methane (CH4) fluxes from urbanized estuaries due to the high global warming potential of CH4 and the accelerating growth of urban expansion. This study undertook seasonal sampling campaigns to understand the impact of urbanization on atmospheric CH4 fluxes and their drivers in a large, tropical estuary in India. Overall, the study found that the Cochin estuary emitted large amounts of CH4 (398.8 ± 141.6 μmolm-2d-1) to the atmosphere with CH4 hotspots reaching up to 939.7 μmolm-2d-1 were identified. The strongest drivers of CH4 dynamics in different anthropogenically impacted zones were traced. The source of organic matter for CH4 production was revealed to be terrestrial C3 plants, autochthonous production, marine phytoplankton, and sewage inputs. The study suggests that monsoonal urbanized tropical estuaries may be an important but under-recognized element of the global CH4 budget.
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Affiliation(s)
- Regina Hershey N
- Dept. of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University of Science and Technology, Cochin 682 016, India; Dept. of Zoology, Bharata Mata College, Thrikkakara, Cochin 682 021, India.
| | - Douglas R Tait
- Faculty of Science and Engineering, Southern Cross University, Lismore, New South Wales 2480, Australia.
| | - S Bijoy Nandan
- Dept. of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University of Science and Technology, Cochin 682 016, India.
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18
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Wang F, Liu J, Qin G, Zhang J, Zhou J, Wu J, Zhang L, Thapa P, Sanders CJ, Santos IR, Li X, Lin G, Weng Q, Tang J, Jiao N, Ren H. Coastal blue carbon in China as a nature-based solution toward carbon neutrality. Innovation (N Y) 2023; 4:100481. [PMID: 37636281 PMCID: PMC10451025 DOI: 10.1016/j.xinn.2023.100481] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Accepted: 07/09/2023] [Indexed: 08/29/2023] Open
Abstract
To achieve the Paris Agreement, China pledged to become "Carbon Neutral" by the 2060s. In addition to massive decarbonization, this would require significant changes in ecosystems toward negative CO2 emissions. The ability of coastal blue carbon ecosystems (BCEs), including mangrove, salt marsh, and seagrass meadows, to sequester large amounts of CO2 makes their conservation and restoration an important "nature-based solution (NbS)" for climate adaptation and mitigation. In this review, we examine how BCEs in China can contribute to climate mitigation. On the national scale, the BCEs in China store up to 118 Tg C across a total area of 1,440,377 ha, including over 75% as unvegetated tidal flats. The annual sedimental C burial of these BCEs reaches up to 2.06 Tg C year-1, of which most occurs in salt marshes and tidal flats. The lateral C flux of mangroves and salt marshes contributes to 1.17 Tg C year-1 along the Chinese coastline. Conservation and restoration of BCEs benefit climate change mitigation and provide other ecological services with a value of $32,000 ha-1 year-1. The potential practices and technologies that can be implemented in China to improve BCE C sequestration, including their constraints and feasibility, are also outlined. Future directions are suggested to improve blue carbon estimates on aerial extent, carbon stocks, sequestration, and mitigation potential. Restoring and preserving BCEs would be a cost-effective step to achieve Carbon Neutral by 2060 in China despite various barriers that should be removed.
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Affiliation(s)
- Faming Wang
- Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, and the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 510650, China
| | - Jihua Liu
- Marine Research Institute, Shandong University, Qingdao 266237, China
| | - Guoming Qin
- Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, and the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 510650, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jingfan Zhang
- Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, and the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 510650, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jinge Zhou
- Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, and the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 510650, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jingtao Wu
- Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, and the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 510650, China
| | - Lulu Zhang
- Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, and the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 510650, China
| | - Poonam Thapa
- Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, and the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 510650, China
| | - Christian J. Sanders
- National Marine Science Centre, Faculty of Science and Engineering, Southern Cross University, Coffs Harbour, NSW 2450, Australia
| | - Isaac R. Santos
- Department of Marine Sciences, University of Gothenburg, 41319 Gothenburg, Sweden
| | - Xiuzhen Li
- State Key Laboratory of Estuarine and Coastal Research and Institute of Eco-Chongming, East China Normal University, Shanghai 201100, China
| | - Guanghui Lin
- Key Laboratory for Earth System Modeling, Ministry of Education, Department of Earth System Science, Tsinghua University, Beijing 100084, China
- Laboratory of Stable Isotope and Gulf Ecology, Institute of Ocean Engineering, Tsinghua’s Shenzhen International Graduate School, Shenzhen 518055, China
| | - Qihao Weng
- Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hongkong 999077, China
| | - Jianwu Tang
- State Key Laboratory of Estuarine and Coastal Research and Institute of Eco-Chongming, East China Normal University, Shanghai 201100, China
| | - Nianzhi Jiao
- Innovative Research Center for Carbon Neutralization, Global ONCE Program, Xiamen 361005, China
| | - Hai Ren
- Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, and the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 510650, China
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19
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Tan L, Zhang L, Yang P, Tong C, Lai DYF, Yang H, Hong Y, Tian Y, Tang C, Ruan M, Tang KW. Effects of conversion of coastal marshes to aquaculture ponds on sediment anaerobic CO 2 production and emission in a subtropical estuary of China. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 338:117813. [PMID: 36996562 DOI: 10.1016/j.jenvman.2023.117813] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 03/23/2023] [Accepted: 03/24/2023] [Indexed: 06/19/2023]
Abstract
The extensive conversion of carbon-rich coastal wetland to aquaculture ponds in the Asian Pacific region has caused significant changes to the sediment properties and carbon cycling. Using field sampling and incubation experiments, the sediment anaerobic CO2 production and CO2 emission flux were compared between a brackish marsh and the nearby constructed aquaculture ponds in the Min River Estuary in southeastern China over a three-year period. Marsh sediment had a higher total carbon and lower C:N ratio than aquaculture pond sediment, suggesting the importance of marsh vegetation in supplying labile organic carbon to the sediment. Conversion to aquaculture ponds significantly decreased sediment anaerobic CO2 production rates by 69.2% compared to the brackish marsh, but increased CO2 emission, turning the CO2 sink (-490.8 ± 42.0 mg m-2 h-1 in brackish marsh) into a source (6.2 ± 3.9 mg m-2 h-1 in aquaculture pond). Clipping the marsh vegetation resulted in the highest CO2 emission flux (382.6 ± 46.7 mg m-2 h-1), highlighting the critical role of marsh vegetation in capturing and sequestering carbon. Sediment anaerobic CO2 production and CO2 uptake (in brackish marsh) and emission (in aquaculture ponds) were highest in the summer, followed by autumn, spring and winter. Redundancy analysis and structural equation modeling showed that the changes of sediment temperature, salinity and total carbon content accounted for more than 50% of the variance in CO2 production and emission. Overall, the results indicate that vegetation clearing was the main cause of change in CO2 production and emission in the land conversion, and marsh replantation should be a primary strategy to mitigate the climate impact of the aquaculture sector.
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Affiliation(s)
- Lishan Tan
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350117, PR China; Institute of Geography, Fujian Normal University, Fuzhou, 350117, PR China
| | - Linhai Zhang
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350117, PR China; Institute of Geography, Fujian Normal University, Fuzhou, 350117, PR China
| | - Ping Yang
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350117, PR China; Institute of Geography, Fujian Normal University, Fuzhou, 350117, PR China; Fujian Provincial Key Laboratory for Subtropical Resources and Environment, Fujian Normal University, Fuzhou, 350117, PR China; Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350117, PR China.
| | - Chuan Tong
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350117, PR China; Institute of Geography, Fujian Normal University, Fuzhou, 350117, PR China; Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350117, PR China
| | - Derrick Y F Lai
- Department of Geography and Resource Management, The Chinese University of Hong Kong, Hong Kong, China
| | - Hong Yang
- College of Environmental Science and Engineering, Fujian Normal University, Fuzhou, 350007, PR China; Department of Geography and Environmental Science, University of Reading, Reading, RG6 6AB, UK
| | - Yan Hong
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350117, PR China
| | - Yalan Tian
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350117, PR China
| | - Chen Tang
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350117, PR China
| | - Manjing Ruan
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350117, PR China
| | - Kam W Tang
- Department of Biosciences, Swansea University, Swansea, SA2 8PP, UK.
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20
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Yin S, Wang J, Zeng H. A bibliometric study on carbon cycling in vegetated blue carbon ecosystems. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-27816-2. [PMID: 37243764 DOI: 10.1007/s11356-023-27816-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Accepted: 05/17/2023] [Indexed: 05/29/2023]
Abstract
Understanding carbon cycling in blue carbon ecosystems is key to sequestrating more carbon in these ecosystems to mitigate climate change. However, limited information is available on the basic characteristics of publications, research hotspots, research frontiers, and the evolution of topics related to carbon cycling in different blue carbon ecosystems. Here, we conducted bibliometric analysis on carbon cycling in salt marsh, mangrove, and seagrass ecosystems. The results showed that interest in this field has dramatically increased with time, particularly for mangroves. The USA has substantially contributed to the research on all ecosystems. Research hotspots for salt marshes were sedimentation process, carbon sequestration, carbon emissions, lateral carbon exchange, litter decomposition, plant carbon fixation, and carbon sources. In addition, biomass estimation by allometric equations was a hotspot for mangroves, and carbonate cycling and ocean acidification were hotspots for seagrasses. Topics involving energy flow, such as productivity, food webs, and decomposition, were the predominant areas a decade ago. Current research frontiers mainly concentrated on climate change and carbon sequestration for all ecosystems, while methane emission was a common frontier for mangroves and salt marshes. Ecosystem-specific research frontiers included mangrove encroachment for salt marshes, ocean acidification for seagrasses, and aboveground biomass estimation and restoration for mangroves. Future research should expand estimates of lateral carbon exchange and carbonate burial and strengthen the exploration of the impacts of climate change and restoration on blue carbon. Overall, this study provides the research status of carbon cycling in vegetated blue carbon ecosystems, which favors knowledge exchanges for future research.
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Affiliation(s)
- Shuo Yin
- School of Urban Planning and Design, Peking University Shenzhen Graduate School, Peking University, Shenzhen, 518055, Guangdong, China
- College of Urban and Environment Sciences, Peking University, Beijing, 100871, China
| | - Junjian Wang
- Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Hui Zeng
- School of Urban Planning and Design, Peking University Shenzhen Graduate School, Peking University, Shenzhen, 518055, Guangdong, China.
- College of Urban and Environment Sciences, Peking University, Beijing, 100871, China.
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21
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Li Y, Fu C, Hu J, Zeng L, Tu C, Luo Y. Soil Carbon, Nitrogen, and Phosphorus Stoichiometry and Fractions in Blue Carbon Ecosystems: Implications for Carbon Accumulation in Allochthonous-Dominated Habitats. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:5913-5923. [PMID: 36996086 DOI: 10.1021/acs.est.3c00012] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Blue carbon ecosystems (BCEs) including mangroves, saltmarshes, and seagrasses are highly efficient for organic carbon (OC) accumulation due to their unique ability to trap high rates of allochthonous substrates. It has been suggested that the magnitude of OC preservation is constrained by nitrogen (N) and phosphorus (P) limitation in response to climate and anthropogenic changes. However, little is known about the connection of soil OC with N-P and their forms in response to allochthonous inputs in BCEs. By analyzing soil OC, N, and P densities of BCEs from 797 sites globally, we find that, in China, where allochthonous OC provides 50-75% of total OC, soil C/P and N/P ratios are 4- to 8-fold lower than their global means, and 23%, 29%, and 20% of buried OC, N, and P are oxidation-resistant fractions that linked with minerals. We estimate that the OC stocks in China should double over the next 40 years under high allochthonous inputs and elevated N/P ratio scenarios during BCE restoration. Allochthonous-dominated BCEs thus have the capacity to enhance refractory and mineral bound organic matter accumulation. Protection and restoration of such BCEs will provide long-term mitigating benefits against sea level rise and greenhouse gas emissions.
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Affiliation(s)
- Yuan Li
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS); Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai 264003, P. R. China
| | - Chuancheng Fu
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences (CAS), Nanjing 210008, P. R. China
| | - Jian Hu
- Key Laboratory of Coastal Salt Marsh Ecosystems and Resources, Ministry of Natural Resources, Jiangsu Geological Bureau, Nanjing 210018, P. R. China
| | - Lin Zeng
- School of Resources and Environmental Engineering, Ludong University, Yantai 264025, P. R. China
| | - Chen Tu
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS); Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai 264003, P. R. China
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences (CAS), Nanjing 210008, P. R. China
| | - Yongming Luo
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS); Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai 264003, P. R. China
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences (CAS), Nanjing 210008, P. R. China
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22
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Das N, Chakrabortty R, Pal SC, Mondal A, Mandal S. A novel coupled framework for detecting hotspots of methane emission from the vulnerable Indian Sundarban mangrove ecosystem using data-driven models. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 866:161319. [PMID: 36608827 DOI: 10.1016/j.scitotenv.2022.161319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 12/21/2022] [Accepted: 12/28/2022] [Indexed: 06/17/2023]
Abstract
Coastal mangroves have been lost to deforestation for anthropogenic activities such as agriculture over the past two decades. The genesis of methane (CH4), a significant greenhouse gas (GHG) with a high potential for global warming, occurs through these mangrove beds. The mangrove forests in the Indian Sundarban deltaic region were studied for pre-monsoonal and post-monsoonal variations of CH4 emission. Considering the importance of CH4 emission, a process-based spatiotemporal (PBS) and an analytical neural network (ANN) model were proposed and used to estimate the amount of CH4 emission from different land use land cover classes (LULC) of mangroves. The field work was performed in 2020, and gas samples of various LULC were directly collected from the mangrove bed using the enclosed box chamber method. Historical climatic data (1960-1989) were used to predict future climate scenarios and associated CH4 emissions. The analysis and estimation activities were carried out utilizing satellite images from the pre-monsoonal and post-monsoonal seasons of the same year. The study revealed that pre-monsoonal CH4 emission was higher in the south-west and northern parts of the deforested mangrove of the Indian Sundarban. A sensitivity study of the anticipated models was conducted using a variety of environmental input parameters and related main field observations. The measured precision area under curve of receiver operating characteristics was 0.753 for PBS and 0.718 for ANN models, respectively. The temperature factor (Tf) was the most crucial variable for CH4 emissions. Based on the PBS model with coupled model intercomparison project-6 temperature data, a global circulation model was run to predict increasing CH4 emissions up to 2100. The model revealed that the agricultural lands were the prime emitters of CH4 in the Sundarban mangrove ecosystem.
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Affiliation(s)
- Nilanjan Das
- Ecology and Environmental Modelling Laboratory, Department of Environmental Science, The University of Burdwan, Purba Bardhaman, 713104, West Bengal, India
| | - Rabin Chakrabortty
- Department of Geography, The University of Burdwan, Purba Bardhaman, 713104, West Bengal, India
| | - Subodh Chandra Pal
- Department of Geography, The University of Burdwan, Purba Bardhaman, 713104, West Bengal, India
| | - Ayan Mondal
- Ecology and Environmental Modelling Laboratory, Department of Environmental Science, The University of Burdwan, Purba Bardhaman, 713104, West Bengal, India
| | - Sudipto Mandal
- Ecology and Environmental Modelling Laboratory, Department of Environmental Science, The University of Burdwan, Purba Bardhaman, 713104, West Bengal, India.
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23
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Roth F, Broman E, Sun X, Bonaglia S, Nascimento F, Prytherch J, Brüchert V, Lundevall Zara M, Brunberg M, Geibel MC, Humborg C, Norkko A. Methane emissions offset atmospheric carbon dioxide uptake in coastal macroalgae, mixed vegetation and sediment ecosystems. Nat Commun 2023; 14:42. [PMID: 36596795 PMCID: PMC9810657 DOI: 10.1038/s41467-022-35673-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Accepted: 12/16/2022] [Indexed: 01/05/2023] Open
Abstract
Coastal ecosystems can efficiently remove carbon dioxide (CO2) from the atmosphere and are thus promoted for nature-based climate change mitigation. Natural methane (CH4) emissions from these ecosystems may counterbalance atmospheric CO2 uptake. Still, knowledge of mechanisms sustaining such CH4 emissions and their contribution to net radiative forcing remains scarce for globally prevalent macroalgae, mixed vegetation, and surrounding depositional sediment habitats. Here we show that these habitats emit CH4 in the range of 0.1 - 2.9 mg CH4 m-2 d-1 to the atmosphere, revealing in situ CH4 emissions from macroalgae that were sustained by divergent methanogenic archaea in anoxic microsites. Over an annual cycle, CO2-equivalent CH4 emissions offset 28 and 35% of the carbon sink capacity attributed to atmospheric CO2 uptake in the macroalgae and mixed vegetation habitats, respectively, and augment net CO2 release of unvegetated sediments by 57%. Accounting for CH4 alongside CO2 sea-air fluxes and identifying the mechanisms controlling these emissions is crucial to constrain the potential of coastal ecosystems as net atmospheric carbon sinks and develop informed climate mitigation strategies.
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Affiliation(s)
- Florian Roth
- Baltic Sea Centre, Stockholm University, Stockholm, Sweden. .,Tvärminne Zoological Station, Faculty of Biological and Environmental Sciences, University of Helsinki, Hanko, Finland.
| | - Elias Broman
- Baltic Sea Centre, Stockholm University, Stockholm, Sweden.,Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | - Xiaole Sun
- Baltic Sea Centre, Stockholm University, Stockholm, Sweden.,Center of Deep Sea Research, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
| | - Stefano Bonaglia
- Department of Marine Sciences, University of Gothenburg, Gothenburg, Sweden
| | - Francisco Nascimento
- Baltic Sea Centre, Stockholm University, Stockholm, Sweden.,Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | - John Prytherch
- Department of Meteorology, Stockholm University, Stockholm, Sweden
| | - Volker Brüchert
- Department of Geological Sciences, Stockholm University, Stockholm, Sweden.,Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden
| | | | - Märta Brunberg
- Tvärminne Zoological Station, Faculty of Biological and Environmental Sciences, University of Helsinki, Hanko, Finland
| | - Marc C Geibel
- Baltic Sea Centre, Stockholm University, Stockholm, Sweden
| | - Christoph Humborg
- Baltic Sea Centre, Stockholm University, Stockholm, Sweden.,Tvärminne Zoological Station, Faculty of Biological and Environmental Sciences, University of Helsinki, Hanko, Finland
| | - Alf Norkko
- Baltic Sea Centre, Stockholm University, Stockholm, Sweden.,Tvärminne Zoological Station, Faculty of Biological and Environmental Sciences, University of Helsinki, Hanko, Finland
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24
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Du H, Pan J, Zou D, Huang Y, Liu Y, Li M. Microbial active functional modules derived from network analysis and metabolic interactions decipher the complex microbiome assembly in mangrove sediments. MICROBIOME 2022; 10:224. [PMID: 36510268 PMCID: PMC9746113 DOI: 10.1186/s40168-022-01421-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 11/09/2022] [Indexed: 05/24/2023]
Abstract
BACKGROUND The metabolic interactions of microbes significantly affect the assembly of microbial communities that play important roles in biogeochemical processes. However, most interspecies interactions between microorganisms in natural communities remain unknown, leading to a poor understanding of community assembly mechanisms. RESULTS Here, we used a genome-scale metabolic modeling-based approach to explore the potential interactions among bacteria and archaea in mangrove sediments. More than half of the assembled microbial species ([Formula: see text]) combined about 3000 pairwise metabolic interaction relationship with high potential. The examples of predicted interactions are consistent with the implications of studies based on microbial enrichment/culture, indicating the feasibility of our strategy for extracting diverse potential interactions from complex interspecies networks. Moreover, a substantial number of previously unknown microbial metabolic interactions were also predicted. We proposed a concept of microbial active functional module (mAFM), defined as a consortium constituted by a group of microbes possessing relatively high metabolic interactions via which they can actively realize certain dominant functions in element transformations. Based on the metabolic interactions and the transcript distribution of microorganisms, five mAFMs distributed in different layers of the sediments were identified. The whole group of mAFMs covered most of the principal pathways in the cycle of carbon, nitrogen, and sulfur, while each module possessed divergently dominant functions. According to thinctiis diston, we inferred that the mAFMs participated in the element cycles via their intra-cycle and the inter-exchange among them and the sediments. CONCLUSIONS The results of this study greatly expanded interaction potential of microbes in mangrove sediments, which could provide supports for prospective mutualistic system construction and microbial enrichment culture. Furthermore, the mAFMs can help to extract valuable microbial metabolic interactions from the whole community and to profile the functioning of the microbial community that promote biogeochemical cycling in mangrove sediments. Video Abstract.
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Affiliation(s)
- Huan Du
- Archaeal Biology Center, Institute for Advanced Study, Shenzhen University, Shenzhen, 518060 China
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, 518060 China
| | - Jie Pan
- Archaeal Biology Center, Institute for Advanced Study, Shenzhen University, Shenzhen, 518060 China
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, 518060 China
| | - Dayu Zou
- Archaeal Biology Center, Institute for Advanced Study, Shenzhen University, Shenzhen, 518060 China
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, 518060 China
| | - Yuhan Huang
- Archaeal Biology Center, Institute for Advanced Study, Shenzhen University, Shenzhen, 518060 China
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, 518060 China
| | - Yang Liu
- Archaeal Biology Center, Institute for Advanced Study, Shenzhen University, Shenzhen, 518060 China
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, 518060 China
| | - Meng Li
- Archaeal Biology Center, Institute for Advanced Study, Shenzhen University, Shenzhen, 518060 China
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, 518060 China
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25
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Barroso GC, Abril G, Machado W, Abuchacra RC, Peixoto RB, Bernardes M, Marques GS, Sanders CJ, Oliveira GB, Oliveira Filho SR, Amora-Nogueira L, Marotta H. Linking eutrophication to carbon dioxide and methane emissions from exposed mangrove soils along an urban gradient. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 850:157988. [PMID: 35963403 DOI: 10.1016/j.scitotenv.2022.157988] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Revised: 07/22/2022] [Accepted: 08/08/2022] [Indexed: 06/15/2023]
Abstract
Mangroves are one of the most important but threatened blue carbon ecosystems globally. Rapid urban growth has resulted in nutrient inputs and subsequent coastal eutrophication, associated with an enrichment in organic matter (OM) from algal and sewage sources and substantial changes in greenhouse gas (GHG) emissions. However, the effects of nitrogen (N) and phosphorus (P) enrichment on mangrove soil OM composition and GHG emissions, such as methane (CH4) and carbon dioxide (CO2), are still poorly understood. Here, we aim to evaluate the relationships between CO2 and CH4 efflux with OM composition in exposed soils from three mangrove areas along watersheds with different urbanization levels (Rio de Janeiro State, Brazil). To assess spatial (lower vs. upper intertidal zones) and seasonal (summer vs. winter) variability, we measured soil-air CO2 and CH4 fluxes at low spring tide, analyzing elementary (C, N, and P), isotopic (δ13C and δ15N), and the molecular (n-alkanes and sterols) composition of surface soil OM. A general trend of OM composition was found with increasing urban influence, with higher δ15N (proxy of anthropogenic N enrichment), less negative δ13C, more short-chain n-alkanes, lower C:N ratio (proxies of algal biomass), and higher epicoprostanol content (proxies of sewage-derived OM). The CO2 efflux from exposed soils increased greatly in median (25/75 % interquartile range) from 4.6 (2.9/8.3) to 24.0 (21.5/32.7) mmol m-2 h-1 from more pristine to more urbanized watersheds, independent of intertidal zone and seasonality. The CO2 fluxes at the most eutrophicated site were among the highest reported worldwide for mangrove soils. Conversely, CH4 emissions were relatively low (three orders of magnitude lower than CO2 fluxes), with high peaks in the lower intertidal zone during the rainy summer. Thus, our findings demonstrate the influence of coastal eutrophication on global warming potentials related to enhanced heterotrophic remineralization of blue carbon within mangrove soils.
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Affiliation(s)
- Glenda C Barroso
- Graduate Program in Geosciences (Environmental Geochemistry), Fluminense Federal University (UFF), Outeiro São João Baptista, s/n, 24020-007 Niterói, Brazil; Ecosystems and Global Change Laboratory (LEMG-UFF)/Brazilian Ocean Acidification Network (BrOA), International Laboratory of Global Change (LINCGlobal), Biomass and Water Management Research Center (NAB-UFF), Fluminense Federal University (UFF), Av. Edmundo March, s/n°, Niterói, RJ 24210-310, Brazil
| | - Gwenaël Abril
- Graduate Program in Geosciences (Environmental Geochemistry), Fluminense Federal University (UFF), Outeiro São João Baptista, s/n, 24020-007 Niterói, Brazil; Laboratoire de Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), FRE 2020, Muséum National d'Histoire Naturelle, CNRS, IRD, SU, UCN, UA, Paris, France
| | - Wilson Machado
- Graduate Program in Geosciences (Environmental Geochemistry), Fluminense Federal University (UFF), Outeiro São João Baptista, s/n, 24020-007 Niterói, Brazil; Ecosystems and Global Change Laboratory (LEMG-UFF)/Brazilian Ocean Acidification Network (BrOA), International Laboratory of Global Change (LINCGlobal), Biomass and Water Management Research Center (NAB-UFF), Fluminense Federal University (UFF), Av. Edmundo March, s/n°, Niterói, RJ 24210-310, Brazil
| | - Rodrigo C Abuchacra
- Ecosystems and Global Change Laboratory (LEMG-UFF)/Brazilian Ocean Acidification Network (BrOA), International Laboratory of Global Change (LINCGlobal), Biomass and Water Management Research Center (NAB-UFF), Fluminense Federal University (UFF), Av. Edmundo March, s/n°, Niterói, RJ 24210-310, Brazil; Department of Geography, Graduate Program in Geography, State University of Rio de Janeiro (UERJ/FFP), Rua Dr. Francisco Portela, 1470 São Gonçalo, 24435-005 Rio de Janeiro, Brazil
| | - Roberta B Peixoto
- Graduate Program in Geosciences (Environmental Geochemistry), Fluminense Federal University (UFF), Outeiro São João Baptista, s/n, 24020-007 Niterói, Brazil; Ecosystems and Global Change Laboratory (LEMG-UFF)/Brazilian Ocean Acidification Network (BrOA), International Laboratory of Global Change (LINCGlobal), Biomass and Water Management Research Center (NAB-UFF), Fluminense Federal University (UFF), Av. Edmundo March, s/n°, Niterói, RJ 24210-310, Brazil
| | - Marcelo Bernardes
- Graduate Program in Geosciences (Environmental Geochemistry), Fluminense Federal University (UFF), Outeiro São João Baptista, s/n, 24020-007 Niterói, Brazil
| | - Gabriela S Marques
- Graduate Program in Geosciences (Environmental Geochemistry), Fluminense Federal University (UFF), Outeiro São João Baptista, s/n, 24020-007 Niterói, Brazil
| | - Christian J Sanders
- National Marine Science Centre, Faculty of Science and Engineering, Southern Cross University, Coffs Harbour, NSW 2540, Australia
| | - Gabriela B Oliveira
- Graduate Program in Geosciences (Environmental Geochemistry), Fluminense Federal University (UFF), Outeiro São João Baptista, s/n, 24020-007 Niterói, Brazil; Ecosystems and Global Change Laboratory (LEMG-UFF)/Brazilian Ocean Acidification Network (BrOA), International Laboratory of Global Change (LINCGlobal), Biomass and Water Management Research Center (NAB-UFF), Fluminense Federal University (UFF), Av. Edmundo March, s/n°, Niterói, RJ 24210-310, Brazil
| | - Silvio R Oliveira Filho
- Physical Geography Laboratory (LAGEF-UFF), Department of Geography, Graduate Program in Geography, Fluminense Federal University (UFF), Av. Gal. Milton Tavares de Souza, s/n°, Niterói, RJ 24210-346, Brazil
| | - Leonardo Amora-Nogueira
- Graduate Program in Geosciences (Environmental Geochemistry), Fluminense Federal University (UFF), Outeiro São João Baptista, s/n, 24020-007 Niterói, Brazil; Ecosystems and Global Change Laboratory (LEMG-UFF)/Brazilian Ocean Acidification Network (BrOA), International Laboratory of Global Change (LINCGlobal), Biomass and Water Management Research Center (NAB-UFF), Fluminense Federal University (UFF), Av. Edmundo March, s/n°, Niterói, RJ 24210-310, Brazil; Physical Geography Laboratory (LAGEF-UFF), Department of Geography, Graduate Program in Geography, Fluminense Federal University (UFF), Av. Gal. Milton Tavares de Souza, s/n°, Niterói, RJ 24210-346, Brazil
| | - Humberto Marotta
- Graduate Program in Geosciences (Environmental Geochemistry), Fluminense Federal University (UFF), Outeiro São João Baptista, s/n, 24020-007 Niterói, Brazil; Ecosystems and Global Change Laboratory (LEMG-UFF)/Brazilian Ocean Acidification Network (BrOA), International Laboratory of Global Change (LINCGlobal), Biomass and Water Management Research Center (NAB-UFF), Fluminense Federal University (UFF), Av. Edmundo March, s/n°, Niterói, RJ 24210-310, Brazil; Physical Geography Laboratory (LAGEF-UFF), Department of Geography, Graduate Program in Geography, Fluminense Federal University (UFF), Av. Gal. Milton Tavares de Souza, s/n°, Niterói, RJ 24210-346, Brazil.
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Gacutan J, Lal K, Herath S, Lantz C, Taylor M, Milligan B. Using Ocean Accounting towards an integrated assessment of ecosystem services and benefits within a coastal lake. ONE ECOSYSTEM 2022. [DOI: 10.3897/oneeco.7.e81855] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Coasts lie at the interface between terrestrial and marine environments, where complex interrelationships and feedbacks between environmental, social and economic factors provide a challenge for decision-making. The knowledge and data needed to link and measure these multiple domains are often highly fragmented and incoherent. Ocean Accounting provides a means to organise relevant ocean data into a common framework, grounded in existing international statistical standards for national and environmental-economic accounting. Here, we test Ocean Accounting within Lake Illawarra, New South Wales (Australia), compiling accounts for the years between 2010 and 2020, inclusive, to measure the extent of coastal vegetation (mangrove, tidal marsh and seagrass) and associated ecosystem services flows (climate change mitigation, eutrophication mitigation) in physical and monetary terms and associated production and employment within sectors of the ocean economy. The accounts show an increase in mangroves by 2 ha and a decrease in seagrass of 80 ha. A net increase was observed in the amount of carbon, nitrogen and phosphorus sequestered across coastal vegetation, due to the expansion of mangroves. Alongside changes in ecosystem extent, a 2-fold increase in full-time ocean-related employment was observed. Fisheries catch also showed significant variation over the 10-year period, where dependencies were observed between commercial species with seagrass and tidal marsh. The relationships and measures derived from accounts provide a cohesive and integrated understanding to provide information for the management and standardised ecosystem service assessments.
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Bernardino AF, Mazzuco ACA, Souza FM, Santos TMT, Sanders CJ, Massone CG, Costa RF, Silva AEB, Ferreira TO, Nóbrega GN, Silva TSF, Kauffman JB. The novel mangrove environment and composition of the Amazon Delta. Curr Biol 2022; 32:3636-3640.e2. [PMID: 35863350 DOI: 10.1016/j.cub.2022.06.071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 06/21/2022] [Accepted: 06/22/2022] [Indexed: 11/25/2022]
Abstract
Both freshwater floodplain (várzeas and igapós) forests and brackish-saline mangroves are abundant and well-described ecosystems in Brazil.1 However, an interesting and unique wetland forest exists in the Amazon Delta where extensive mangroves occur in essentially freshwater tidal environments. Unlike the floodplain forests found upriver, the hydrology of these ecosystems is driven largely by large macro-tides of 4-8 m coupled with the significant freshwater discharge from the Amazon River. We explored these mangroves on the Amazon Delta (00°52' N to 01°41' N) and found surface water salinity to be consistently <5; soil pore water salinity in these mangrove forests ranged from 0 nearest the Amazon mouth to only 5-11 at the coastal margins to the north (01°41' N, 49°55' W). We also recorded a unique mix of mangrove-obligate (Avicennia sp., Rhizophora mangle) and facultative-wetland species (Mauritia flexuosa, Pterocarpus sp.) dominating these forests. This unique mix of plant species and soil porewater chemistry exists even along the coastal strands and active coastlines of the Atlantic Ocean. Part of these unique mangroves have escaped current global satellite mapping efforts, and we estimate that they may add over 180 km2 (20% increase in mangrove area) within the Amazon Delta. Despite having a unique structure and function, these freshwater-brackish ecosystems likely provide similar ecosystem services to most mangroves worldwide, such as sequestering large quantities of organic carbon, protection of shoreline ecosystems from erosion, and habitats to many terrestrial and aquatic species (monkeys, birds, crabs, and fish).
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Affiliation(s)
- Angelo F Bernardino
- Departamento de Oceanografia, Universidade Federal do Espirito Santo, Av. Fernando Ferrari, 514, Vitória, Espirito Santo 29075910, Brazil.
| | - Ana Carolina A Mazzuco
- Departamento de Oceanografia, Universidade Federal do Espirito Santo, Av. Fernando Ferrari, 514, Vitória, Espirito Santo 29075910, Brazil
| | - Fernanda M Souza
- Departamento de Oceanografia, Universidade Federal do Espirito Santo, Av. Fernando Ferrari, 514, Vitória, Espirito Santo 29075910, Brazil
| | - Thuareag M T Santos
- Departamento de Oceanografia, Universidade Federal do Espirito Santo, Av. Fernando Ferrari, 514, Vitória, Espirito Santo 29075910, Brazil
| | - Christian J Sanders
- National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW 2450, Australia
| | - Carlos G Massone
- Departamento de Química, PUC-Rio, Rua Marquês de São Vicente, 225, Gávea, Rio de Janeiro 22451-900, Brazil
| | - Rodolfo F Costa
- Departamento de Ciência do Solo, Universidade de São Paulo, Av. Pádua Dias, 11, Piracicaba 13418-900, Brazil
| | - Antônio Elves B Silva
- Departamento de Ciência do Solo, Universidade de São Paulo, Av. Pádua Dias, 11, Piracicaba 13418-900, Brazil
| | - Tiago O Ferreira
- Departamento de Ciência do Solo, Universidade de São Paulo, Av. Pádua Dias, 11, Piracicaba 13418-900, Brazil
| | - Gabriel N Nóbrega
- Departamento de Geoquímica, Universidade Federal Fluminense, Outeiro São João Batista, S/N, Centro, Niterói 24020-141, Brazil
| | - Thiago S F Silva
- Faculty of Natural Sciences, University of Stirling, Stirling FK9 4LA, Scotland, UK
| | - J Boone Kauffman
- Department of Fisheries, Wildlife, and Conservation Sciences, Oregon State University, 104 Nash Hall, Corvallis, OR 97331, USA
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Roth F, Sun X, Geibel MC, Prytherch J, Brüchert V, Bonaglia S, Broman E, Nascimento F, Norkko A, Humborg C. High spatiotemporal variability of methane concentrations challenges estimates of emissions across vegetated coastal ecosystems. GLOBAL CHANGE BIOLOGY 2022; 28:4308-4322. [PMID: 35340089 PMCID: PMC9540812 DOI: 10.1111/gcb.16177] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 03/18/2022] [Accepted: 03/21/2022] [Indexed: 06/14/2023]
Abstract
Coastal methane (CH4 ) emissions dominate the global ocean CH4 budget and can offset the "blue carbon" storage capacity of vegetated coastal ecosystems. However, current estimates lack systematic, high-resolution, and long-term data from these intrinsically heterogeneous environments, making coastal budgets sensitive to statistical assumptions and uncertainties. Using continuous CH4 concentrations, δ13 C-CH4 values, and CH4 sea-air fluxes across four seasons in three globally pervasive coastal habitats, we show that the CH4 distribution is spatially patchy over meter-scales and highly variable in time. Areas with mixed vegetation, macroalgae, and their surrounding sediments exhibited a spatiotemporal variability of surface water CH4 concentrations ranging two orders of magnitude (i.e., 6-460 nM CH4 ) with habitat-specific seasonal and diurnal patterns. We observed (1) δ13 C-CH4 signatures that revealed habitat-specific CH4 production and consumption pathways, (2) daily peak concentration events that could change >100% within hours across all habitats, and (3) a high thermal sensitivity of the CH4 distribution signified by apparent activation energies of ~1 eV that drove seasonal changes. Bootstrapping simulations show that scaling the CH4 distribution from few samples involves large errors, and that ~50 concentration samples per day are needed to resolve the scale and drivers of the natural variability and improve the certainty of flux calculations by up to 70%. Finally, we identify northern temperate coastal habitats with mixed vegetation and macroalgae as understudied but seasonally relevant atmospheric CH4 sources (i.e., releasing ≥ 100 μmol CH4 m-2 day-1 in summer). Due to the large spatial and temporal heterogeneity of coastal environments, high-resolution measurements will improve the reliability of CH4 estimates and confine the habitat-specific contribution to regional and global CH4 budgets.
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Affiliation(s)
- Florian Roth
- Baltic Sea CentreStockholm UniversityStockholmSweden
- Tvärminne Zoological StationUniversity of HelsinkiHankoFinland
| | - Xiaole Sun
- Baltic Sea CentreStockholm UniversityStockholmSweden
- Center of Deep Sea ResearchInstitute of OceanologyChinese Academy of SciencesQingdaoChina
| | | | - John Prytherch
- Department of MeteorologyStockholm UniversityStockholmSweden
| | - Volker Brüchert
- Department of Geological SciencesStockholm UniversityStockholmSweden
- Bolin Centre for Climate ResearchStockholm UniversityStockholmSweden
| | - Stefano Bonaglia
- Department of Marine SciencesUniversity of GothenburgGothenburgSweden
| | - Elias Broman
- Baltic Sea CentreStockholm UniversityStockholmSweden
- Department of EcologyEnvironment and Plant SciencesStockholm UniversityStockholmSweden
| | - Francisco Nascimento
- Baltic Sea CentreStockholm UniversityStockholmSweden
- Department of EcologyEnvironment and Plant SciencesStockholm UniversityStockholmSweden
| | - Alf Norkko
- Baltic Sea CentreStockholm UniversityStockholmSweden
- Tvärminne Zoological StationUniversity of HelsinkiHankoFinland
| | - Christoph Humborg
- Baltic Sea CentreStockholm UniversityStockholmSweden
- Tvärminne Zoological StationUniversity of HelsinkiHankoFinland
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29
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Liu C, Liu G, Casazza M, Yan N, Xu L, Hao Y, Franzese PP, Yang Z. Current Status and Potential Assessment of China's Ocean Carbon Sinks. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:6584-6595. [PMID: 35507754 DOI: 10.1021/acs.est.1c08106] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The role of ocean carbon sinks in global climate change mitigation and carbon neutrality is still affected by lack of research. Aiming at overcoming the present limitations, a comprehensive and holistic framework and accounting method of ocean carbon sink evaluation are proposed in this study, which consider both carbon sink types and their characteristic carbon storage cycle timescales. The results show that (1) China's total ocean carbon sink is 69.83-106.46 Tg C/year, among which the mariculture, coastal wetlands, and offshore carbon sinks are 2.27-4.06, 2.86-5.85, and 64.70-96.55 Tg C/year, respectively; (2) ocean-based solutions such as coastal protection and restoration, mariculture development, ocean alkalization, ocean fertilization, and marine bioenergy with carbon capture and storage have substantial mitigation potential, but further investigation is required before large-scale deployment; (3) although China's ocean carbon sinks only counterbalanced 3.27-4.99% of its fossil fuel emissions, their tremendous enhancing potential and specific advantages cannot be ignored, and enhancing measures must be taken according to regional characteristics; (4) some uncertainties and limitations still exist, and problems such as double counting, carbon sink offset, and so forth need to be further considered. In a word, this study provides a basis for the development of ocean-based solutions on closing climate mitigation gaps.
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Affiliation(s)
- Chang Liu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Gengyuan Liu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, China
- Beijing Engineering Research Center for Watershed Environmental Restoration & Integrated Ecological Regulation, Beijing 100875, China
| | - Marco Casazza
- Department of Medicine, Surgery and Odontology "Scuola Medica Salernitana", University of Salerno, Baronissi, Salerno 84081, Italy
| | - Ningyu Yan
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Linyu Xu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, China
- Beijing Engineering Research Center for Watershed Environmental Restoration & Integrated Ecological Regulation, Beijing 100875, China
| | - Yan Hao
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, China
- Beijing Engineering Research Center for Watershed Environmental Restoration & Integrated Ecological Regulation, Beijing 100875, China
| | - Pier Paolo Franzese
- Laboratory of Ecodynamics and Sustainable Development, Department of Science and Technology, Parthenope University of Naples, Centro Direzionale─Isola C4, Napoli 80143, Italy
| | - Zhifeng Yang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, China
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou 510006, China
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30
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Clemente CCC, Paresque K, Santos PJP. Impact of plastic bags on the benthic system of a tropical estuary: An experimental study. MARINE POLLUTION BULLETIN 2022; 178:113623. [PMID: 35367696 DOI: 10.1016/j.marpolbul.2022.113623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 03/23/2022] [Accepted: 03/24/2022] [Indexed: 06/14/2023]
Abstract
Plastic bags are among the most discarded waste items as they are generally only used once and are often improperly eliminated and transported by rivers and estuaries to the ocean. We developed an experimental design to mimic the effect of plastic bag deposition in a tropical estuary and investigated its short-term impact on benthic community structure. We observed a significant influence of the presence of plastic bags on the abundance, richness and diversity of benthic fauna after an eight-week exposure period. Plastic bags acted as a barrier and interfered in processes that occur at the water-sediment interface, such as organic matter and silt-clay deposition. Our results indicate that plastic bags, in addition to directly affecting benthic fauna, may alter processes such as carbon burying, known as "blue carbon", thus making its storage in the sediment more difficult.
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Affiliation(s)
- Caroline C C Clemente
- Departamento de Zoologia, Centro de Biociências, Universidade Federal de Pernambuco, Av. Prof. Moraes Rêgo s/n, Cidade Universitária, 50670-420 Recife, PE, Brazil; Programa de Pós-Graduação em Oceanografia (PPGO), Centro de Tecnologia e Geociências, Universidade Federal de Pernambuco, Brazil; Programa de Pós-Graduação em Biologia Animal (PPGBA), Centro de Biociências, Universidade Federal de Pernambuco, Brazil.
| | | | - Paulo J P Santos
- Departamento de Zoologia, Centro de Biociências, Universidade Federal de Pernambuco, Av. Prof. Moraes Rêgo s/n, Cidade Universitária, 50670-420 Recife, PE, Brazil
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31
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Palit K, Rath S, Chatterjee S, Das S. Microbial diversity and ecological interactions of microorganisms in the mangrove ecosystem: Threats, vulnerability, and adaptations. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:32467-32512. [PMID: 35182344 DOI: 10.1007/s11356-022-19048-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Accepted: 01/31/2022] [Indexed: 06/14/2023]
Abstract
Mangroves are among the world's most productive ecosystems and a part of the "blue carbon" sink. They act as a connection between the terrestrial and marine ecosystems, providing habitat to countless organisms. Among these, microorganisms (e.g., bacteria, archaea, fungi, phytoplankton, and protozoa) play a crucial role in this ecosystem. Microbial cycling of major nutrients (carbon, nitrogen, phosphorus, and sulfur) helps maintain the high productivity of this ecosystem. However, mangrove ecosystems are being disturbed by the increasing concentration of greenhouse gases within the atmosphere. Both the anthropogenic and natural factors contribute to the upsurge of greenhouse gas concentration, resulting in global warming. Changing climate due to global warming and the increasing rate of human interferences such as pollution and deforestation are significant concerns for the mangrove ecosystem. Mangroves are susceptible to such environmental perturbations. Global warming, human interventions, and its consequences are destroying the ecosystem, and the dreadful impacts are experienced worldwide. Therefore, the conservation of mangrove ecosystems is necessary for protecting them from the changing environment-a step toward preserving the globe for better living. This review highlights the importance of mangroves and their microbial components on a global scale and the degree of vulnerability of the ecosystems toward anthropic and climate change factors. The future scenario of the mangrove ecosystem and the resilience of plants and microbes have also been discussed.
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Affiliation(s)
- Krishna Palit
- Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology, Rourkela, 769008, Odisha, India
| | - Sonalin Rath
- Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology, Rourkela, 769008, Odisha, India
| | - Shreosi Chatterjee
- Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology, Rourkela, 769008, Odisha, India
| | - Surajit Das
- Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology, Rourkela, 769008, Odisha, India.
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32
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Gao G, Beardall J, Jin P, Gao L, Xie S, Gao K. A review of existing and potential blue carbon contributions to climate change mitigation in the Anthropocene. J Appl Ecol 2022. [DOI: 10.1111/1365-2664.14173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Guang Gao
- State Key Laboratory of Marine Environmental Science & College of Ocean and Earth Sciences Xiamen University Xiamen 361005 China
| | - John Beardall
- State Key Laboratory of Marine Environmental Science & College of Ocean and Earth Sciences Xiamen University Xiamen 361005 China
- School of Biological Sciences Monash University Clayton, VI 3800 Australia
| | - Peng Jin
- School of Environmental Science and Engineering Guangzhou University Guangzhou 510006 China
| | - Lin Gao
- State Key Laboratory of Marine Environmental Science & College of Ocean and Earth Sciences Xiamen University Xiamen 361005 China
| | - Shuyu Xie
- State Key Laboratory of Marine Environmental Science & College of Ocean and Earth Sciences Xiamen University Xiamen 361005 China
| | - Kunshan Gao
- State Key Laboratory of Marine Environmental Science & College of Ocean and Earth Sciences Xiamen University Xiamen 361005 China
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33
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Carnell PE, Palacios MM, Waryszak P, Trevathan-Tackett SM, Masqué P, Macreadie PI. Blue carbon drawdown by restored mangrove forests improves with age. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 306:114301. [PMID: 35032938 DOI: 10.1016/j.jenvman.2021.114301] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 12/05/2021] [Accepted: 12/12/2021] [Indexed: 06/14/2023]
Abstract
The restoration of blue carbon ecosystems, such as mangrove forests, is increasingly used as a management tool to mitigate climate change by removing and sequestering atmospheric carbon in the ground. However, estimates of carbon-offset potential are currently based on data from natural mangrove forests, potentially leading to overestimating the carbon-offset potential from restored mangroves. Here, in the first study of its kind, we utilise 210Pb sediment age-dating techniques and greenhouse gas flux measures to estimate blue carbon additionality in restored mangrove forests, ranging from 13 to 35 years old. As expected, mangrove age had a significant effect on carbon additionality and carbon accretion rate, with the older mangrove stands (17 and 35 years old) holding double the total carbon stocks (aboveground + soil stocks; ∼115 tonnes C ha-1) and double the soil sequestration rates (∼3 tonnes C ha-1 yr-1) than the youngest mangrove stand (13 years old). Although soil carbon stocks increased with mangrove age, the aboveground plant stocks were highest in the 17-year-old stand. Mangrove age also had a significant effect on soil carbon fluxes, with the older mangroves (≥17 years) releasing one-fourth of the CH4 emissions, but double the CO2 flux compared to young stands. Our study suggests that the carbon sink capacity of restored mangrove forests increases with age, but stabilises once they mature (e.g., >17 years). This means that by using carbon sequestration and emissions from natural forests, mangrove restoration projects may be overestimating their carbon sequestration potential.
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Affiliation(s)
- Paul E Carnell
- Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Victoria, 3125, Australia.
| | - Maria M Palacios
- Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Victoria, 3125, Australia
| | - Paweł Waryszak
- Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Victoria, 3125, Australia
| | - Stacey M Trevathan-Tackett
- Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Victoria, 3125, Australia
| | - Pere Masqué
- International Atomic Energy Agency, 98000, Principality of Monaco, Monaco; School of Science and Centre for Marine Ecosystems Research, Edith Cowan University, Joondalup, Western Australia, 6027, Australia; Institut de Ciència i Tecnologia Ambientals & Departament de Física, Universitat Autònoma de Barcelona, Bellaterra, 08193, Barcelona, Spain
| | - Peter I Macreadie
- Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Victoria, 3125, Australia
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Zhao X, Wang C, Li T, Zhang C, Fan X, Zhang Q, Zhang Q, Chen X, Zou X, Shen C, Tang Y, Qin Z. Net CO 2 and CH 4 emissions from restored mangrove wetland: New insights based on a case study in estuary of the Pearl River, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 811:151619. [PMID: 34780816 DOI: 10.1016/j.scitotenv.2021.151619] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 11/05/2021] [Accepted: 11/07/2021] [Indexed: 06/13/2023]
Abstract
Mangroves have the potential to affect climate via C sequestration and methane (CH4) emissions. With half of the world's mangroves lost during the 20th century, mangrove restoration in mitigating greenhouse gases has been increasingly recognized. However, the carbon exchanges during restored processes still remain large uncertain. In this study, we analyzed the temporal variations of CO2 and CH4 fluxes and their environmental controls during 2019 and 2020 based on a closed-path eddy covariance (EC) system in a 12-year restored subtropical mangrove wetland, in estuary of the Pearl River, southeastern China. We also estimated the CO2 and CH4 fluxes and their climate effect from the beginning of restoration by Random Forest algorithm (RF). The EC observations showed that annually the 12-year restored mangrove acted as CO2 and CH4 sources, with net CO2 ecosystem exchange (NEE) of 82-175 gC·m- 2·a-1 and CH4 fluxes of 24.7-26.3 gC·m-2·a-1. Low vegetation gross primary productivity (GPP) and high ecosystem respiration (Re) caused net CO2 emissions in the mangroves. The estimation by RF indicated that the mangroves were always a CO2 source after the beginning of restoration, but the annual NEE was linearly decreased from 233 to 131 gC·m-2·a-1 from 2008 to 2020. The annual CH4 emissions continually increased from 19.0 to 25.8 gC·m-2·a-1 after restoration. As a result, the restored mangrove had a positive effect on climate warming, with increased GWP from 1276 to 1386 g CO2-eq ·m-2·a-1 from 2008 to 2020. This is mainly due to lower GPP and higher Re by young restored mangroves, large water area as well as low salinity induced strong CH4 emissions. Our results indicate new sights that young restored mangrove with large area of water surface may act as carbon sources. However, the long-term climate and ecosystem benefits due to mangrove restoration should not be ignored in future.
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Affiliation(s)
- Xiaosong Zhao
- Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
| | - Chunlin Wang
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China; Guangzhou Climate and Agrometeorology Center, Guangzhou 510080, China
| | - Tingting Li
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.
| | - Chengyi Zhang
- National Climate Center, China Meteorological Administration, Beijing 100081, China.
| | - Xingwang Fan
- Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Qing Zhang
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - Qiang Zhang
- National Climate Center, China Meteorological Administration, Beijing 100081, China
| | - Xianyan Chen
- National Climate Center, China Meteorological Administration, Beijing 100081, China
| | - Xukai Zou
- National Climate Center, China Meteorological Administration, Beijing 100081, China
| | - Chong Shen
- Guangzhou Climate and Agrometeorology Center, Guangzhou 510080, China
| | - Yuqi Tang
- School of Atmospheric Sciences, Nanjing University, Nanjing 210023, China
| | - Zhangcai Qin
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China; School of Atmospheric Sciences, Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-sen University, Zhuhai 519000, China
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Jones AR, Alleway HK, McAfee D, Reis-Santos P, Theuerkauf SJ, Jones RC. Climate-Friendly Seafood: The Potential for Emissions Reduction and Carbon Capture in Marine Aquaculture. Bioscience 2022; 72:123-143. [PMID: 35145350 PMCID: PMC8824708 DOI: 10.1093/biosci/biab126] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Aquaculture is a critical food source for the world's growing population, producing 52% of the aquatic animal products consumed. Marine aquaculture (mariculture) generates 37.5% of this production and 97% of the world's seaweed harvest. Mariculture products may offer a climate-friendly, high-protein food source, because they often have lower greenhouse gas (GHG) emission footprints than do the equivalent products farmed on land. However, sustainable intensification of low-emissions mariculture is key to maintaining a low GHG footprint as production scales up to meet future demand. We examine the major GHG sources and carbon sinks associated with fed finfish, macroalgae and bivalve mariculture, and the factors influencing variability across sectors. We highlight knowledge gaps and provide recommendations for GHG emissions reductions and carbon storage, including accounting for interactions between mariculture operations and surrounding marine ecosystems. By linking the provision of maricultured products to GHG abatement opportunities, we can advance climate-friendly practices that generate sustainable environmental, social, and economic outcomes.
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Affiliation(s)
- Alice R Jones
- University of Adelaide, Adelaide, South Australia, Australia
| | - Heidi K Alleway
- Nature Conservancy's Aquaculture Program, Arlington, Virginia, United States
| | - Dominic McAfee
- University of Adelaide, Adelaide, South Australia, Australia
| | | | - Seth J Theuerkauf
- NOAA National Marine Fisheries Office of Aquaculture, Silver Spring, Maryland, United States
| | - Robert C Jones
- Nature Conservancy's Aquaculture Program, Arlington, Virginia, United States
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Cai M, Yin X, Tang X, Zhang C, Zheng Q, Li M. Metatranscriptomics reveals different features of methanogenic archaea among global vegetated coastal ecosystems. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 802:149848. [PMID: 34464803 DOI: 10.1016/j.scitotenv.2021.149848] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 08/17/2021] [Accepted: 08/19/2021] [Indexed: 06/13/2023]
Abstract
Vegetated coastal ecosystems (VCEs; i.e., mangroves, saltmarshes, and seagrasses) represent important sources of natural methane emission. Despite recent advances in the understanding of novel taxa and pathways associated with methanogenesis in these ecosystems, the key methanogenic players and the contribution of different substrates to methane formation remain elusive. Here, we systematically investigate the community and activity of methanogens using publicly available metatranscriptomes at a global scale together with our in-house metatranscriptomic dataset. Taxonomic profiling reveals that 13 groups of methanogenic archaea were transcribed in the investigated VCEs, and they were predominated by Methanosarcinales. Among these VCEs, methanogens exhibited all the three known methanogenic pathways in some mangrove sediments, where methylotrophic methanogens Methanosarcinales/Methanomassiliicoccales grew on diverse methyl compounds and coexisted with hydrogenotrophic (mainly Methanomicrobiales) and acetoclastic (mainly Methanothrix) methanogens. Contrastingly, the predominant methanogenic pathway in saltmarshes and seagrasses was constrained to methylotrophic methanogenesis. These findings reveal different archaeal methanogens in VCEs and suggest the potentially distinct methanogenesis contributions in these VCEs to the global warming.
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Affiliation(s)
- Mingwei Cai
- Institute of Chemical Biology, Shenzhen Bay Laboratory, Shenzhen, China; Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, China.
| | - Xiuran Yin
- Microbial Ecophysiology Group, Faculty of Biology/Chemistry, University of Bremen, Bremen, Germany; MARUM, Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
| | - Xiaoyu Tang
- Institute of Chemical Biology, Shenzhen Bay Laboratory, Shenzhen, China; School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing, China
| | - Cuijing Zhang
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, China
| | - Qingfei Zheng
- Institute of Chemical Biology, Shenzhen Bay Laboratory, Shenzhen, China; School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, China.
| | - Meng Li
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, China.
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Duarte de Paula Costa M, Lovelock CE, Waltham NJ, Moritsch MM, Butler D, Power T, Thomas E, Macreadie PI. Modelling blue carbon farming opportunities at different spatial scales. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 301:113813. [PMID: 34607133 DOI: 10.1016/j.jenvman.2021.113813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 09/03/2021] [Accepted: 09/21/2021] [Indexed: 06/13/2023]
Abstract
There is a growing interest in including blue carbon ecosystems (i.e., mangroves, tidal marshes and seagrasses) in climate mitigation programs in national and sub-national policies, with restoration and conservation of these ecosystems identified as potential activities to increase carbon accumulation through time. However, there is still a gap on the spatial scales needed to produce carbon offsets comparable with terrestrial or agricultural ecosystems. Here, we used the Coastal Blue Carbon InVEST 3.7.0 model to estimate future net carbon sequestration in blue carbon ecosystems along Australia's Great Barrier Reef (hereafter GBR) catchments, considering different management scenarios (i.e., reintroduction of tidal exchange through the removal of barriers, sea level rise, restoring low lying land) at three different spatial scales: whole GBR coastline, regional (14,000-16,300 ha), and local (335-370 ha) scales. The focus of the restoration (i.e., tidal marshes and/or mangroves) was dependent on data availability for each scenario. Furthermore, we also estimated the monetary value of carbon sequestration under each management scenario and spatial scale assessed in the study. We found that large scale restoration of tidal marshes could potentially sequester an additional ∼800,000 tonnes of CO2e by 2045 (potentially generating AU$12 million based on the average Australia carbon price), with greater opportunities when sea level rise is accounted for in the modelling. Also, we found that regional and local projects would generate up to 23 tonnes CO2e ha-1 by the end of the crediting period. Our results can guide future decisions in the blue carbon market and financing schemes, however, the return on investment is dependent on the carbon price and funding scheme available for project implementation.
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Affiliation(s)
- Micheli Duarte de Paula Costa
- Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Burwood Campus, Burwood, VIC, 3125, Australia.
| | - Catherine E Lovelock
- School of Biological Sciences, The University of Queensland, St. Lucia, QLD, 4072, Australia
| | - Nathan J Waltham
- Centre for Tropical Water and Aquatic Ecosystem Research, College of Science and Engineering, James Cook University, Cairns, QLD, 4870, Australia
| | - Monica M Moritsch
- University of California Santa Cruz, Department of Ecology and Evolutionary Biology, Santa Cruz, CA, 95060, USA; School of Life and Environmental Sciences, Deakin University, Warrnambool Campus, Warrnambool, VIC, 3280, Australia
| | - Don Butler
- Department of Environment and Science, Brisbane, QLD, 4000, Australia
| | - Trent Power
- Catchment Solutions, Mackay, QLD, 4750, Australia
| | - Evan Thomas
- Department of Environment and Science, Brisbane, QLD, 4000, Australia
| | - Peter I Macreadie
- Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Burwood Campus, Burwood, VIC, 3125, Australia
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38
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Mai Z, Ye M, Wang Y, Foong SY, Wang L, Sun F, Cheng H. Characteristics of Microbial Community and Function With the Succession of Mangroves. Front Microbiol 2021; 12:764974. [PMID: 34950118 PMCID: PMC8689078 DOI: 10.3389/fmicb.2021.764974] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 11/05/2021] [Indexed: 12/02/2022] Open
Abstract
In this study, 16S high-throughput and metagenomic sequencing analyses were employed to explore the changes in microbial community and function with the succession of mangroves (Sonneratia alba, Rhizophora apiculata, and Bruguiera parviflora) along the Merbok river estuary in Malaysia. The sediments of the three mangroves harbored their own unique dominant microbial taxa, whereas R. apiculata exhibited the highest microbial diversity. In general, Gammaproteobacteria, Actinobacteria, Alphaproteobacteria, Deltaproteobacteria, and Anaerolineae were the dominant microbial classes, but their abundances varied significantly among the three mangroves. Principal coordinates and redundancy analyses revealed that the specificity of the microbial community was highly correlated with mangrove populations and environmental factors. The results further showed that R. apiculata exhibited the highest carbon-related metabolism, coinciding with the highest organic carbon and microbial diversity. In addition, specific microbial taxa, such as Desulfobacterales and Rhizobiales, contributed the highest functional activities related to carbon metabolism, prokaryote carbon fixation, and methane metabolism. The present results provide a comprehensive understanding of the adaptations and functions of microbes in relation to environmental transition and mangrove succession in intertidal regions. High microbial diversity and carbon metabolism in R. apiculata might in turn facilitate and maintain the formation of climax mangroves in the middle region of the Merbok river estuary.
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Affiliation(s)
- Zhimao Mai
- State Key Laboratory of Tropical Oceanography, Key Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
| | - Mai Ye
- State Key Laboratory of Tropical Oceanography, Key Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Guangdong Provincial Academy of Environmental Science, Guangzhou, China
| | - Youshao Wang
- State Key Laboratory of Tropical Oceanography, Key Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
| | - Swee Yeok Foong
- School of Biological Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | - Lin Wang
- State Key Laboratory of Tropical Oceanography, Key Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
| | - Fulin Sun
- State Key Laboratory of Tropical Oceanography, Key Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China.,Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, China
| | - Hao Cheng
- State Key Laboratory of Tropical Oceanography, Key Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
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39
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Gao CH, Zhang S, Ding QS, Wei MY, Li H, Li J, Wen C, Gao GF, Liu Y, Zhou JJ, Zhang JY, You YP, Zheng HL. Source or sink? A study on the methane flux from mangroves stems in Zhangjiang estuary, southeast coast of China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 788:147782. [PMID: 34134386 DOI: 10.1016/j.scitotenv.2021.147782] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 05/11/2021] [Accepted: 05/11/2021] [Indexed: 06/12/2023]
Abstract
Mangrove ecosystems are an important component of "blue carbon". However, it is not clear whether the stems play roles in the CH4 budget of mangrove ecosystems. This study investigated the CH4 emission from mangrove stems and its potential driving factors. We set up six sample plots in the Zhangjiang Estuary National Mangrove Nature Reserve, where Kandelia obovata, Avicennia marina and Aegiceras corniculata are the main mangrove tree species. Soil properties such as total carbon content, redox potential and salinity were determined in each plot. The dynamic chamber method was used to measure mangrove stems and soil CH4 fluxes. Combined field survey results with Principal Component Analysis (PCA) of soil properties, we divided the six plots into two sites (S1 and S2) to perform statistical analyses of stem CH4 fluxes. Then the CH4 fluxes from mangrove tree stems and soil were further scaled up to the ecosystem level through the mapping model. Under different backgrounds of soil properties, salinity and microbial biomass carbon were the main factors modified soil CH4 fluxes in the two sites, and further affected the stem CH4 fluxes of mangroves. The soil of both sites are sources of CH4, and the soil CH4 emission of S2 was about twice higher than that of S1. Results of upscaling model showed that mangrove stems in S1 were CH4 sinks with -105.65 g d-1. But stems in S2 were CH4 sources around 1448.24 g d-1. Taken together, our results suggested that CH4 emission from mangrove soils closely depends on soils properties. And mangrove stems were found to act as both CH4 sources and CH4 sinks depend on soil CH4 production. Therefore, when calculating the CH4 budget of the mangrove ecosystem, the contribution of mangrove plant stems cannot be ignored.
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Affiliation(s)
- Chang-Hao Gao
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, PR China
| | - Shan Zhang
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, PR China
| | - Qian-Su Ding
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, PR China
| | - Ming-Yue Wei
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, PR China
| | - Huan Li
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, PR China
| | - Jing Li
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, PR China
| | - Chen Wen
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, PR China
| | - Gui-Feng Gao
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, PR China; Chinese Academy of Sciences, Institute of Soil Science, State Key Laboratory of Soil & Sustainable Agriculture, 71 East Beijing Rd, Nanjing, Jiangsu 210008, PR China
| | - Yu Liu
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, PR China
| | - Jia-Jie Zhou
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, PR China
| | - Jing-Ya Zhang
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, PR China
| | - Yan-Ping You
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, PR China
| | - Hai-Lei Zheng
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, PR China.
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40
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Trevathan-Tackett SM, Kepfer-Rojas S, Engelen AH, York PH, Ola A, Li J, Kelleway JJ, Jinks KI, Jackson EL, Adame MF, Pendall E, Lovelock CE, Connolly RM, Watson A, Visby I, Trethowan A, Taylor B, Roberts TNB, Petch J, Farrington L, Djukic I, Macreadie PI. Ecosystem type drives tea litter decomposition and associated prokaryotic microbiome communities in freshwater and coastal wetlands at a continental scale. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 782:146819. [PMID: 33838377 DOI: 10.1016/j.scitotenv.2021.146819] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 03/22/2021] [Accepted: 03/25/2021] [Indexed: 06/12/2023]
Abstract
Wetland ecosystems are critical to the regulation of the global carbon cycle, and there is a high demand for data to improve carbon sequestration and emission models and predictions. Decomposition of plant litter is an important component of ecosystem carbon cycling, yet a lack of knowledge on decay rates in wetlands is an impediment to predicting carbon preservation. Here, we aim to fill this knowledge gap by quantifying the decomposition of standardised green and rooibos tea litter over one year within freshwater and coastal wetland soils across four climates in Australia. We also captured changes in the prokaryotic members of the tea-associated microbiome during this process. Ecosystem type drove differences in tea decay rates and prokaryotic microbiome community composition. Decomposition rates were up to 2-fold higher in mangrove and seagrass soils compared to freshwater wetlands and tidal marshes, in part due to greater leaching-related mass loss. For tidal marshes and freshwater wetlands, the warmer climates had 7-16% less mass remaining compared to temperate climates after a year of decomposition. The prokaryotic microbiome community composition was significantly different between substrate types and sampling times within and across ecosystem types. Microbial indicator analyses suggested putative metabolic pathways common across ecosystems were used to breakdown the tea litter, including increased presence of putative methylotrophs and sulphur oxidisers linked to the introduction of oxygen by root in-growth over the incubation period. Structural equation modelling analyses further highlighted the importance of incubation time on tea decomposition and prokaryotic microbiome community succession, particularly for rooibos tea that experienced a greater proportion of mass loss between three and twelve months compared to green tea. These results provide insights into ecosystem-level attributes that affect both the abiotic and biotic controls of belowground wetland carbon turnover at a continental scale, while also highlighting new decay dynamics for tea litter decomposing under longer incubations.
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Affiliation(s)
- Stacey M Trevathan-Tackett
- Deakin University, Centre for Integrative Ecology, School of Life and Environmental Sciences, 221 Burwood Hwy, Burwood, VIC 3125, Australia.
| | - Sebastian Kepfer-Rojas
- Department of Geosciences and Natural Resource Management, University of Copenhagen, Rolighedsvej 23, 1958 Frederiksberg, Denmark
| | - Aschwin H Engelen
- Centre for Marine Sciences (CCMAR), University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
| | - Paul H York
- James Cook University, Centre for Tropical Water and Aquatic Ecosystem Research (TropWATER), Cairns, Queensland 4870, Australia
| | - Anne Ola
- The University of Queensland, School of Biological Sciences, St. Lucia, Queensland 4072, Australia
| | - Jinquan Li
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2751, Australia; National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Jeffrey J Kelleway
- School of Earth, Atmospheric and Life Sciences, GeoQuEST Research Centre, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Kristin I Jinks
- Coastal and Marine Research Centre, Australian Rivers Institute, School of Environment and Science, Griffith University, Gold Coast, Queensland 4222, Australia
| | - Emma L Jackson
- Coastal Marine Ecosystems Research Centre, CQUniversity, Gladstone, QLD 4680, Australia
| | | | - Elise Pendall
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2751, Australia
| | - Catherine E Lovelock
- The University of Queensland, School of Biological Sciences, St. Lucia, Queensland 4072, Australia
| | - Rod M Connolly
- Coastal and Marine Research Centre, Australian Rivers Institute, School of Environment and Science, Griffith University, Gold Coast, Queensland 4222, Australia
| | - Anne Watson
- School of Natural Sciences, University of Tasmania, Sandy Bay, TAS 7005, Australia
| | - Inger Visby
- Derwent Estuary Program, 24 Davey St Hobart, TAS 7001, Australia
| | - Allison Trethowan
- RiverConnect - Greater Shepparton City Council, Shepparton, VIC 3630, Australia
| | - Ben Taylor
- Nature Glenelg Trust, PO Box 2177, Mt Gambier, SA 5290, Australia
| | | | - Jane Petch
- Melbourne Water, South East Regional Office, Worsley Road, Bangholme, VIC 3175, Australia
| | | | - Ika Djukic
- Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf, Switzerland
| | - Peter I Macreadie
- Deakin University, Centre for Integrative Ecology, School of Life and Environmental Sciences, 221 Burwood Hwy, Burwood, VIC 3125, Australia
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41
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Zhao X, Rivera-Monroy VH, Farfán LM, Briceño H, Castañeda-Moya E, Travieso R, Gaiser EE. Tropical cyclones cumulatively control regional carbon fluxes in Everglades mangrove wetlands (Florida, USA). Sci Rep 2021; 11:13927. [PMID: 34230502 PMCID: PMC8260777 DOI: 10.1038/s41598-021-92899-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 06/09/2021] [Indexed: 11/11/2022] Open
Abstract
Mangroves are the most blue-carbon rich coastal wetlands contributing to the reduction of atmospheric CO2 through photosynthesis (sequestration) and high soil organic carbon (C) storage. Globally, mangroves are increasingly impacted by human and natural disturbances under climate warming, including pervasive pulsing tropical cyclones. However, there is limited information assessing cyclone's functional role in regulating wetlands carbon cycling from annual to decadal scales. Here we show how cyclones with a wide range of integrated kinetic energy (IKE) impact C fluxes in the Everglades, a neotropical region with high cyclone landing frequency. Using long-term mangrove Net Primary Productivity (Litterfall, NPPL) data (2001-2018), we estimated cyclone-induced litterfall particulate organic C (litter-POC) export from mangroves to estuarine waters. Our analysis revealed that this lateral litter-POC flux (71-205 g C m-2 year-1)-currently unaccounted in global C budgets-is similar to C burial rates (69-157 g C m-2 year-1) and dissolved inorganic carbon (DIC, 61-229 g C m-2 year-1) export. We proposed a statistical model (PULITER) between IKE-based pulse index and NPPL to determine cyclone's impact on mangrove role as C sink or source. Including the cyclone's functional role in regulating mangrove C fluxes is critical to developing local and regional climate change mitigation plans.
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Affiliation(s)
- Xiaochen Zhao
- Department of Oceanography and Coastal Sciences, College of the Coast and Environment, Louisiana State University, Baton Rouge, LA, 70803, USA.
| | - Victor H Rivera-Monroy
- Department of Oceanography and Coastal Sciences, College of the Coast and Environment, Louisiana State University, Baton Rouge, LA, 70803, USA.
| | - Luis M Farfán
- Unidad La Paz, Centro de Investigación Científica y de Educación Superior de Ensenada, Baja California Sur, Mexico
| | - Henry Briceño
- Institute of Environment, Florida International University, Miami, FL, 33199, USA
| | | | - Rafael Travieso
- Institute of Environment, Florida International University, Miami, FL, 33199, USA
| | - Evelyn E Gaiser
- Institute of Environment, Florida International University, Miami, FL, 33199, USA
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Wigand C, Eagle M, Branoff BL, Balogh S, Miller KM, Martin RM, Hanson A, Oczkowski AJ, Huertas E, Loffredo J, Watson EB. Recent Carbon Storage and Burial Exceed Historic Rates in the San Juan Bay Estuary Peri-Urban Mangrove Forests (Puerto Rico, United States). FRONTIERS IN FORESTS AND GLOBAL CHANGE 2021; 4:1-14. [PMID: 35118374 PMCID: PMC8809366 DOI: 10.3389/ffgc.2021.676691] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Mangroves sequester significant quantities of organic carbon (C) because of high rates of burial in the soil and storage in biomass. We estimated mangrove forest C storage and accumulation rates in aboveground and belowground components among five sites along an urbanization gradient in the San Juan Bay Estuary, Puerto Rico. Sites included the highly urbanized and clogged Caño Martin Peña in the western half of the estuary, a series of lagoons in the center of the estuary, and a tropical forest reserve (Piñones) in the easternmost part. Radiometrically dated cores were used to determine sediment accretion and soil C storage and burial rates. Measurements of tree dendrometers coupled with allometric equations were used to estimate aboveground biomass. Estuary-wide mangrove forest C storage and accumulation rates were estimated using interpolation methods and coastal vegetation cover data. In recent decades (1970-2016), the highly urbanized Martin Peña East (MPE) site with low flushing had the highest C storage and burial rates among sites. The MPE soil carbon burial rate was over twice as great as global estimates. Mangrove forest C burial rates in recent decades were significantly greater than historic decades (1930-1970) at Cañno Martin Peña and Piñones. Although MPE and Piñones had similarly low flushing, the landscape settings (clogged canal vs forest reserve) and urbanization (high vs low) were different. Apparently, not only urbanization, but site-specific flushing patterns, landscape setting, and soil fertility affected soil C storage and burial rates. There was no difference in C burial rates between historic and recent decades at the San José and La Torrecilla lagoons. Mangrove forests had soil C burial rates ranging from 88 g m-2 y-1 at the San José lagoon to 469 g m-2 y-1 at the MPE in recent decades. Watershed anthropogenic CO2 emissions (1.56 million Mg C y-1) far exceeded the annual mangrove forest C storage rates (aboveground biomass plus soils: 17,713 Mg C y-1). A combination of maintaining healthy mangrove forests and reducing anthropogenic emissions might be necessary to mitigate greenhouse gas emissions in urban, tropical areas.
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Affiliation(s)
- Cathleen Wigand
- U.S. EPA, Atlantic Coastal Environmental Sciences Division, Narragansett, RI, United States
| | - Meagan Eagle
- U.S. Geological Survey, Woods Hole Coastal and Marine Science Center, Woods Hole, MA, United States
| | - Benjamin L. Branoff
- U.S. EPA, Gulf Ecosystem Measurement and Modeling Division, Gulf Breeze, FL, United States
| | - Stephen Balogh
- U.S. EPA, Atlantic Coastal Environmental Sciences Division, Narragansett, RI, United States
| | - Kenneth M. Miller
- General Dynamics Information Technology, Alexandria, VA, United States
| | - Rose M. Martin
- U.S. EPA, Atlantic Coastal Environmental Sciences Division, Narragansett, RI, United States
- Oak Ridge Institute for Science and Education Participant, Oak Ridge, TN, United States
| | - Alana Hanson
- U.S. EPA, Atlantic Coastal Environmental Sciences Division, Narragansett, RI, United States
| | - Autumn J. Oczkowski
- U.S. EPA, Atlantic Coastal Environmental Sciences Division, Narragansett, RI, United States
| | - Evelyn Huertas
- U.S. EPA, Caribbean Environmental Protection Division, Guaynabo, PR, United States
| | - Joseph Loffredo
- U.S. EPA, Atlantic Coastal Environmental Sciences Division, Narragansett, RI, United States
- Oak Ridge Institute for Science and Education Participant, Oak Ridge, TN, United States
| | - Elizabeth B. Watson
- Department of Biodiversity, Earth and Environmental Sciences and The Academy of Natural Sciences, Drexel University, Philadelphia, PA, United States
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Nie S, Zhang Z, Mo S, Li J, He S, Kashif M, Liang Z, Shen P, Yan B, Jiang C. Desulfobacterales stimulates nitrate reduction in the mangrove ecosystem of a subtropical gulf. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 769:144562. [PMID: 33460836 DOI: 10.1016/j.scitotenv.2020.144562] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 12/10/2020] [Accepted: 12/13/2020] [Indexed: 06/12/2023]
Abstract
The amount of nitrogen compounds discharged into the natural environment has increased drastically due to frequent human activities and led to worsening pollution. The mangrove ecosystem can remove nitrogen pollution, in this regard, few studies had focused on the relationship among nitrogen cycling genes, environmental factors, and taxonomic composition. In this study, shotgun metagenomic sequencing and quantitative polymerase chain reaction were used to understand the nitrogen cycle in the subtropical mangrove ecosystem in the Beibu Gulf of China. Eight nitrogen cycling pathways were annotated. Nitrogen metabolism activities were significantly higher in the wet season than those in the dry season. The most abundant genes were those related to the synthesis and degradation of organic nitrogen, followed by the genes involved in nitrate reduction (denitrification, dissimilation/assimilation nitrate reduction). Furthermore, dissimilation nitrate reduction was the main nitrate reduction pathway. Desulfobacterales plays an important role in nitrogen cycling and contributes 12% of the genes of nitrogen pathways on average; as such, a strong coupling relationship exists among nitrogen cycling, sulfur cycling, and carbon cycling in the mangrove ecosystem. Nitrogen pollution in the mangrove wetland can be efficiently alleviated by nitrate reduction of Desulfobacterales. Nevertheless, only 50% of genes can be matched among the known species, suggesting that many unknown microorganisms in the mangrove ecosystem can perform nitrogen cycling. Total phosphorus, available iron, and total organic carbon are the key environmental factors that influence the distribution of nitrogen cycling genes, related pathways, and the taxonomic composition. Our study clearly illustrates how the mangrove ecosystem mitigates nitrogen pollution through Desulfobacterales. This finding could provide a research reference for the whole nitrogen cycling in the mangrove ecosystem.
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Affiliation(s)
- Shiqing Nie
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning 530004, China
| | - Zufan Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning 530004, China
| | - Shuming Mo
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning 530004, China
| | - Jinhui Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning 530004, China
| | - Sheng He
- Guangxi Birth Defects Prevention and Control Institute, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning 530033, China
| | - Muhammad Kashif
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning 530004, China
| | - Zhengwu Liang
- Guangxi Liyuanbao Science and Technology Co., Ltd, Nanning 530033, China
| | - Peihong Shen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning 530004, China
| | - Bing Yan
- Guangxi Key Lab of Mangrove Conservation and Utilization, Guangxi Mangrove Research Center, Guangxi Academy of Sciences, Beihai 536000, China.
| | - Chengjian Jiang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning 530004, China.
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Ouyang X, Guo F, Lee SY. The impact of super-typhoon Mangkhut on sediment nutrient density and fluxes in a mangrove forest in Hong Kong. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 766:142637. [PMID: 33071132 DOI: 10.1016/j.scitotenv.2020.142637] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 09/25/2020] [Accepted: 09/25/2020] [Indexed: 06/11/2023]
Abstract
Cyclone disturbance results in mangrove foliage loss, tree mortality and other changes in ecosystem processes. However, the impact of cyclones on mangrove sediment nutrient density, sediment-air CO2 and CH4 fluxes and their isotopes remains largely unknown. Super-typhoon Mangkhut (maximum gust 256 km h-1) hit Hong Kong in September 2018. We investigated the influence of the cyclone by comparing pre- and post-cyclone sediment carbon cycling processes as well as nitrogen density during an 8-month period in a mangrove forest at Ting Kok, Hong Kong. Time and/or nitrogen density are the dominant drivers of the variation of dark sediment-air CO2 fluxes (Rd) and sediment nutrient density. Significant changes in Rd and their δ13CO2 values, sediment organic carbon density (SOC) and nitrogen density (SON) occurred after the cyclone. Rd were highest one month after the cyclone (0.05 ± 0.01 mmol m-2 min-1) and lowest before the cyclone (8.32 ± 2.84 μmol m-2 min-1). δ13CO2 of pre-cyclone Rd (-18.2 ± 1.7‰) was significantly higher than that of all post-cyclone fluxes (-22.9 ± 1.5‰ to -23.6 ± 1.8‰). Both SOC and SON were highest one month after the cyclone (23.05 ± 1.92 kg C m-3, 2.42 ± 0.11 kg N m-3, 20-40 cm). A significant positive relationship exists between Rd and SON. Sediment-air CH4 fluxes did not show significant changes over time but along the sea-land gradient (0.28 ± 0.21 to 0.61 ± 0.22 μmol m-2 min-1). Cyclone disturbance results in the pulse input of litter, which may explain the significant increase in post-cyclone Rd and lower δ13CO2 of Rd. With anticipated climate change-driven effects on cyclone occurrence and intensity, our data underscores the significance of incorporating the influence of cyclone disturbance in constraining the global nutrient budgets in mangroves.
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Affiliation(s)
- Xiaoguang Ouyang
- Simon F.S. Li Marine Science Laboratory, School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong Special Administrative Region, China.
| | - Fen Guo
- Simon F.S. Li Marine Science Laboratory, School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong Special Administrative Region, China
| | - Shing Yip Lee
- Simon F.S. Li Marine Science Laboratory, School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong Special Administrative Region, China
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45
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Trégarot E, Caillaud A, Cornet CC, Taureau F, Catry T, Cragg SM, Failler P. Mangrove ecological services at the forefront of coastal change in the French overseas territories. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 763:143004. [PMID: 33158516 DOI: 10.1016/j.scitotenv.2020.143004] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 09/18/2020] [Accepted: 10/07/2020] [Indexed: 06/11/2023]
Abstract
Mangroves are located at the land-sea interface and are therefore confronted with human settlement in the coastal areas and associated pressures and uses. This unique habitat provides important ecosystem services to coastal communities worldwide, but the global decline of their surface area and their degradation over the past decades has put coastal communities even more at risk from the effects of climate change. This paper aims to present the first ecosystem services valuation of the mangroves of the French overseas Territories. We provide the economic value of mangroves for coastal protection, carbon sequestration, water purification and fish biomass production. We coupled a geospatial analysis of mangrove's distribution with the characterisation of land artificialisation behind mangroves. Then we developed a vulnerability index based on multiple indicators of exposure to environmental and anthropogenic stressors, mangroves' sensitivity to pressures, and mangroves' adaptive capacity to adjust their production functions accordingly. We estimated the monetary value of regulation and support services provided by mangroves in French overseas territories to be on average EUR 1.6 billion annually, 60% of which is carbon sequestration, 28% coastal protection, 7% water purification and 6% fish biomass production. When considering mangroves services without the vulnerability adjustment, the total value for those services would reach EUR 2 billion per year. Although much of the spatio-temporal variability in mangrove functioning could not be considered given the spatial scale of our study, these results demonstrate the value and socio-economic importance of mangroves to face and adapt from the effects of coastal change, at local and national scales, but also highlight the loss of services due to their vulnerability. This paper emphasises on the value of ecosystem services provided by mangroves to face coastal change so that a service-based approach to conservation would plead for increased national investment into their protection.
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Affiliation(s)
- Ewan Trégarot
- Centre for Blue Governance, Department of Economics and Finance, Portsmouth Business School, University of Portsmouth, Richmond Building, Portland Street, Portsmouth PO1 3DE, United Kingdom.
| | | | - Cindy C Cornet
- Centre for Blue Governance, Department of Economics and Finance, Portsmouth Business School, University of Portsmouth, Richmond Building, Portland Street, Portsmouth PO1 3DE, United Kingdom
| | - Florent Taureau
- Private Consultant in Coastal Environment, 35600 Sainte-Marie, France
| | - Thibault Catry
- ESPACE-DEV, UMR 228 IRD/UM/UR/UG/UA, Institut de Recherche pour le Développement (IRD), Montpellier, France
| | - Simon M Cragg
- Centre for Blue Governance, Institute of Marine Sciences, University of Portsmouth, Ferry Road, Portsmouth PO4 9LY, United Kingdom
| | - Pierre Failler
- Centre for Blue Governance, Department of Economics and Finance, Portsmouth Business School, University of Portsmouth, Richmond Building, Portland Street, Portsmouth PO1 3DE, United Kingdom
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46
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Erazo NG, Bowman JS. Sensitivity of the mangrove-estuarine microbial community to aquaculture effluent. iScience 2021; 24:102204. [PMID: 33786421 PMCID: PMC7994199 DOI: 10.1016/j.isci.2021.102204] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/25/2020] [Accepted: 02/15/2021] [Indexed: 02/05/2023] Open
Abstract
Mangrove-dominated estuaries host a diverse microbial assemblage that facilitates nutrient and carbon conversions and could play a vital role in maintaining ecosystem health. In this study, we used 16S rRNA gene analysis, metabolic inference, nutrient concentrations, and δ13C and δ15N isotopes to evaluate the impact of land use change on near-shore biogeochemical cycles and microbial community structures within mangrove-dominated estuaries. Samples in close proximity to active shrimp aquaculture were high in NH4+, NO3− NO2−, and PO43−; lower in microbial community and metabolic diversity; and dominated by putative nitrifiers, denitrifies, and sulfur-oxidizing bacteria. Near intact mangrove forests we observed the presence of potential nitrogen fixers of the genus Calothrix and order Rhizobiales. We identified possible indicators of aquaculture effluents such as Pseudomonas balearica, Ponitmonas salivibrio, family Chromatiaceae, and genus Arcobacter. These results highlight the sensitivity of the estuarine-mangrove microbial community, and their ecosystem functions, to land use changes. In near-intact mangrove forests, we observed the presence of nitrogen fixers Calothrix could play a role in increasing nitrogen inventories via nitrogen fixation Disturbed sites were correlated with increased nitrogen and reduction in diversity Disturbed sites were dominated by nitrifiers, denitrifies, and sulfur-oxidizing bacteria
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Affiliation(s)
- Natalia G Erazo
- Scripps Institution of Oceanography, UC San Diego, 8622 Kennel Way, La Jolla, CA 92037, USA.,Center for Marine Biodiversity and Conservation, UC San Diego, La Jolla, CA, USA
| | - Jeff S Bowman
- Scripps Institution of Oceanography, UC San Diego, 8622 Kennel Way, La Jolla, CA 92037, USA.,Center for Microbiome Innovation, UC San Diego, La Jolla, CA, USA.,Center for Marine Biodiversity and Conservation, UC San Diego, La Jolla, CA, USA
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47
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Introducing the Mangrove Microbiome Initiative: Identifying Microbial Research Priorities and Approaches To Better Understand, Protect, and Rehabilitate Mangrove Ecosystems. mSystems 2020; 5:5/5/e00658-20. [PMID: 33082281 PMCID: PMC7577295 DOI: 10.1128/msystems.00658-20] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Mangrove ecosystems provide important ecological benefits and ecosystem services, including carbon storage and coastline stabilization, but they also suffer great anthropogenic pressures. Microorganisms associated with mangrove sediments and the rhizosphere play key roles in this ecosystem and make essential contributions to its productivity and carbon budget. Understanding this nexus and moving from descriptive studies of microbial taxonomy to hypothesis-driven field and lab studies will facilitate a mechanistic understanding of mangrove ecosystem interaction webs and open opportunities for microorganism-mediated approaches to mangrove protection and rehabilitation. Mangrove ecosystems provide important ecological benefits and ecosystem services, including carbon storage and coastline stabilization, but they also suffer great anthropogenic pressures. Microorganisms associated with mangrove sediments and the rhizosphere play key roles in this ecosystem and make essential contributions to its productivity and carbon budget. Understanding this nexus and moving from descriptive studies of microbial taxonomy to hypothesis-driven field and lab studies will facilitate a mechanistic understanding of mangrove ecosystem interaction webs and open opportunities for microorganism-mediated approaches to mangrove protection and rehabilitation. Such an effort calls for a multidisciplinary and collaborative approach, involving chemists, ecologists, evolutionary biologists, microbiologists, oceanographers, plant scientists, conservation biologists, and stakeholders, and it requires standardized methods to support reproducible experiments. Here, we outline the Mangrove Microbiome Initiative, which is focused around three urgent priorities and three approaches for advancing mangrove microbiome research.
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48
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Mueller P, Mozdzer TJ, Langley JA, Aoki LR, Noyce GL, Megonigal JP. Plant species determine tidal wetland methane response to sea level rise. Nat Commun 2020; 11:5154. [PMID: 33056993 PMCID: PMC7560622 DOI: 10.1038/s41467-020-18763-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 09/01/2020] [Indexed: 11/23/2022] Open
Abstract
Blue carbon (C) ecosystems are among the most effective C sinks of the biosphere, but methane (CH4) emissions can offset their climate cooling effect. Drivers of CH4 emissions from blue C ecosystems and effects of global change are poorly understood. Here we test for the effects of sea level rise (SLR) and its interactions with elevated atmospheric CO2, eutrophication, and plant community composition on CH4 emissions from an estuarine tidal wetland. Changes in CH4 emissions with SLR are primarily mediated by shifts in plant community composition and associated plant traits that determine both the direction and magnitude of SLR effects on CH4 emissions. We furthermore show strong stimulation of CH4 emissions by elevated atmospheric CO2, whereas effects of eutrophication are not significant. Overall, our findings demonstrate a high sensitivity of CH4 emissions to global change with important implications for modeling greenhouse-gas dynamics of blue C ecosystems.
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Affiliation(s)
- Peter Mueller
- Smithsonian Environmental Research Center, Edgewater, MD, 21037, USA.
- Institute of Soil Science, Center for Earth System Research and Sustainability (CEN), Universität Hamburg, 20146, Hamburg, Germany.
| | - Thomas J Mozdzer
- Department of Biology, Bryn Mawr College, Bryn Mawr, PA, 19010, USA
| | - J Adam Langley
- Department of Biology, Center for Biodiversity and Ecosystem Stewardship, Villanova University, Villanova, PA, 19003, USA
| | - Lillian R Aoki
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, 14853, USA
| | - Genevieve L Noyce
- Smithsonian Environmental Research Center, Edgewater, MD, 21037, USA
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49
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Al-Haj AN, Fulweiler RW. Response to concerns and uncertainties relating to methane emissions synthesis for vegetated coastal ecosystems. GLOBAL CHANGE BIOLOGY 2020; 26:e10-e11. [PMID: 32573879 DOI: 10.1111/gcb.15245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 06/15/2020] [Indexed: 06/11/2023]
Affiliation(s)
- Alia N Al-Haj
- Department of Earth & Environment, Boston University, Boston, MA, USA
| | - Robinson W Fulweiler
- Department of Earth & Environment, Boston University, Boston, MA, USA
- Department of Biology, Boston University, Boston, MA, USA
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50
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Rosentreter JA, Williamson P. Concerns and uncertainties relating to methane emissions synthesis for vegetated coastal ecosystems. GLOBAL CHANGE BIOLOGY 2020; 26:5351-5352. [PMID: 32495976 DOI: 10.1111/gcb.15201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 05/25/2020] [Indexed: 06/11/2023]
Affiliation(s)
- Judith A Rosentreter
- Centre for Coastal Biogeochemistry, School of Environment, Science and Engineering, Southern Cross University, Lismore, NSW, Australia
| | - Phillip Williamson
- School of Environmental Sciences, University of East Anglia, Norwich, UK
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