1
|
Huang Y, Jia Q, Wang J, Lee SC, Li X, Li X, Tang J. Winter harvesting reduces methane emissions and enhances blue carbon potential in coastal phragmites wetlands. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 938:173380. [PMID: 38797417 DOI: 10.1016/j.scitotenv.2024.173380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 05/05/2024] [Accepted: 05/18/2024] [Indexed: 05/29/2024]
Abstract
Enhancing the ability of coastal blue carbon to accumulate and store carbon and reduce net greenhouse gas emissions is an essential component of a comprehensive approach for tackling climate change. The annual winter harvesting of Phragmites is common worldwide. However, the effects of harvesting on methane (CH4) emissions and its potential as an effective blue carbon management strategy have rarely been reported. In this study, the effects of winter Phragmites harvesting on the CH4 and carbon dioxide (CO2) fluxes and the underlying mechanisms in coastal Phragmites wetlands were investigated by comparing the eddy covariance flux measurements for three coastal wetlands with different harvesting and tidal flow conditions. The results show that harvesting can greatly reduce the CH4 emissions and the radiative forcing of CH4 and CO2 fluxes in coastal Phragmites wetlands, suggesting that winter Phragmites harvesting has great potential as a nature-based strategy to mitigate global warming. The monthly mean CH4 fluxes were predominantly driven by air temperature, gross primary productivity, and latent heat fluxes, which are related to vegetation phenology. Additionally, variations in the salinity and water levels exerted strong regulation effects on CH4 emissions, highlighting the important role of proper tidal flow restoration and resalinization in enhancing blue carbon sequestration potential. Compared with the natural, tidally unrestricted wetlands, the CH4 fluxes in the impounded wetland were less strongly correlated with hydrometeorological variables, implying the increased difficulties of predicting CH4 variations in impounded ecosystem. This study facilitates the improved understanding of carbon exchange in coastal Phragmites wetlands with harvesting or impoundment, and provides new insights into effective blue carbon management strategies beyond tidal wetland restoration for mitigating the effects of climate change.
Collapse
Affiliation(s)
- Ying Huang
- State Key Laboratory of Estuarine and Coastal Research, Center for Blue Carbon Science and Technology, East China Normal University, Shanghai, China; Yangtze Delta Estuarine Wetland Ecosystem Observation and Research Station, Ministry of Education & Shanghai Science and Technology Committee, Shanghai, China.
| | - Qingyu Jia
- Institute of Atmospheric Environment, China Meteorological Administration, Shenyang, China
| | - Jiangtao Wang
- Institute of Eco-Chongming, East China Normal University, Shanghai, China
| | - Sung-Ching Lee
- Department Biogeochemical Integration, Max Planck Institute for Biogeochemistry, Jena, Germany
| | - Xianglan Li
- State Key Laboratory of Remote Sensing Science, College of Global Change and Earth System Science, Beijing Normal University, Beijing, China
| | - Xiuzhen Li
- State Key Laboratory of Estuarine and Coastal Research, Center for Blue Carbon Science and Technology, East China Normal University, Shanghai, China; Yangtze Delta Estuarine Wetland Ecosystem Observation and Research Station, Ministry of Education & Shanghai Science and Technology Committee, Shanghai, China; Institute of Eco-Chongming, East China Normal University, Shanghai, China
| | - Jianwu Tang
- State Key Laboratory of Estuarine and Coastal Research, Center for Blue Carbon Science and Technology, East China Normal University, Shanghai, China; Yangtze Delta Estuarine Wetland Ecosystem Observation and Research Station, Ministry of Education & Shanghai Science and Technology Committee, Shanghai, China; Institute of Eco-Chongming, East China Normal University, Shanghai, China
| |
Collapse
|
2
|
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.
Collapse
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.
| |
Collapse
|
3
|
Lanari M, Busk T, Holmer M, Möller-Raid T, Torn K, Schubert H, Quintana CO. From sink to source: Dynamic of greenhouse gases emissions from beach wrack accumulations in a temperate coastal bay. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 925:171783. [PMID: 38503390 DOI: 10.1016/j.scitotenv.2024.171783] [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: 11/28/2023] [Revised: 03/01/2024] [Accepted: 03/15/2024] [Indexed: 03/21/2024]
Abstract
Coastal ecosystems such as salt marshes, seagrass meadows, and kelp forests contribute to climate regulation as carbon sinks. However, coastal ecosystems may act as carbon sources as beach wrack accumulations may release greenhouse gases (GHG) during decomposition. The magnitude of GHG emissions of beach wrack accumulations under natural conditions are poorly understood, hampering accurate blue carbon accountings. In this study, we assessed the spatio-temporal variability and environmental factors driving CO2, CH4 and N2O emissions from beach wrack accumulations on a temperate sandy beach. Beach wrack accumulations, dominated by Zostera marina and opportunistic brown macroalgae, presented variable spatio-temporal dynamics. Annual beach wrack GHG emissions achieved up to 77,915 mg m-2 d-1 CO2e (CO2 equivalents) and varied largely throughout the study period due to interactive effects of temperature, wave exposure, beach wrack biomass moisture, abundance, and species composition. Our findings showed that methane emissions in new, freshly deposited, and in drifting wrack in the water reached up to 100 mg m-2 d-1, representing up to 57 % of annual CO2e emissions occurring throughout the year. Nitrous oxide emissions were highly variable and comprised a minor extent (i.e., up to 4 %) of annual CO2e emissions. Together, wrack CH4 and N2O emissions provided 13.69 g CO2 m-2 per year to the atmosphere. Our findings indicate that excessive opportunistic macroalgae biomass driven by eutrophication may explain increased CO2 and N2O emissions. We conclude that whilst beach wrack depositions are a natural and essential part of coastal ecosystems, they may provide an extra source of GHG to the atmosphere, potentially counteracting the role of vegetated coastal ecosystems as carbon sinks.
Collapse
Affiliation(s)
- Marianna Lanari
- Department of Biology, University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark.
| | - Thomas Busk
- Department of Biology, University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark
| | - Marianne Holmer
- Department of Biology, University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark
| | - Tiia Möller-Raid
- Estonian Marine Institute, University of Tartu, Mäealuse 14, 12618 Tallinn, Estonia
| | - Kaire Torn
- Estonian Marine Institute, University of Tartu, Mäealuse 14, 12618 Tallinn, Estonia
| | - Hendrik Schubert
- Institute of Biological Sciences, University of Rostock, Rostock 18059, Germany
| | - Cintia O Quintana
- Department of Biology, University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark; SDU Climate Cluster, University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark
| |
Collapse
|
4
|
Treby S, Grover SP. Carbon and nitrogen storage in Australian Sphagnum peatlands: The influence of feral horse degradation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 359:121049. [PMID: 38723499 DOI: 10.1016/j.jenvman.2024.121049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Revised: 04/21/2024] [Accepted: 04/28/2024] [Indexed: 05/22/2024]
Affiliation(s)
- Sarah Treby
- Applied Chemistry and Environmental Science, RMIT University, GPO Box 2476, Melbourne, 3001, Australia.
| | - Samantha P Grover
- Applied Chemistry and Environmental Science, RMIT University, GPO Box 2476, Melbourne, 3001, Australia
| |
Collapse
|
5
|
Schuster L, Taillardat P, Macreadie PI, Malerba ME. Freshwater wetland restoration and conservation are long-term natural climate solutions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 922:171218. [PMID: 38423329 DOI: 10.1016/j.scitotenv.2024.171218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 11/23/2023] [Accepted: 02/21/2024] [Indexed: 03/02/2024]
Abstract
Freshwater wetlands have a disproportionately large influence on the global carbon cycle, with the potential to serve as long-term carbon sinks. Many of the world's freshwater wetlands have been destroyed or degraded, thereby affecting carbon-sink capacity. Ecological restoration of degraded wetlands is thus becoming an increasingly sought-after natural climate solution. Yet the time required to revert a degraded wetland from a carbon source to sink remains largely unknown. Moreover, increased methane (CH4) and nitrous oxide (N2O) emissions might complicate the climate benefit that wetland restoration may represent. We conducted a global meta-analysis to evaluate the benefits of wetland restoration in terms of net ecosystem carbon and greenhouse gas balance. Most studies (76 %) investigated the benefits of wetland restoration in peatlands (bogs, fens, and peat swamps) in the northern hemisphere, whereas the effects of restoration in non-peat wetlands (freshwater marshes, non-peat swamps, and riparian wetlands) remain largely unexplored. Despite higher CH4 emissions, most restored (77 %) and all natural peatlands were net carbon sinks, whereas most degraded peatlands (69 %) were carbon sources. Conversely, CH4 emissions from non-peat wetlands were similar across degraded, restored, and natural non-peat wetlands. When considering the radiative forcings and atmospheric lifetimes of the different greenhouse gases, the average time for restored wetlands to have a net cooling effect on the climate after restoration is 525 years for peatlands and 141 years for non-peat wetlands. The radiative benefit of wetland restoration does, therefore, not meet the timeframe set by the Paris Agreement to limit global warming by 2100. The conservation and protection of natural freshwater wetlands should be prioritised over wetland restoration as those ecosystems already play a key role in climate change mitigation.
Collapse
Affiliation(s)
- Lukas Schuster
- School of Life and Environmental Sciences, Deakin University VIC 3125, Australia.
| | - Pierre Taillardat
- NUS Environmental Research Institute, National University of Singapore, Singapore 117411, Singapore
| | - Peter I Macreadie
- School of Life and Environmental Sciences, Deakin University VIC 3125, Australia
| | - Martino E Malerba
- School of Life and Environmental Sciences, Deakin University VIC 3125, Australia
| |
Collapse
|
6
|
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.
Collapse
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.
| |
Collapse
|
7
|
Baur PA, Henry Pinilla D, Glatzel S. Is ebullition or diffusion more important as methane emission pathway in a shallow subsaline lake? THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169112. [PMID: 38072262 DOI: 10.1016/j.scitotenv.2023.169112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 11/11/2023] [Accepted: 12/02/2023] [Indexed: 12/17/2023]
Abstract
Methane (CH4) emissions via ebullition contribute significantly to greenhouse gas emissions from freshwater bodies. According to the literature, the ebullition pathway may even be the most important pathway in some cases, particularly in shallow lakes. Ebullition rates are not often estimated because of the high uncertainty associated with episodic releases, leading to difficulties in their determination. This study provides an estimate of such emissions in a large, shallow, subsaline lake in eastern Austria, Lake Neusiedl, and compares them to the diffusion pathway. Ebullition gas sampling was conducted every 5-10 days over a period of 107 days from late March to mid-July 2021, using ebullition traps placed in three distinct locations: Reed belt, Channel and Open water/Lake. The aim was to study the temporal and spatial heterogeneity of ebullition and its contribution to total emissions. At the same time, several water quality and other environmental parameters were measured and then tested against the CH4 ebullition rates to explore them as potential drivers for this pathway. The carbon isotope fractionation factor (αC) of the measured CH4 ebullition gas, ranging from 1.03 to 1.06, indicates a dominance of the acetoclastic methanogenesis in the sediments of Lake Neusiedl, regardless of the location. The Reed belt location showed the highest mean CH4 ebullition rate (17 ± 28 mg CH4 m-2 d-1), which is >340-fold higher than the mean of the other two locations, and demonstrated also a strong temperature dependency. In all locations at Lake Neusiedl, the median CH4 fluxes via diffusion are significantly higher than via ebullition. Our analyses do not confirm the dominance of the ebullition pathway in any of the studied locations. Whereas at the Reed belt, ebullition accounts for 48 % of the CH4 emissions, in the other two locations, is responsible only for about 1 %.
Collapse
Affiliation(s)
- Pamela Alessandra Baur
- University of Vienna, Faculty of Earth Sciences, Geography and Astronomy, Department of Geography and Regional Research, Working group Geoecology, Josef-Holaubek-Platz 2, Vienna 1090, Austria; University of Vienna, Faculty of Life Sciences, Vienna Doctoral School of Ecology and Evolution (VDSEE), Djerassiplatz 1, Vienna 1030, Austria.
| | - Daniela Henry Pinilla
- University of Vienna, Faculty of Earth Sciences, Geography and Astronomy, Department of Geography and Regional Research, Working group Geoecology, Josef-Holaubek-Platz 2, Vienna 1090, Austria.
| | - Stephan Glatzel
- University of Vienna, Faculty of Earth Sciences, Geography and Astronomy, Department of Geography and Regional Research, Working group Geoecology, Josef-Holaubek-Platz 2, Vienna 1090, Austria; University of Vienna, Faculty of Life Sciences, Vienna Doctoral School of Ecology and Evolution (VDSEE), Djerassiplatz 1, Vienna 1030, Austria.
| |
Collapse
|
8
|
Chen B, Tan E, Zou W, Han LL, Tian L, Kao SJ. The external/internal sources and sinks of greenhouse gases (CO 2, CH 4, N 2O) in the Pearl River Estuary and adjacent coastal waters in summer. WATER RESEARCH 2024; 249:120913. [PMID: 38039818 DOI: 10.1016/j.watres.2023.120913] [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: 08/15/2023] [Revised: 11/09/2023] [Accepted: 11/21/2023] [Indexed: 12/03/2023]
Abstract
Estuary acts as a hotspot of greenhouse gases (GHGs, including CO2, CH4 and N2O) to the atmosphere. However, the GHGs budgets, including input/output fluxes through interfaces and biogeochemical source/sink processes in water columns, of the estuarine systems are still not well constrained due to the lacking of comprehensive observational data. Here, we presented the spatial distributions of GHGs of surface/bottom water and sediment porewater along the Pearl River Estuary (PRE) and adjacent region during summertime. The incorporation of the monitoring for the sediment-water interface (SWI) with these of the water-air interface (WAI) allows us to close the budget revealing additional information of internal consumption/production processes of the three GHGs. The oversaturated CO2 (481-7573 μatm), CH4 (289-16,990 %) and N2O (108-649 %) in surface water suggested PRE is a significant GHGs source to the atmosphere, in which CO2 is the major contributor accounting for 90 % of total global warming potential (GWP), leaving 2.8 % from CH4, and 7.2 % from N2O. Addition to the river input, the SWI releases GHGs to the overlying water with fluxes of 3.5 × 107, 10.8 × 104 and 0.7 × 104 mol d-1 for CO2, CH4 and N2O, respectively. Although all three GHGs exhibited emission to the atmosphere, our mass balance calculation showed that 16.9× 107 mol d-1 of CO2 and 1.0 × 104 mol d-1 of N2O were consumed, respectively, inside the estuary water body, while extra-production (13.8 × 104 mol d-1) of CH4 was demanded in the water body to support its output flux. This is the first experiment quantitatively assessing the importance of internal carbon and nitrogen biogeochemical processes in the PRE. Our finding is of guiding significance to constrain the GHGs budget and draw up realistic pathways for modeling works of GHGs prediction.
Collapse
Affiliation(s)
- Bin Chen
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China
| | - Ehui Tan
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Marine Science and Engineering, Hainan University, Haikou, Hainan, China.
| | - Wenbin Zou
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China
| | - Li-Li Han
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Marine Science and Engineering, Hainan University, Haikou, Hainan, China
| | - Li Tian
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China
| | - Shuh-Ji Kao
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China; State Key Laboratory of Marine Resource Utilization in South China Sea, School of Marine Science and Engineering, Hainan University, Haikou, Hainan, China.
| |
Collapse
|
9
|
Treby S, Grover SP. Carbon emissions from Australian Sphagnum peatlands increase with feral horse (Equus caballus) presence. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 347:119034. [PMID: 37832263 DOI: 10.1016/j.jenvman.2023.119034] [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: 03/22/2023] [Revised: 09/08/2023] [Accepted: 09/17/2023] [Indexed: 10/15/2023]
Abstract
Peatlands are globally significant carbon sinks, but when disturbed, have the potential to release carbon back to the atmosphere as greenhouse gases. Feral horse populations in the Australian Alps degrade Sphagnum peatlands, which are highly sensitive to disturbance. However, the link between this degradation and peatland carbon cycling is not understood. Here, we compared the autumn daytime carbon dioxide (CO2) and methane (CH4) fluxes of 12 alpine and subalpine Sphagnum peatlands in Kosciuszko National Park, Australia. The presence of feral horses at these sites was correlated with higher carbon loss: sites with horses were losing carbon to the atmosphere (4.83 and 8.18 g CO2-e m-2 d-1 in areas of Sphagnum moss and bare soil, respectively), whereas sites without horses were removing carbon from the atmosphere (-6.39 g CO2-e m-2 d-1). Sites with feral horses also had higher soil bulk density, temperature, and electrical conductivity (EC), and higher water pH, EC, and turbidity, than sites without horses. Our findings suggest that excluding feral horses from peatland areas could reduce rates of carbon loss to the atmosphere, in addition to improving overall site condition, peat soil condition, and water quality. We discuss potential management applications, further research, and restoration opportunities arising from these results.
Collapse
Affiliation(s)
- Sarah Treby
- Applied Chemistry and Environmental Science, RMIT University, GPO Box 2476, Melbourne, 3001, Australia.
| | - Samantha P Grover
- Applied Chemistry and Environmental Science, RMIT University, GPO Box 2476, Melbourne, 3001, Australia
| |
Collapse
|
10
|
Bansal S, Creed IF, Tangen BA, Bridgham SD, Desai AR, Krauss KW, Neubauer SC, Noe GB, Rosenberry DO, Trettin C, Wickland KP, Allen ST, Arias-Ortiz A, Armitage AR, Baldocchi D, Banerjee K, Bastviken D, Berg P, Bogard MJ, Chow AT, Conner WH, Craft C, Creamer C, DelSontro T, Duberstein JA, Eagle M, Fennessy MS, Finkelstein SA, Göckede M, Grunwald S, Halabisky M, Herbert E, Jahangir MMR, Johnson OF, Jones MC, Kelleway JJ, Knox S, Kroeger KD, Kuehn KA, Lobb D, Loder AL, Ma S, Maher DT, McNicol G, Meier J, Middleton BA, Mills C, Mistry P, Mitra A, Mobilian C, Nahlik AM, Newman S, O’Connell JL, Oikawa P, van der Burg MP, Schutte CA, Song C, Stagg CL, Turner J, Vargas R, Waldrop MP, Wallin MB, Wang ZA, Ward EJ, Willard DA, Yarwood S, Zhu X. Practical Guide to Measuring Wetland Carbon Pools and Fluxes. WETLANDS (WILMINGTON, N.C.) 2023; 43:105. [PMID: 38037553 PMCID: PMC10684704 DOI: 10.1007/s13157-023-01722-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 07/24/2023] [Indexed: 12/02/2023]
Abstract
Wetlands cover a small portion of the world, but have disproportionate influence on global carbon (C) sequestration, carbon dioxide and methane emissions, and aquatic C fluxes. However, the underlying biogeochemical processes that affect wetland C pools and fluxes are complex and dynamic, making measurements of wetland C challenging. Over decades of research, many observational, experimental, and analytical approaches have been developed to understand and quantify pools and fluxes of wetland C. Sampling approaches range in their representation of wetland C from short to long timeframes and local to landscape spatial scales. This review summarizes common and cutting-edge methodological approaches for quantifying wetland C pools and fluxes. We first define each of the major C pools and fluxes and provide rationale for their importance to wetland C dynamics. For each approach, we clarify what component of wetland C is measured and its spatial and temporal representativeness and constraints. We describe practical considerations for each approach, such as where and when an approach is typically used, who can conduct the measurements (expertise, training requirements), and how approaches are conducted, including considerations on equipment complexity and costs. Finally, we review key covariates and ancillary measurements that enhance the interpretation of findings and facilitate model development. The protocols that we describe to measure soil, water, vegetation, and gases are also relevant for related disciplines such as ecology. Improved quality and consistency of data collection and reporting across studies will help reduce global uncertainties and develop management strategies to use wetlands as nature-based climate solutions. Supplementary Information The online version contains supplementary material available at 10.1007/s13157-023-01722-2.
Collapse
Affiliation(s)
- Sheel Bansal
- U.S. Geological Survey, Northern Prairie Wildlife Research Center, Jamestown, ND USA
| | - Irena F. Creed
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto, ON Canada
| | - Brian A. Tangen
- U.S. Geological Survey, Northern Prairie Wildlife Research Center, Jamestown, ND USA
| | - Scott D. Bridgham
- Institute of Ecology and Evolution, University of Oregon, Eugene, OR USA
| | - Ankur R. Desai
- Department of Atmospheric and Oceanic Sciences, University of Wisconsin-Madison, Madison, WI USA
| | - Ken W. Krauss
- U.S. Geological Survey, Wetland and Aquatic Research Center, Lafayette, LA USA
| | - Scott C. Neubauer
- Department of Biology, Virginia Commonwealth University, Richmond, VA USA
| | - Gregory B. Noe
- U.S. Geological Survey, Florence Bascom Geoscience Center, Reston, VA USA
| | | | - Carl Trettin
- U.S. Forest Service, Pacific Southwest Research Station, Davis, CA USA
| | - Kimberly P. Wickland
- U.S. Geological Survey, Geosciences and Environmental Change Science Center, Denver, CO USA
| | - Scott T. Allen
- Department of Natural Resources and Environmental Science, University of Nevada, Reno, Reno, NV USA
| | - Ariane Arias-Ortiz
- Ecosystem Science Division, Department of Environmental Science, Policy and Management, University of California, Berkeley, CA USA
| | - Anna R. Armitage
- Department of Marine Biology, Texas A&M University at Galveston, Galveston, TX USA
| | - Dennis Baldocchi
- Department of Environmental Science, Policy and Management, University of California, Berkeley, CA USA
| | - Kakoli Banerjee
- Department of Biodiversity and Conservation of Natural Resources, Central University of Odisha, Koraput, Odisha India
| | - David Bastviken
- Department of Thematic Studies – Environmental Change, Linköping University, Linköping, Sweden
| | - Peter Berg
- Department of Environmental Sciences, University of Virginia, Charlottesville, VA USA
| | - Matthew J. Bogard
- Department of Biological Sciences, University of Lethbridge, Lethbridge, AB Canada
| | - Alex T. Chow
- Earth and Environmental Sciences Programme, The Chinese University of Hong Kong, Shatin, Hong Kong SAR China
| | - William H. Conner
- Baruch Institute of Coastal Ecology and Forest Science, Clemson University, Georgetown, SC USA
| | - Christopher Craft
- O’Neill School of Public and Environmental Affairs, Indiana University, Bloomington, IN USA
| | - Courtney Creamer
- U.S. Geological Survey, Geology, Minerals, Energy and Geophysics Science Center, Menlo Park, CA USA
| | - Tonya DelSontro
- Department of Earth and Environmental Sciences, University of Waterloo, Waterloo, ON Canada
| | - Jamie A. Duberstein
- Baruch Institute of Coastal Ecology and Forest Science, Clemson University, Georgetown, SC USA
| | - Meagan Eagle
- U.S. Geological Survey, Woods Hole Coastal & Marine Science Center, Woods Hole, MA USA
| | | | | | - Mathias Göckede
- Department for Biogeochemical Signals, Max Planck Institute for Biogeochemistry, Jena, Germany
| | - Sabine Grunwald
- Soil, Water and Ecosystem Sciences Department, University of Florida, Gainesville, FL USA
| | - Meghan Halabisky
- School of Environmental and Forest Sciences, University of Washington, Seattle, WA USA
| | | | | | - Olivia F. Johnson
- U.S. Geological Survey, Northern Prairie Wildlife Research Center, Jamestown, ND USA
- Departments of Biology and Environmental Studies, Kent State University, Kent, OH USA
| | - Miriam C. Jones
- U.S. Geological Survey, Florence Bascom Geoscience Center, Reston, VA USA
| | - Jeffrey J. Kelleway
- School of Earth, Atmospheric and Life Sciences and Environmental Futures Research Centre, University of Wollongong, Wollongong, NSW Australia
| | - Sara Knox
- Department of Geography, McGill University, Montreal, Canada
| | - Kevin D. Kroeger
- U.S. Geological Survey, Woods Hole Coastal & Marine Science Center, Woods Hole, MA USA
| | - Kevin A. Kuehn
- School of Biological, Environmental, and Earth Sciences, University of Southern Mississippi, Hattiesburg, MS USA
| | - David Lobb
- Department of Soil Science, University of Manitoba, Winnipeg, MB Canada
| | - Amanda L. Loder
- Department of Geography, University of Toronto, Toronto, ON Canada
| | - Shizhou Ma
- School of Environment and Sustainability, University of Saskatchewan, Saskatoon, SK Canada
| | - Damien T. Maher
- Faculty of Science and Engineering, Southern Cross University, Lismore, NSW Australia
| | - Gavin McNicol
- Department of Earth and Environmental Sciences, University of Illinois Chicago, Chicago, IL USA
| | - Jacob Meier
- U.S. Geological Survey, Northern Prairie Wildlife Research Center, Jamestown, ND USA
| | - Beth A. Middleton
- U.S. Geological Survey, Wetland and Aquatic Research Center, Lafayette, LA USA
| | - Christopher Mills
- U.S. Geological Survey, Geology, Geophysics, and Geochemistry Science Center, Denver, CO USA
| | - Purbasha Mistry
- School of Environment and Sustainability, University of Saskatchewan, Saskatoon, SK Canada
| | - Abhijit Mitra
- Department of Marine Science, University of Calcutta, Kolkata, West Bengal India
| | - Courtney Mobilian
- O’Neill School of Public and Environmental Affairs, Indiana University, Bloomington, IN USA
| | - Amanda M. Nahlik
- Office of Research and Development, Center for Public Health and Environmental Assessments, Pacific Ecological Systems Division, U.S. Environmental Protection Agency, Corvallis, OR USA
| | - Sue Newman
- South Florida Water Management District, Everglades Systems Assessment Section, West Palm Beach, FL USA
| | - Jessica L. O’Connell
- Department of Ecosystem Science and Sustainability, Colorado State University, Fort Collins, CO USA
| | - Patty Oikawa
- Department of Earth and Environmental Sciences, California State University, East Bay, Hayward, CA USA
| | - Max Post van der Burg
- U.S. Geological Survey, Northern Prairie Wildlife Research Center, Jamestown, ND USA
| | - Charles A. Schutte
- Department of Environmental Science, Rowan University, Glassboro, NJ USA
| | - Changchun Song
- Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, China
| | - Camille L. Stagg
- U.S. Geological Survey, Wetland and Aquatic Research Center, Lafayette, LA USA
| | - Jessica Turner
- Freshwater and Marine Science, University of Wisconsin-Madison, Madison, WI USA
| | - Rodrigo Vargas
- Department of Plant and Soil Sciences, University of Delaware, Newark, DE USA
| | - Mark P. Waldrop
- U.S. Geological Survey, Geology, Minerals, Energy and Geophysics Science Center, Menlo Park, CA USA
| | - Marcus B. Wallin
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Zhaohui Aleck Wang
- Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA USA
| | - Eric J. Ward
- U.S. Geological Survey, Wetland and Aquatic Research Center, Lafayette, LA USA
| | - Debra A. Willard
- U.S. Geological Survey, Florence Bascom Geoscience Center, Reston, VA USA
| | - Stephanie Yarwood
- Environmental Science and Technology, University of Maryland, College Park, MD USA
| | - Xiaoyan Zhu
- Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun, China
| |
Collapse
|
11
|
Ortega T, Jiménez-López D, Sierra A, Ponce R, Forja J. Greenhouse gas assemblages (CO 2, CH 4 and N 2O) in the continental shelf of the Gulf of Cadiz (SW Iberian Peninsula). THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 898:165474. [PMID: 37463626 DOI: 10.1016/j.scitotenv.2023.165474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 06/12/2023] [Accepted: 07/09/2023] [Indexed: 07/20/2023]
Abstract
This study examines the simultaneous water-atmosphere exchange of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) on the continental shelf of the Gulf of Cadiz, as well as the effect it has in terms of the radiative balance in the atmosphere, between 2014 and 2016. The experimental database consists of new measurements of the spatial and seasonal distribution of CO2 partial pressure (pCO2) and N2O concentration in 2016. pCO2 shows a wide range of variation influenced mainly by seasonal thermal variations (8.0 μatm 0C-1), as well as with the relative intensity of biological activity. There is experimental evidence of a progressive increase of pCO2 over the last 2 decades, with an estimated gradient of 4.2 ± 0.7 μatm y-1. During 2016, the Gulf of Cadiz acted as a slight source of CO2 to the atmosphere, with a mean flux of 0.4 ± 2.2 mmol m-2 d-1. The analysis of concentration variations in the water column shows that nitrification is the main N2O production process in the study area, although in the more coastal zone there are signs of inputs related to continental and sediment contributions, most probably induced by denitrification processes. In 2016, the Gulf of Cadiz acted as a weak sink of atmospheric N2O, with a mean flux of -0.1 ± 0.9 μmol m-2 d-1. From previous studies, performed with a similar methodology, an interannual database (2014-2016) of water-atmosphere fluxes of CO2, CH4 and N2O, normalized to the mean wind speed in the area, has been generated. Considering their respective Global Warming Potential (GWP) a joint greenhouse gasses (GHG) flux, expressed in CO2 equivalents of 0.6 ± 2.0 mmol m-2 d-1, has been estimated, which extended to the area of study indicates an approximate emission of 67.9 Gg CO2 y-1. However, although there is a high uncertainty associated with the spatial, temporal and interannual variations of CO2, CH4 and N2O fluxes in the Gulf of Cadiz, the exchange of greenhouse gasses could be influencing a radiative forcing increase in the atmosphere. When considering the available information on local and global estimates, the uncertainty about the effect of the joint exchange of GHGs to the atmosphere from the coastal seas increases significantly.
Collapse
Affiliation(s)
- T Ortega
- Dpto. Química-Física, INMAR, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Campus Universitario Río San Pedro, 11510 Puerto Real, Cádiz, Andalucía, Spain.
| | - D Jiménez-López
- Dpto. Química-Física, INMAR, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Campus Universitario Río San Pedro, 11510 Puerto Real, Cádiz, Andalucía, Spain
| | - A Sierra
- Dpto. Química-Física, INMAR, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Campus Universitario Río San Pedro, 11510 Puerto Real, Cádiz, Andalucía, Spain
| | - R Ponce
- Dpto. Química-Física, INMAR, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Campus Universitario Río San Pedro, 11510 Puerto Real, Cádiz, Andalucía, Spain
| | - J Forja
- Dpto. Química-Física, INMAR, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Campus Universitario Río San Pedro, 11510 Puerto Real, Cádiz, Andalucía, Spain
| |
Collapse
|
12
|
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.
Collapse
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.
| |
Collapse
|
13
|
Li L, Zhang L, Tang J, Xing H, Zhao L, Jie H, Jie Y. Waterlogging increases greenhouse gas release and decreases yield in winter rapeseed (Brassica napus L.) seedlings. Sci Rep 2023; 13:18673. [PMID: 37907706 PMCID: PMC10618276 DOI: 10.1038/s41598-023-46156-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Accepted: 10/28/2023] [Indexed: 11/02/2023] Open
Abstract
A sustainable future depends on increasing agricultural carbon (C) and nitrogen (N) sequestration. Winter rapeseeds are facing severe yield loss after waterlogging due to the effects of extreme rainfall, especially in the seedling stage, where rainfall is most sensitive. Uncertainty exists over the farming greenhouse gas (GHG) release of rapeseed seedlings following the onset of waterlogging. The effect of waterlogging on GHG release and leaf gas exchange in winter rapeseed was examined in a pot experiment. The experiment included waterlogging treatments lasting 7-day and 21-day and normal irrigation as a control treatment. According to our findings, (1) The ecosystem of rapeseed seedlings released methane (CH4) and nitrous oxide (N2O) in a clear up change that was impacted by ongoing waterlogging. Among them, N2O release had a transient rise during the early stages under the effect of seedling fertilizer. (2) The net photosynthetic rate, transpiration rate, stomatal conductance, plant height, soil moisture, and soil oxidation-reduction potential of rapeseed all significantly decreased due to the ongoing waterlogging. However, rapeseed leaves showed a significant increase in intercellular carbon dioxide (CO2) concentration and leaf chlorophyll content values after waterlogging. Additionally, the findings demonstrated an extremely significant increase in the sustained-flux global warming potential of the sum CO2-eq of CH4 and N2O throughout the entire waterlogging stress period. Therefore, continuous waterlogging can increase C and N release from rapeseed seedlings ecosystem and decrease yield. Therefore, we suggest increasing drainage techniques to decrease the release of agricultural GHGs and promote sustainable crop production.
Collapse
Affiliation(s)
- Linlin Li
- College of Agronomy, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China
| | - Lang Zhang
- College of Agronomy, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China.
- State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, 200241, People's Republic of China.
| | - Jianwu Tang
- State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, 200241, People's Republic of China
| | - Hucheng Xing
- College of Agronomy, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China
| | - Long Zhao
- College of Agronomy, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China
| | - Hongdong Jie
- College of Agronomy, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China
| | - Yucheng Jie
- College of Agronomy, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China.
- Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, Changsha, 410128, People's Republic of China.
| |
Collapse
|
14
|
Chang KY, Riley WJ, Collier N, McNicol G, Fluet-Chouinard E, Knox SH, Delwiche KB, Jackson RB, Poulter B, Saunois M, Chandra N, Gedney N, Ishizawa M, Ito A, Joos F, Kleinen T, Maggi F, McNorton J, Melton JR, Miller P, Niwa Y, Pasut C, Patra PK, Peng C, Peng S, Segers A, Tian H, Tsuruta A, Yao Y, Yin Y, Zhang W, Zhang Z, Zhu Q, Zhu Q, Zhuang Q. Observational constraints reduce model spread but not uncertainty in global wetland methane emission estimates. GLOBAL CHANGE BIOLOGY 2023; 29:4298-4312. [PMID: 37190869 DOI: 10.1111/gcb.16755] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 02/01/2023] [Indexed: 05/17/2023]
Abstract
The recent rise in atmospheric methane (CH4 ) concentrations accelerates climate change and offsets mitigation efforts. Although wetlands are the largest natural CH4 source, estimates of global wetland CH4 emissions vary widely among approaches taken by bottom-up (BU) process-based biogeochemical models and top-down (TD) atmospheric inversion methods. Here, we integrate in situ measurements, multi-model ensembles, and a machine learning upscaling product into the International Land Model Benchmarking system to examine the relationship between wetland CH4 emission estimates and model performance. We find that using better-performing models identified by observational constraints reduces the spread of wetland CH4 emission estimates by 62% and 39% for BU- and TD-based approaches, respectively. However, global BU and TD CH4 emission estimate discrepancies increased by about 15% (from 31 to 36 TgCH4 year-1 ) when the top 20% models were used, although we consider this result moderately uncertain given the unevenly distributed global observations. Our analyses demonstrate that model performance ranking is subject to benchmark selection due to large inter-site variability, highlighting the importance of expanding coverage of benchmark sites to diverse environmental conditions. We encourage future development of wetland CH4 models to move beyond static benchmarking and focus on evaluating site-specific and ecosystem-specific variabilities inferred from observations.
Collapse
Affiliation(s)
- Kuang-Yu Chang
- Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - William J Riley
- Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Nathan Collier
- Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
| | - Gavin McNicol
- Department of Earth and Environmental Sciences, University of Illinois Chicago, Chicago, Illinois, USA
| | | | - Sara H Knox
- Department of Geography, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Kyle B Delwiche
- Department of Environmental Science, Policy & Management, UC Berkeley, Berkeley, California, USA
| | - Robert B Jackson
- Department of Earth System Science, Stanford University, Stanford, California, USA
- Woods Institute for the Environment, Stanford University, Stanford, California, USA
- Precourt Institute for Energy, Stanford University, Stanford, California, USA
| | - Benjamin Poulter
- Biospheric Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
| | - Marielle Saunois
- Laboratoire des Sciences du Climat et de l'Environnement, LSCE-IPSL (CEA-CNRS-UVSQ), Université Paris-Saclay, Gif-sur-Yvette, France
| | - Naveen Chandra
- Institute of Arctic Climate and Environment Research (IACE), JAMSTEC, Yokohama, Japan
| | - Nicola Gedney
- Met Office Hadley Centre, Joint Centre for Hydrometeorological Research, Wallingford, UK
| | - Misa Ishizawa
- Climate Research Division, Environment and Climate Change Canada, Toronto, Ontario, Canada
| | - Akihiko Ito
- Earth System Division, National Institute for Environmental Studies (NIES), Tsukuba, Japan
| | - Fortunat Joos
- Climate and Environmental Physics, University of Bern, Bern, Switzerland
- Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland
| | | | - Federico Maggi
- School of Civil Engineering, The University of Sydney, Sydney, Australia
| | - Joe McNorton
- Research Department, European Centre for Medium-Range Weather Forecasts, Reading, UK
| | - Joe R Melton
- Climate Research Division, Environment and Climate Change Canada, Victoria, British Columbia, Canada
| | - Paul Miller
- Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden
- Centre for Environmental and Climate Science, Lund University, Lund, Sweden
| | - Yosuke Niwa
- Earth System Division, National Institute for Environmental Studies (NIES), Tsukuba, Japan
- Meteorological Research Institute (MRI), Tsukuba, Japan
| | - Chiara Pasut
- School of Civil Engineering, The University of Sydney, Sydney, Australia
- CSIRO Agriculture & Food, Urrbrae, South Australia, Australia
| | - Prabir K Patra
- Research Institute for Global Change, JAMSTEC, Yokohama, Japan
- Center for Environmental Remote Sensing, Chiba University, Chiba, Japan
| | - Changhui Peng
- College of Resources and Environmental Science, Hunan Normal University, Changsha, China
- Department of Biology Sciences, University of Québec at Montreal, Montreal, Québec, Canada
| | - Sushi Peng
- Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing, China
| | - Arjo Segers
- Netherlands Organisation for Applied Scientific Research (TNO), Utrecht, The Netherlands
| | - Hanqin Tian
- Department of Earth and Environmental Sciences, Schiller Institute for Integrated Science and Society, Boston College, Chestnut Hill, Massachusetts, USA
| | - Aki Tsuruta
- Finnish Meteorological Institute, Helsinki, Finland
| | - Yuanzhi Yao
- School of Geographic Sciences, East China Normal University, Shanghai, China
| | - Yi Yin
- Division of Geophysical and Planetary Science, California Institute of Technology, Pasadena, California, USA
| | - Wenxin Zhang
- Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden
| | - Zhen Zhang
- Earth System Science Interdisciplinary Center, University of Maryland, College Park, Maryland, USA
- Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
| | - Qing Zhu
- Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Qiuan Zhu
- College of Hydrology and Water Resources, Hohai University, Nanjing, China
| | - Qianlai Zhuang
- Department of Earth, Atmospheric, and Planetary Sciences, Department of Agronomy, Purdue University, Indiana, West Lafayette, USA
| |
Collapse
|
15
|
Song T, Liu Y, Kolton M, Wilson RM, Keller JK, Rolando JL, Chanton JP, Kostka JE. Porewater constituents inhibit microbially mediated greenhouse gas production (GHG) and regulate the response of soil organic matter decomposition to warming in anoxic peat from a Sphagnum-dominated bog. FEMS Microbiol Ecol 2023; 99:fiad060. [PMID: 37280172 DOI: 10.1093/femsec/fiad060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 05/16/2023] [Accepted: 06/05/2023] [Indexed: 06/08/2023] Open
Abstract
Northern peatlands store approximately one-third of terrestrial soil carbon. Climate warming is expected to stimulate the microbially mediated degradation of peat soil organic matter (SOM), leading to increasing greenhouse gas (GHG; carbon dioxide, CO2; methane, CH4) production and emission. Porewater dissolved organic matter (DOM) plays a key role in SOM decomposition; however, the mechanisms controlling SOM decomposition and its response to warming remain unclear. The temperature dependence of GHG production and microbial community dynamics were investigated in anoxic peat from a Sphagnum-dominated peatland. In this study, peat decomposition, which was quantified by GHG production and carbon substrate utilization is limited by terminal electron acceptors (TEA) and DOM, and these controls of microbially mediated SOM degradation are temperature-dependent. Elevated temperature led to a slight decrease in microbial diversity, and stimulated the growth of specific methanotrophic and syntrophic taxa. These results confirm that DOM is a major driver of decomposition in peatland soils contains inhibitory compounds, but the inhibitory effect is alleviated by warming.
Collapse
Affiliation(s)
- Tianze Song
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332, United States
| | - Yutong Liu
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332, United States
- Department of Civil & Environmental Engineering, Pennsylvania State University, University Park, University Park, PA 16802, United States
| | - Max Kolton
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332, United States
- French Associates Institute for Agriculture and Biotechnology of Drylands, Ben-Gurion, University of the Negev, Beer Sheva, 8499000, Israel
| | - Rachel M Wilson
- Department of Earth, Ocean & Atmospheric Science, Florida State University, Tallahassee, FL 32304, United States
| | - Jason K Keller
- Schmid College of Science and Technology, Chapman University, 1 University Dr, Orange, CA 92866, United States
| | - Jose L Rolando
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332, United States
| | - Jeffrey P Chanton
- Department of Earth, Ocean & Atmospheric Science, Florida State University, Tallahassee, FL 32304, United States
| | - Joel E Kostka
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332, United States
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30318, United States
- Center for Microbial Dynamics and Infection, Georgia Institute of Technology, Atlanta, GA 30332, United States
| |
Collapse
|
16
|
Baustian MM, Liu B, Moss LC, Dausman A, Pahl JW. Climate change mitigation potential of Louisiana's coastal area: Current estimates and future projections. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2023; 33:e2847. [PMID: 36932861 DOI: 10.1002/eap.2847] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 12/01/2022] [Accepted: 12/20/2022] [Indexed: 06/02/2023]
Abstract
Coastal habitats can play an important role in climate change mitigation. As Louisiana implements its climate action plan and the restoration and risk-reduction projects outlined in its 2017 Louisiana Coastal Master Plan, it is critical to consider potential greenhouse gas (GHG) fluxes in coastal habitats. This study estimated the potential climate mitigation role of existing, converted, and restored coastal habitats for years 2005, 2020, 2025, 2030, and 2050, which align with the Governor of Louisiana's GHG reduction targets. An analytical framework was developed that considered (1) available scientific data on net ecosystem carbon balance fluxes per habitat and (2) habitat areas projected from modeling efforts used for the 2017 Louisiana Coastal Master Plan to estimate the net GHG flux of coastal area. The coastal area was estimated as net GHG sinks of -38.4 ± 10.6 and -43.2 ± 12.0 Tg CO2 equivalents (CO2 e) in 2005 and 2020, respectively. The coastal area was projected to remain a net GHG sink in 2025 and 2030, both with and without the implementation of Coastal Master Plan projects (means ranged from -25.3 to -34.2 Tg CO2 e). By 2050, with model-projected wetland loss and conversion of coastal habitats to open water due to coastal erosion and relative sea level rise, Louisiana's coastal area was projected to become a net source of GHG emissions both with and without the Coastal Master Plan projects. However, in the year 2050, the Louisiana Coastal Master Plan project implementation was projected to avoid the release of +8.8 ± 1.3 Tg CO2 e compared with an alternative with no action. Reduction in current and future stressors to coastal habitats, including impacts from sea level rise, as well as the implementation of restoration projects could help to ensure coastal areas remain a natural climate solution.
Collapse
Affiliation(s)
- Melissa M Baustian
- The Water Institute of the Gulf, 1110 River Road South, Suite 200, Baton Rouge, Louisiana, 70802, USA
- U.S. Geological Survey, Wetland and Aquatic Research Center, Baton Rouge, Louisiana, 70808, USA
| | - Bingqing Liu
- The Water Institute of the Gulf, 1110 River Road South, Suite 200, Baton Rouge, Louisiana, 70802, USA
| | - Leland C Moss
- Abt Associates, 6130 Executive Boulevard, Rockville, Maryland, 20852, USA
| | - Alyssa Dausman
- The Water Institute of the Gulf, 1110 River Road South, Suite 200, Baton Rouge, Louisiana, 70802, USA
| | - James W Pahl
- Louisiana Coastal Protection and Restoration Authority, 150 Terrace Avenue, Baton Rouge, Louisiana, 70802, USA
| |
Collapse
|
17
|
Yang L, Zhang S, Lv X, Liu Y, Guo S, Hu X, Manirakiza B. Vallisneria natans decreased CH 4 fluxes in wetlands: Interactions among plant physiological status, nutrients and epiphytic bacterial community. ENVIRONMENTAL RESEARCH 2023; 224:115547. [PMID: 36822529 DOI: 10.1016/j.envres.2023.115547] [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: 12/22/2022] [Revised: 02/13/2023] [Accepted: 02/21/2023] [Indexed: 06/18/2023]
Abstract
Submerged macrophytes provide niches for epiphytic microbes (including aerobic methanotrophs) growth. However, little is known about the impacts of submerged macrophytes growth status and nutrients loadings on methanotroph community and methane release in wetlands. In the present study, methane fluxes, bacterial and methanotroph community in epiphytic biofilm, and environmental parameters were investigated during Vallisneria natans senescence in wetlands under low (VnL) and high (VnH) nutrients for seven weeks. Relative conductivity and concentration of H2O2, total chlorophyll and malondialdehyde were higher in leaves of V. natans in VnH than VnL at the same sampling time. Nutrients loading increased methane fluxes in treatments with or without (Control) macrophytes, while healthy V. natans plants reduced the methane flux and nutrients concentration in water columns. CH4 fluxes were positively correlated to temperature and COD (p < 0.05). Methane oxidation rates were 3.04-31.68 μmol methane mg-1 fresh weight of V. natans leaves - epiphytic biofilm within 1 h. Proteobacteria, Cyanobacteria, Bacteroidetes, Verrucomicrobia, Planctomycetes, Actinobacteria and Acidobacteria were dominant phylum in all epiphytic biofilms. The mean abundances of pmoA/16S rRNA were higher in VnL than VnH. According to Illumina sequencing results of pmoA gene, γ-proteobacteria and α-proteobacteria were the dominant methanotroph class in epiphytic biofilm from VnH and VnL, respectively. Among seven detected methanotrophic genera, Methylomonas was significantly higher in VnH than VnL. Network analysis revealed that there were much closer relationships between the environmental parameters and epiphytic bacterial community in VnH than in VnL. COD and MDA were negatively correlated with Methyloglobulus, Methylosarcina, Methylobacter and Methylocystis, but positively correlated with Methylomonas and Methylosinus. This study highlights that methanotrophs in epiphytic biofilm play important roles in methane-oxidizing, which can be affected by plant physiological status and environmental parameters.
Collapse
Affiliation(s)
- Liu Yang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, PR China; College of Environment, Hohai University, Nanjing, 210098, PR China
| | - Songhe Zhang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, PR China; College of Environment, Hohai University, Nanjing, 210098, PR China.
| | - Xin Lv
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, PR China; College of Environment, Hohai University, Nanjing, 210098, PR China
| | - Yuansi Liu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, PR China; College of Environment, Hohai University, Nanjing, 210098, PR China
| | - Shaozhuang Guo
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, PR China; College of Environment, Hohai University, Nanjing, 210098, PR China
| | - Xiuren Hu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, PR China; College of Environment, Hohai University, Nanjing, 210098, PR China
| | - Benjamin Manirakiza
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, PR China; College of Environment, Hohai University, Nanjing, 210098, PR China
| |
Collapse
|
18
|
Deshmukh CS, Susanto AP, Nardi N, Nurholis N, Kurnianto S, Suardiwerianto Y, Hendrizal M, Rhinaldy A, Mahfiz RE, Desai AR, Page SE, Cobb AR, Hirano T, Guérin F, Serça D, Prairie YT, Agus F, Astiani D, Sabiham S, Evans CD. Net greenhouse gas balance of fibre wood plantation on peat in Indonesia. Nature 2023; 616:740-746. [PMID: 37020018 PMCID: PMC10132972 DOI: 10.1038/s41586-023-05860-9] [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: 08/30/2022] [Accepted: 02/16/2023] [Indexed: 04/07/2023]
Abstract
Tropical peatlands cycle and store large amounts of carbon in their soil and biomass1-5. Climate and land-use change alters greenhouse gas (GHG) fluxes of tropical peatlands, but the magnitude of these changes remains highly uncertain6-19. Here we measure net ecosystem exchanges of carbon dioxide, methane and soil nitrous oxide fluxes between October 2016 and May 2022 from Acacia crassicarpa plantation, degraded forest and intact forest within the same peat landscape, representing land-cover-change trajectories in Sumatra, Indonesia. This allows us to present a full plantation rotation GHG flux balance in a fibre wood plantation on peatland. We find that the Acacia plantation has lower GHG emissions than the degraded site with a similar average groundwater level (GWL), despite more intensive land use. The GHG emissions from the Acacia plantation over a full plantation rotation (35.2 ± 4.7 tCO2-eq ha-1 year-1, average ± standard deviation) were around two times higher than those from the intact forest (20.3 ± 3.7 tCO2-eq ha-1 year-1), but only half of the current Intergovernmental Panel on Climate Change (IPCC) Tier 1 emission factor (EF)20 for this land use. Our results can help to reduce the uncertainty in GHG emissions estimates, provide an estimate of the impact of land-use change on tropical peat and develop science-based peatland management practices as nature-based climate solutions.
Collapse
Affiliation(s)
- Chandra S Deshmukh
- Asia Pacific Resources International Ltd., Pelalawan Regency, Indonesia.
| | - Ari P Susanto
- Asia Pacific Resources International Ltd., Pelalawan Regency, Indonesia
| | - Nardi Nardi
- Asia Pacific Resources International Ltd., Pelalawan Regency, Indonesia
| | - Nurholis Nurholis
- Asia Pacific Resources International Ltd., Pelalawan Regency, Indonesia
| | - Sofyan Kurnianto
- Asia Pacific Resources International Ltd., Pelalawan Regency, Indonesia
| | | | - M Hendrizal
- Asia Pacific Resources International Ltd., Pelalawan Regency, Indonesia
| | - Ade Rhinaldy
- Asia Pacific Resources International Ltd., Pelalawan Regency, Indonesia
| | - Reyzaldi E Mahfiz
- Asia Pacific Resources International Ltd., Pelalawan Regency, Indonesia
| | - Ankur R Desai
- Department of Atmospheric and Oceanic Sciences, University of Wisconsin-Madison, Madison, WI, USA
| | - Susan E Page
- School of Geography, Geology and the Environment, University of Leicester, Leicester, UK
| | - Alexander R Cobb
- Singapore-MIT Alliance for Research and Technology, Singapore, Singapore
| | - Takashi Hirano
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
| | - Frédéric Guérin
- Géosciences Environnement Toulouse, CNRS, IRD, Université Paul-Sabatier, Toulouse, France
| | - Dominique Serça
- LAERO, Université de Toulouse, CNRS, IRD, UT3, Toulouse, France
| | - Yves T Prairie
- UNESCO Chair in Global Environmental Change, Université du Québec à Montréal, Montréal, Québec, Canada
| | - Fahmuddin Agus
- National Research and Innovation Agency (BRIN), Cibinong, Indonesia
| | - Dwi Astiani
- Faculty of Forestry, Tanjungpura University, Pontianak, Indonesia
| | - Supiandi Sabiham
- Department of Soil Science and Land Resources, IPB University, Bogor, Indonesia
| | | |
Collapse
|
19
|
Zhang B, Zhang R, Li Y, Wang S, Xing F. Ignoring the Effects of Photovoltaic Array Deployment on Greenhouse Gas Emissions May Lead to Overestimation of the Contribution of Photovoltaic Power Generation to Greenhouse Gas Reduction. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:4241-4252. [PMID: 36867117 DOI: 10.1021/acs.est.3c00479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Photovoltaic (PV) power generation is one of the world's most promising options for carbon emission reduction. However, whether the operation period of solar parks can increase greenhouse gas (GHG) emissions in hosting natural ecosystems has not been fully considered. Here, we conducted a field experiment to compensate for the lack of evaluation of the effects of PV array deployment on GHG emissions. Our results show that the PV arrays caused significant differences in air microclimate, soil properties, and vegetation characteristics. Simultaneously, PV arrays had more significant effects on CO2 and N2O emissions but a minor impact on CH4 uptake in the growing season. Of all the environmental variables included, soil temperature and moisture were the main drivers of GHG flux variation. The sustained flux global warming potential from the PV arrays significantly increased by 8.14% compared to the ambient grassland. Our evaluation models identified that the GHG footprint of PV arrays during the operation period on grasslands was 20.62 g CO2-eq kW h-1. Compared with our model estimates, GHG footprint estimates reported in previous studies were generally less by 25.46-50.76%. The contribution of PV power generation to GHG reduction may be overestimated without considering the impact of PV arrays on hosting ecosystems.
Collapse
Affiliation(s)
- Bin Zhang
- Key Laboratory of Vegetation Ecology, Institute of Grassland Science, Ministry of Education, Northeast Normal University, Changchun 130024, China
- Jilin Songnen Grassland Ecosystem National Observation and Research Station, Changchun 130024, China
| | - Ruohui Zhang
- Key Laboratory of Vegetation Ecology, Institute of Grassland Science, Ministry of Education, Northeast Normal University, Changchun 130024, China
- Jilin Songnen Grassland Ecosystem National Observation and Research Station, Changchun 130024, China
| | - You Li
- Key Laboratory of Vegetation Ecology, Institute of Grassland Science, Ministry of Education, Northeast Normal University, Changchun 130024, China
- Jilin Songnen Grassland Ecosystem National Observation and Research Station, Changchun 130024, China
| | - Shiwen Wang
- Key Laboratory of Vegetation Ecology, Institute of Grassland Science, Ministry of Education, Northeast Normal University, Changchun 130024, China
- Jilin Songnen Grassland Ecosystem National Observation and Research Station, Changchun 130024, China
| | - Fu Xing
- Key Laboratory of Vegetation Ecology, Institute of Grassland Science, Ministry of Education, Northeast Normal University, Changchun 130024, China
- Jilin Songnen Grassland Ecosystem National Observation and Research Station, Changchun 130024, China
| |
Collapse
|
20
|
Phillips CL, Wang R, Mattox C, Trammell TLE, Young J, Kowalewski A. High soil carbon sequestration rates persist several decades in turfgrass systems: A meta-analysis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:159974. [PMID: 36347293 DOI: 10.1016/j.scitotenv.2022.159974] [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: 08/04/2022] [Revised: 10/19/2022] [Accepted: 11/01/2022] [Indexed: 06/16/2023]
Abstract
Managed turfgrass is a common component of urban landscapes that is expanding under current land use trends. Previous studies have reported high rates of soil carbon sequestration in turfgrass, but no systematic review has summarized these rates nor evaluated how they change as turfgrass ages. Here we conducted a meta-analysis of soil carbon sequestration rates from 63 studies globally, comprised mostly of C3 grass species in the U.S., including 24 chronosequence studies that evaluated carbon changes over 75 years or longer. We showed that turfgrass established within the last ten years had a positive mean soil C sequestration rate of 5.3 Mg CO2 ha-1 yr-1 (95% CI = 3.7-6.2), which is higher than rates reported for several soil conservation practices. Areas converted to turfgrass from forests were an exception, sometimes lost soil carbon, and had a cross-study mean sequestration rate that did not differ from 0. In some locations, soil C accumulated linearly with turfgrass age over several decades, but the major trend was for soil C accumulation rates to decline through time, reaching a cross-study mean sequestration rate that was not different from 0 at 50 years. We show that fitting soil C timeseries with a mechanistically derived function rather than purely empirical functions did not alter these conclusions, nor did employing equivalent soil mass versus fixed-depth carbon stock accounting. We conducted a partial greenhouse gas budget that estimated emissions from mowing, N-fertilizer production, and soil N2O emissions. When N fertilizer was applied, average maintenance emissions offset 32% of C sequestration in recently established turfgrass. Potential emission removals by turfgrass can be maximized with reduced-input management. Management decisions that avoid losing accrued soil C-both when turfgrass is first established and when it is eventually replaced with other land-uses-will also help maximize turfgrass C sequestration potential.
Collapse
Affiliation(s)
- Claire L Phillips
- USDA-Agricultural Research Service, Northwest Sustainable Agroecosystems Research Unit, P.O. Box 64621, Pullman, WA 99164, United States of America.
| | - Ruying Wang
- Department of Horticulture, Oregon State University, Corvallis, OR 97331, United States of America
| | - Clint Mattox
- Department of Horticulture, Oregon State University, Corvallis, OR 97331, United States of America
| | - Tara L E Trammell
- Department of Plant and Soil Sciences, University of Delaware, Newark, DE 19716, United States of America
| | - Joseph Young
- Department of Plant and Soil Science, Texas Tech University, Lubbock, TX 79409, United States of America
| | - Alec Kowalewski
- Department of Horticulture, Oregon State University, Corvallis, OR 97331, United States of America
| |
Collapse
|
21
|
Lin P, Du Z, Wang L, Liu J, Xu Q, Du J, Jiang R. Hotspots of riverine greenhouse gas (CH 4, CO 2, N 2O) emissions from Qinghai Lake Basin on the northeast Tibetan Plateau. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 857:159373. [PMID: 36240936 DOI: 10.1016/j.scitotenv.2022.159373] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 10/06/2022] [Accepted: 10/07/2022] [Indexed: 06/16/2023]
Abstract
Evasion of greenhouse gases (GHG) from fluvial systems is now recognized as a significant component of the global carbon cycle. However, the magnitudes of GHG fluxes remain uncertain due to limited research data, especially on the Tibetan Plateau. In this study Methane (CH4), carbon dioxide (CO2), and nitrous oxide (N2O) concentrations were measured and their diffusive fluxes were estimated by headspace-gas chromatography in two rivers basins (Buha and Shaliu rivers) on the Northeast Tibetan Plateau during three seasons from October 2020 to August 2021. The results showed that the focal rivers on the Tibetan Plateau are potentially important sources of GHG. Both rivers have higher GHG concentrations and diffusion flux during the snowmelt period than other seasons. In general, GHG diffusion fluxes in the Buha river were higher than those in the Shaliu river and their concentrations are higher in the upstream region than in the downstream region of both basins. The salinity in water and wind spread were found to be important factors influencing in GHGs diffusion fluxes. While diffusive fluxes of GHG in rivers were a small component of watershed-scale fluvial Carbon gas efflux compared to other studies, these fluxes will likely increase as thaw slump occurrence. Overall, this study highlights that better recognition of the influence that river networks have on global warming is required-especially when it comes to high-elevation rivers across permafrost, as permafrost will continue to thaw as climate warming.
Collapse
Affiliation(s)
- Penglin Lin
- College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China
| | - Zhiheng Du
- State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Lei Wang
- Advanced Interdisciplinary Institute of Environment and Ecology, Beijing Normal University, Zhuhai 519087, China
| | - Jingfeng Liu
- College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China.
| | - Qian Xu
- State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Jia Du
- College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China
| | - Rui Jiang
- College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China
| |
Collapse
|
22
|
Liu J, Chen Y, Wang Y, Du M, Wu Z. Greenhouse gases emissions and dissolved carbon export affected by submarine groundwater discharge in a maricultural bay, Hainan Island, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 857:159665. [PMID: 36302414 DOI: 10.1016/j.scitotenv.2022.159665] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 10/07/2022] [Accepted: 10/19/2022] [Indexed: 06/16/2023]
Abstract
Greenhouse gases (GHG) emissions in coastal areas are influenced by both mariculture and submarine groundwater discharge (SGD). In this study, we first conducted a comprehensive investigation on carbon dioxide (CO2) and methane (CH4) emissions affected by SGD in a typical maricultural bay in north-eastern Hainan Island, China. A radon (222Rn) mass balance model revealed considerable high SGD rates (179 ± 92 cm d-1) in the bay, and the fluxes of SGD-derived dissolved inorganic carbon (DIC) and dissolved organic carbon (DOC) were 150.36 and 3.65 g C m-2 d-1, respectively. Time-series measurement results, including those for 222Rn, CH4, CO2, and physicochemical parameters, indicated that GHG dynamics in the maricultural bay mainly varied with tidal fluctuations, and isotopic evidence further revealed that acetate fermentation was the main mechanism of methanogenesis in the maricultural waters. The water-air fluxes in the maricultural area were 1.05 ± 0.32 and 9.49 ± 3.96 mmol m-2 day-1 for CH4 and CO2, respectively, implying that Qinglan Bay was a potential source of GHG released into the atmosphere. At the bay-scale, the CO2 emissions followed a spatial pattern, and the CH4 emissions were mainly affected by mariculture. The high CH4 emissions in the maricultural waters caused by maricultural activities, SGD, high temperature, and special hydrology resulted in the formation of the CH4-dominated total CO2-equivalent emissions model. Our study highlights the importance of considering the link between SGD and GHG emissions in maricultural bays when constraining global GHG fluxes.
Collapse
Affiliation(s)
- Jiawei Liu
- State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
| | - Yuanqing Chen
- State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
| | - Yiqing Wang
- State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
| | - Mengran Du
- Deep Sea Science Division, Institute of Deep Sea Science and Engineering, Chinese Academy of Sciences, Sanya, China
| | - Zijun Wu
- State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China.
| |
Collapse
|
23
|
Pizarro L, Magalhães C, Almeida CMR, Carvalho MDF, Semedo M. Cadmium effects on net N2O production by the deep-sea isolate Shewanella loihica PV-4. FEMS Microbiol Lett 2023; 370:fnad047. [PMID: 37279908 PMCID: PMC10337742 DOI: 10.1093/femsle/fnad047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 05/19/2023] [Accepted: 06/01/2023] [Indexed: 06/08/2023] Open
Abstract
Deep-sea mining may lead to the release of high concentrations of metals into the surrounding seabed, which can disturb important ecosystem functions provided by microbial communities. Among these, the production of N2O and its reduction to N2 is of great relevance since N2O is an important greenhouse gas. Metal impacts on net N2O production by deep-sea bacteria are, however, currently unexplored. Here, we evaluated the effects of cadmium (Cd) on net N2O production by a deep-sea isolate, Shewanella loihica PV-4. We performed a series of Cd exposure incubations in oxic conditions and determined N2O fluxes during induced anoxic conditions, as well as the relative expression of the nitrite reductase gene (nirK), preceding N2O production, and N2O reductase gene (nosZ), responsible for N2O reduction. Net N2O production by S. loihica PV-4 exposed to Cd was strongly inhibited when compared to the control treatment (no metal). Both nirK and nosZ gene expression were inhibited in reactors with Cd, but nirK inhibition was stronger, supporting the lower net N2O production observed with Cd. The Cd inhibition of net N2O production observed in this study poses the question whether other deep-sea bacteria would undergo the same effects. Future studies should address this question as well as its applicability to complex communities and other physicochemical conditions, which remain to be evaluated.
Collapse
Affiliation(s)
- Leonor Pizarro
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Matosinhos 4450-208, Portugal
- Faculty of Biotechnology, Catholic University of Portugal, Porto 4169-005, Portugal
| | - Catarina Magalhães
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Matosinhos 4450-208, Portugal
- Department of Biology, Faculty of Sciences (FCUP), University of Porto, Porto 4169-007, Portugal
| | - C Marisa R Almeida
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Matosinhos 4450-208, Portugal
- Department of Chemistry and Biochemistry, Faculty of Sciences (FCUP), University of Porto, Porto 4169-007, Portugal
| | - Maria de Fátima Carvalho
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Matosinhos 4450-208, Portugal
- Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto 4050-313, Portugal
| | - Miguel Semedo
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Matosinhos 4450-208, Portugal
| |
Collapse
|
24
|
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.
Collapse
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
| |
Collapse
|
25
|
Temperature-Related N2O Emission and Emission Potential of Freshwater Sediment. Processes (Basel) 2022. [DOI: 10.3390/pr10122728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Nitrous oxide (N2O) is a major radiative forcing and stratospheric ozone-depleting gas. Among natural sources, freshwater ecosystems are significant contributors to N2O. Although temperature is a key factor determining the N2O emissions, the respective effects of temperature on emitted and dissolved N2O in the water column of freshwater ecosystems remain unclear. In this study, 48 h incubation experiments were performed at three different temperatures; 15 °C, 25 °C, and 35 °C. For each sample, N2O emission, dissolved N2O in the overlying water and denitrification rates were measured, and N2O-related functional genes were quantified at regular intervals. The highest N2O emission was observed at an incubation of 35 °C, which was 1.5 to 2.1 factors higher than samples incubated at 25 °C and 15 °C. However, the highest level of dissolved N2O and estimated exchange flux of N2O were both observed at 25 °C and were both approximately 2 factors higher than those at 35 °C and 15 °C. The denitrification rates increased significantly during the incubation period, and samples at 25 °C and 35 °C exhibited much greater rates than those at 15 °C, which is in agreement with the N2O emission of the three incubation temperatures. The NO3− decreased in relation to the increase of N2O emissions, which confirms the dominant role of denitrification in N2O generation. Indeed, the nirK type denitrifier, which constitutes part of the denitrification process, dominated the nirS type involved in N2O generation, and the nosZ II type N2O reducer was more abundant than the nosZ I type. The results of the current study indicate that higher temperatures (35 °C) result in higher N2O emissions, but incubation at moderate temperatures (25 °C) causes higher levels of dissolved N2O, which represent a potential source of N2O emissions from freshwater ecosystems.
Collapse
|
26
|
Yang P, Tang KW, Tong C, Lai DYF, Zhang L, Lin X, Yang H, Tan L, Zhang Y, Hong Y, Tang C, Lin Y. Conversion of coastal wetland to aquaculture ponds decreased N 2O emission: Evidence from a multi-year field study. WATER RESEARCH 2022; 227:119326. [PMID: 36368085 DOI: 10.1016/j.watres.2022.119326] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 10/18/2022] [Accepted: 11/03/2022] [Indexed: 06/16/2023]
Abstract
Land reclamation is a major threat to the world's coastal wetlands, and it may influence the biogeochemical cycling of nitrogen in coastal regions. Conversion of coastal marshes into aquaculture ponds is common in the Asian Pacific region, but its impacts on the production and emission of nitrogen greenhouse gases remain poorly understood. In this study, we compared N2O emission from a brackish marsh and converted shrimp aquaculture ponds in the Shanyutan wetland, the Min River Estuary in Southeast China over a three-year period. We also measured sediment and porewater properties, relevant functional gene abundance, sediment N2O production potential and denitrification potential in the two habitats. Results indicated that the pond sediment had lower N-substrate availability, lower ammonia oxidation (AOA and comammox Nitrospira amoA), nitrite reduction (nirK and nirS) and nitrous oxide reduction (nosZ Ⅰ and nosZ Ⅱ) gene abundance and lower N2O production and denitrification potentials than in marsh sediments. Consequently, N2O emission fluxes from the aquaculture ponds (range 5.4-251.8 μg m-2 h-1) were significantly lower than those from the marsh (12.6-570.7 μg m-2 h-1). Overall, our results show that conversion from marsh to shrimp aquaculture ponds in the Shanyutan wetland may have diminished nutrient input from the catchment, impacted the N-cycling microbial community and lowered N2O production capacity of the sediment, leading to lower N2O emissions. Better post-harvesting management of pond water and sediment may further mitigate N2O emissions caused by the aquaculture operation.
Collapse
Affiliation(s)
- Ping Yang
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China; Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou 350007, China.
| | - Kam W Tang
- Department of Biosciences, Swansea University, Swansea SA2 8PP, United Kingdom
| | - Chuan Tong
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China; Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou 350007, China.
| | - Derrick Y F Lai
- Department of Geography and Resource Management, The Chinese University of Hong Kong, Hong Kong, China
| | - Linhai Zhang
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China; Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou 350007, China
| | - Xiao Lin
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China; Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou 350007, China
| | - Hong Yang
- College of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, China; Department of Geography and Environmental Science, University of Reading, Reading RG6 6AB, United Kingdom
| | - Lishan Tan
- State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, China
| | - Yifei Zhang
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
| | - Yan Hong
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
| | - Chen Tang
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
| | - Yongxin Lin
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China; Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou 350007, China.
| |
Collapse
|
27
|
Zhou C, Zhang Y, Li S, Jiang Q, Chen H, Zhu T, Xu X, Liu H, Qiu S, Wu J, Nie M, Li B. Exogenous nitrogen from riverine exports promotes soil methane production in saltmarshes in China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:156203. [PMID: 35618128 DOI: 10.1016/j.scitotenv.2022.156203] [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: 12/12/2021] [Revised: 05/19/2022] [Accepted: 05/20/2022] [Indexed: 06/15/2023]
Abstract
Methane emissions from saltmarshes can potentially promote climate warming. Soil methane production is positively correlated with methane emissions from saltmarshes. Understanding the factors influencing soil methane production will improve the prediction of methane emissions, but an investigation of these factors has not been conducted in saltmarshes in China. We collected soils from native Phragmites australis and invasive Spartina alterniflora saltmarshes along the coast of China; the soil potential methane production (PMP) was determined by incubation experiments. The large-scale investigation results showed that the ratios of methanogens relative to sulfate-reducing bacteria (RMRS) and total organic carbon (TOC) were positively correlated with soil PMP for both species. Dissolved inorganic nitrogen (DIN) was positively correlated with the soil PMP of P. australis saltmarshes, and plant biomass was positively correlated with the soil PMP of S. alterniflora saltmarshes. Our results showed that exogenous nitrogen from riverine exports was positively correlated with DIN and plant biomass in both P. australis and S. alterniflora saltmarshes. In addition, exogenous nitrogen was also positively correlated with TOC in S. alterniflora saltmarshes. Consequently, exogenous nitrogen indirectly promoted soil methane production in P. australis saltmarshes by increasing the DIN and promoted soil methane production in S. alterniflora saltmarshes by enhancing the TOC and plant biomass. Moreover, we found that the promoting effect of DIN on the soil PMP of P. australis saltmarshes increased when the incubation temperature increased from 15 °C to 25 °C. Thus, the promoting effect of exogenous nitrogen on the soil methane production in P. australis saltmarshes might be strengthened in the peak of growing season. Our findings are the first to confirm that exogenous nitrogen inputs from rivers indirectly promote soil methane production in P. australis and S. alterniflora saltmarshes and provide new insights into the factors responsible for soil methane production in saltmarshes.
Collapse
Affiliation(s)
- Chenhao Zhou
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Yan Zhang
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Songshuo Li
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Qiuyue Jiang
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Hongyang Chen
- Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Ting Zhu
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Xiao Xu
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Hao Liu
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Shiyun Qiu
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Jihua Wu
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Ming Nie
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Bo Li
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai 200438, China; Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology and Centre for Invasion Biology, Institute of Biodiversity, School of Ecology and Environmental Science, Yunnan University, Kunming 650504, Yunnan, China.
| |
Collapse
|
28
|
Cui J, Lam SK, Xu S, Lai DYF. The response of soil-atmosphere greenhouse gas exchange to changing plant litter inputs in terrestrial forest ecosystems. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:155995. [PMID: 35588851 DOI: 10.1016/j.scitotenv.2022.155995] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 05/12/2022] [Accepted: 05/12/2022] [Indexed: 06/15/2023]
Abstract
Various global change factors (e.g. elevated CO2 concentrations, nitrogen deposition, etc.) can alter the amount of litterfall in terrestrial forests, which could subsequently lead to changes in the physical, chemical, and biological properties of forest soils. Yet, there is hitherto a lack of consensus on the role of litter in governing the soil-atmosphere exchange of greenhouse gases (GHGs) in forest ecosystems, which can significantly affect the overall climatic cooling impacts of forests as a net carbon sink. In this study, we carried out a meta-analysis of over 250 field observations to determine the response of soil GHG fluxes to in situ litter manipulation in global forests. Our results showed that overall, litter addition enhanced soil CO2 emissions from terrestrial forests by 26%, while litter removal reduced soil CO2 emissions from these forests by 26%. The negative response of soil CO2 emissions to litter removal was stronger in the tropical forests (-33%) than in the subtropical (-27%) and temperate (-21%) forests, and was significantly correlated with mean annual temperature and precipitation. Moreover, litter removal was observed to enhance soil CH4 uptake in tropical (+24%) and temperate (+9%) forests, but not in subtropical forests. Litter removal reduced N2O emissions from forest soils by 20% on average, with this negative effect increasing with mean annual precipitation. The duration of litter removal experiment was negatively correlated with the response of soil CO2 emissions but had no influence on the response of soil CH4 and N2O fluxes. We found that plant litter supply could alter soil GHG fluxes in forests by modulating the microclimate as well as the labile and recalcitrant soil carbon pools. Our findings highlighted the importance of considering the effects of changing plant litter inputs on soil-atmosphere GHG fluxes in terrestrial forests and their spatio-temporal variability in biogeochemical models.
Collapse
Affiliation(s)
- Jinglan Cui
- Department of Geography and Resource Management, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Shu Kee Lam
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Shan Xu
- Department of Geography and Resource Management, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Derrick Yuk Fo Lai
- Department of Geography and Resource Management, The Chinese University of Hong Kong, Shatin, Hong Kong; Centre for Environmental Policy and Resource Management, The Chinese University of Hong Kong, Shatin, Hong Kong, China.
| |
Collapse
|
29
|
Yang S, Chen Q, Zheng T, Chen Y, Zhao X, He Y, Sun W, Zhong S, Li Z, Wang J. Multiple metal(loid) contamination reshaped the structure and function of soil archaeal community. JOURNAL OF HAZARDOUS MATERIALS 2022; 436:129186. [PMID: 35643011 DOI: 10.1016/j.jhazmat.2022.129186] [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: 04/04/2022] [Revised: 05/11/2022] [Accepted: 05/16/2022] [Indexed: 06/15/2023]
Abstract
Archaea are important participants in biogeochemical cycles of metal(loid)-polluted ecosystems, whereas archaeal structure and function in response to metal(loid) contamination remain poorly understood. Here, the effects of multiple metal(loid) pollution on the structure and function of archaeal communities were investigated in three zones within an abandoned sewage reservoir. We found that the high-contamination zone (Zone I) had higher archaeal diversity but a lower habitat niche breadth, relative to the mid-contamination zone (Zone II) and low-contamination zone (Zone III). Particularly, metal-resistant species represented by potential methanogens were markedly enriched in Zone I (cumulative relative abundance: 32.24%) compared to Zone II (1.93%) and Zone III (0.10%), and closer inter-taxon connections and higher network complexity (based on node number, edge number, and degree) were also observed compared to other zones. Meanwhile, the higher abundances of potential metal-resistant and methanogenic functions in Zone I (0.24% and 9.24%, respectively) than in Zone II (0.08% and 7.52%) and Zone III (0.01% and 1.03%) suggested archaeal functional adaptation to complex metal(loid) contamination. More importantly, six bioavailable metal(loid)s (titanium, tin, nickel, chromium, cobalt, and zinc) were the main contributors to archaeal community variations, and metal(loid) pollution reinforced the role of deterministic processes, particularly homogeneous selection, in the archaeal community assembly. Overall, this study provides the first integrated insight into the survival strategies of archaeal communities under multiple metal(loid) contamination, which will be of significant guidance for future bioremediation and environmental governance of metal(loid)-contaminated environments.
Collapse
Affiliation(s)
- Shanqing Yang
- College of Environmental Sciences and Engineering, Peking University, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China
| | - Qian Chen
- College of Environmental Sciences and Engineering, Peking University, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China
| | - Tong Zheng
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, China
| | - Ying Chen
- College of Environmental Sciences and Engineering, Peking University, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China; School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Xiaohui Zhao
- College of Environmental Sciences and Engineering, Peking University, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China; School of Water Resources and Hydropower Engineering, Xi'an University of Technology, Xi'an 710048, China
| | - Yifan He
- College of Environmental Sciences and Engineering, Peking University, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China; School of Water Resources and Hydropower Engineering, Xi'an University of Technology, Xi'an 710048, China
| | - Weiling Sun
- College of Environmental Sciences and Engineering, Peking University, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China
| | - Sining Zhong
- Fujian Agriculture and Forestry University, College of Resources and Environment, Fuzhou 350002, China
| | - Zhilong Li
- College of Environmental Sciences and Engineering, Peking University, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China; State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, China
| | - Jiawen Wang
- College of Environmental Sciences and Engineering, Peking University, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China.
| |
Collapse
|
30
|
Yang P, Lai DYF, Yang H, Lin Y, Tong C, Hong Y, Tian Y, Tang C, Tang KW. Large increase in CH 4 emission following conversion of coastal marsh to aquaculture ponds caused by changing gas transport pathways. WATER RESEARCH 2022; 222:118882. [PMID: 35882096 DOI: 10.1016/j.watres.2022.118882] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 07/15/2022] [Accepted: 07/18/2022] [Indexed: 06/15/2023]
Abstract
Methane emissions from aquatic ecosystems play an important role in global carbon cycle and climate change. Reclamation of coastal wetlands for aquaculture use has been shown to have opposite effects on sediment CH4 production potential and CH4 emission flux, but the underlying mechanism remained unclear. In this study, we compared sediment properties, CH4 production potential, emission flux, and CH4 transport pathways between a brackish marsh and the nearby reclaimed aquaculture ponds in the Min River Estuary in southeastern China. Despite that the sediment CH4 production potential in the ponds was significantly lower than the marsh, CH4 emission flux in the ponds (17.4 ± 2.7 mg m-2 h-1) was 11.9 times higher than the marsh (1.3 ± 0.2 mg m-2 h-1). Plant-mediated transport accounted for 75% of the total CH4 emission in the marsh, whereas ebullition accounted for 95% of the total CH4 emission in the ponds. CH4 emission fluxes in both habitat types were highest in the summer. These results suggest that the increase in CH4 emission following the conversion of brackish marsh to aquaculture ponds was not caused by increased sediment CH4 production, but rather by eliminating rhizospheric oxidation and shifting the major transport pathway to ebullition, allowing sediment CH4 to bypass oxidative loss. This study improves our understanding of the impacts of modification of coastal wetlands on greenhouse gas dynamics.
Collapse
Affiliation(s)
- Ping Yang
- Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou 350007, PR China; School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, PR China.
| | - Derrick Y F Lai
- Department of Geography and Resource Management, The Chinese University of Hong Kong, Hong Kong, PR 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
| | - Yongxin Lin
- Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou 350007, PR China; School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, PR China
| | - Chuan Tong
- Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou 350007, PR China; School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, PR China.
| | - Yan Hong
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, PR China
| | - Yalan Tian
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, PR China
| | - Chen Tang
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, PR China
| | - Kam W Tang
- Department of Biosciences, Swansea University, Swansea SA2 8PP, UK.
| |
Collapse
|
31
|
Malerba ME, Lindenmayer DB, Scheele BC, Waryszak P, Yilmaz IN, Schuster L, Macreadie PI. Fencing farm dams to exclude livestock halves methane emissions and improves water quality. GLOBAL CHANGE BIOLOGY 2022; 28:4701-4712. [PMID: 35562855 PMCID: PMC9327511 DOI: 10.1111/gcb.16237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 05/07/2022] [Accepted: 05/10/2022] [Indexed: 06/15/2023]
Abstract
Agricultural practices have created tens of millions of small artificial water bodies ("farm dams" or "agricultural ponds") to provide water for domestic livestock worldwide. Among freshwater ecosystems, farm dams have some of the highest greenhouse gas (GHG) emissions per m2 due to fertilizer and manure run-off boosting methane production-an extremely potent GHG. However, management strategies to mitigate the substantial emissions from millions of farm dams remain unexplored. We tested the hypothesis that installing fences to exclude livestock could reduce nutrients, improve water quality, and lower aquatic GHG emissions. We established a large-scale experiment spanning 400 km across south-eastern Australia where we compared unfenced (N = 33) and fenced farm dams (N = 31) within 17 livestock farms. Fenced farm dams recorded 32% less dissolved nitrogen, 39% less dissolved phosphorus, 22% more dissolved oxygen, and produced 56% less diffusive methane emissions than unfenced dams. We found no effect of farm dam management on diffusive carbon dioxide emissions and on the organic carbon in the soil. Dissolved oxygen was the most important variable explaining changes in carbon fluxes across dams, whereby doubling dissolved oxygen from 5 to 10 mg L-1 led to a 74% decrease in methane fluxes, a 124% decrease in carbon dioxide fluxes, and a 96% decrease in CO2 -eq (CH4 + CO2 ) fluxes. Dams with very high dissolved oxygen (>10 mg L-1 ) showed a switch from positive to negative CO2 -eq. (CO2 + CH4 ) fluxes (i.e., negative radiative balance), indicating a positive contribution to reduce atmospheric warming. Our results demonstrate that simple management actions can dramatically improve water quality and decrease methane emissions while contributing to more productive and sustainable farming.
Collapse
Affiliation(s)
- Martino E. Malerba
- Centre for Integrative Ecology, School of Life and Environmental SciencesDeakin UniversityMelbourneVictoriaAustralia
| | - David B. Lindenmayer
- Sustainable Farms, Fenner School of Environment and SocietyThe Australian National UniversityCanberraAustralian Capital TerritoryAustralia
| | - Ben C. Scheele
- Sustainable Farms, Fenner School of Environment and SocietyThe Australian National UniversityCanberraAustralian Capital TerritoryAustralia
| | - Pawel Waryszak
- Centre for Integrative Ecology, School of Life and Environmental SciencesDeakin UniversityMelbourneVictoriaAustralia
| | - I. Noyan Yilmaz
- Centre for Integrative Ecology, School of Life and Environmental SciencesDeakin UniversityMelbourneVictoriaAustralia
| | - Lukas Schuster
- Centre of Geometric Biology, School of Biological SciencesMonash UniversityMelbourneVictoriaAustralia
| | - Peter I. Macreadie
- Centre for Integrative Ecology, School of Life and Environmental SciencesDeakin UniversityMelbourneVictoriaAustralia
| |
Collapse
|
32
|
Yang P, Tang KW, Tong C, Lai DYF, Wu L, Yang H, Zhang L, Tang C, Hong Y, Zhao G. Changes in sediment methanogenic archaea community structure and methane production potential following conversion of coastal marsh to aquaculture ponds. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 305:119276. [PMID: 35405221 DOI: 10.1016/j.envpol.2022.119276] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 03/08/2022] [Accepted: 04/05/2022] [Indexed: 06/14/2023]
Abstract
Widespread conversion of coastal wetlands into aquaculture ponds in coastal region often results in degradation of the wetland ecosystems, but its effects on sediment's potential to produce greenhouse gases remain unclear. Using field sampling, incubation experiments and molecular analysis, we studied the sediment CH4 production potential and the relevant microbial communities in a brackish marsh and the nearby aquaculture ponds in the Min River Estuary in southeastern China. Sediment CH4 production potential was higher in the summer and autumn months than in spring and winter months, and it was significantly correlated with sediment carbon content among all environmental variables. The mean sediment CH4 production potential in the aquaculture ponds (20.1 ng g-1 d-1) was significantly lower than that in the marsh (45.2 ng g-1 d-1). While Methanobacterium dominated in both habitats (41-59%), the overall composition of sediment methanogenic archaea communities differed significantly between the two habitats (p < 0.05) and methanogenic archaea alpha diversity was lower in the aquaculture ponds (p < 0.01). Network analysis revealed that interactions between sediment methanogenic archaea were much weaker in the ponds than in the marsh. Overall, these findings suggest that conversion of marsh land to aquaculture ponds significantly altered the sediment methanogenic archaea community structure and diversity and lowered the sediment's capacity to produce CH4.
Collapse
Affiliation(s)
- Ping Yang
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, PR China; Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350007, PR China; Research Centre of Wetlands in Subtropical Region, Fujian Normal University, Fuzhou, 350007, PR China.
| | - Kam W Tang
- Department of Biosciences, Swansea University, Swansea, SA2 8PP, UK
| | - Chuan Tong
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, PR China; Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350007, PR China; Research Centre of Wetlands in Subtropical Region, Fujian Normal University, Fuzhou, 350007, PR China
| | - Derrick Y F Lai
- Department of Geography and Resource Management, The Chinese University of Hong Kong, Hong Kong, China
| | - Lianzuan Wu
- Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350007, PR China
| | - Hong Yang
- College of Environmental Science and Engineering, Fujian Normal University, Fuzhou, 350007, China; Department of Geography and Environmental Science, University of Reading, Reading, UK
| | - Linhai Zhang
- School of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, PR China; Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350007, PR China; Research Centre of Wetlands in Subtropical Region, Fujian Normal University, Fuzhou, 350007, PR China
| | - Chen Tang
- Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350007, PR China
| | - Yan Hong
- Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350007, PR China
| | - Guanghui Zhao
- Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350007, PR China
| |
Collapse
|
33
|
Lu B, Song L, Zang S, Wang H. Warming promotes soil CO 2 and CH 4 emissions but decreasing moisture inhibits CH 4 emissions in the permafrost peatland of the Great Xing'an Mountains. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 829:154725. [PMID: 35331769 DOI: 10.1016/j.scitotenv.2022.154725] [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: 10/18/2021] [Revised: 03/06/2022] [Accepted: 03/17/2022] [Indexed: 06/14/2023]
Abstract
Permafrost peatlands, as large soil carbon pools, are sensitive to global warming. However, the effects of temperature, moisture, and their interactions on carbon emissions in the permafrost peatlands remain unclear, when considering the availability of soil matrixes. The permafrost peatland (0-50 cm soil) in the Great Xing'an Mountains was selected to explore the deficiency. The cumulative carbon dioxide (CO2) and methane (CH4) emissions from soil were measured under different temperatures (5 °C, 10 °C, and 15 °C) and moisture content (130%, 100%, and 70%) treatments by the indoor incubation. The results showed that the soil carbon and nitrogen matrix determined soil carbon emissions. Warming affected the availability of soil carbon and nitrogen substrates, thus stimulating microbial activity and increasing soil carbon emissions. With soil temperature increasing by 10 °C, soil CO2 and CH4 emission rates increased by 5.1-9.4 and 3.8-6.4 times respectively. Warming promoted soil carbon emissions, and the decrease of moisture content promoted CO2 emissions but inhibited CH4 emissions in the permafrost peatland. Soil moisture and the carbon and nitrogen matrix determined the intensity of CO2 and CH4 emissions. The results were important to assess soil carbon emissions from permafrost peatlands under the impact of future climate warming and to formulate carbon emission reduction policies.
Collapse
Affiliation(s)
- Boquan Lu
- Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University, Harbin 150025, China; Heilongjiang Province Collaborative Innovation Center of Cold Region Ecological Safety, Harbin 150025, China
| | - Liquan Song
- Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University, Harbin 150025, China; Heilongjiang Province Collaborative Innovation Center of Cold Region Ecological Safety, Harbin 150025, China
| | - Shuying Zang
- Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University, Harbin 150025, China; Heilongjiang Province Collaborative Innovation Center of Cold Region Ecological Safety, Harbin 150025, China.
| | - Hanxi Wang
- Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University, Harbin 150025, China; Heilongjiang Province Collaborative Innovation Center of Cold Region Ecological Safety, Harbin 150025, China; School of Environment, Northeast Normal University, Jingyue Street 2555, Changchun, 130117 Jilin, China.
| |
Collapse
|
34
|
Zhang D, He J, Xu W, Li S, Liu H, Chai X. Carbon dioxide and methane fluxes from mariculture ponds: The potential of sediment improvers to reduce carbon emissions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 829:154610. [PMID: 35307438 DOI: 10.1016/j.scitotenv.2022.154610] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 03/12/2022] [Accepted: 03/12/2022] [Indexed: 06/14/2023]
Abstract
The CO2 and CH4 fluxes across the water-air interface were determined in two groups of swimming crab (Portunus trituberculatus)-ridgetail white prawn (Exopalaemon carinicauda) polyculture ponds. One group of ponds with sediment improver application were referred to as SAPs, and the other group receiving no sediment improver were as NSPs. During the farming season, both the SAPs and NSPs acted as CO2 sinks and CH4 sources. The cumulative CO2-C fluxes from the SAPs and NSPs were -26.78 and -23.49 g m-2, respectively, and the cumulative CH4-C emissions from the SAPs and NSPs were 0.24 and 0.28 g m-2, respectively. CO2 fluxes were significantly related to net primary production and water pH, and CH4 fluxes were mainly regulated by water temperature during the farming season. The application of the oxidation-based sediment improver had a positive effect on reducing the CH4 emissions across the water-air interface but had no effect on CO2 fluxes. The sediment improver reduced the organic matter contents and improved the sediment pH and redox potential, which may have facilitated a decrease in CH4 production in the sediment. The CO2 produced through the oxidation of organic material in the sediment may have been absorbed by strong photosynthesis, resulting in a nonsignificant difference in CO2 fluxes between the SAPs and NSPs. The results indicated that the application of sediment improvers in coastal polyculture ponds can reduce carbon emissions, especially CH4 emissions, during the farming period and could help mitigate global warming with regard to the sustained-flux global warming potential (SGWP) and sustained-flux global cooling potential (SGCP) models over a 20-year time horizon. Future studies on the CO2 and CH4 production rates of the sediment and the related microbial community could improve our understanding of the effect mechanism of the application of sediment improvers on CO2 and CH4 emissions from mariculture ponds.
Collapse
Affiliation(s)
- Dongxu Zhang
- Zhejiang Province Key Laboratory of Mariculture and Enhancement, Zhejiang Marine Fisheries Research Institute, Zhoushan 316021, PR China
| | - Jie He
- Zhejiang Province Key Laboratory of Mariculture and Enhancement, Zhejiang Marine Fisheries Research Institute, Zhoushan 316021, PR China
| | - Wenjun Xu
- Zhejiang Province Key Laboratory of Mariculture and Enhancement, Zhejiang Marine Fisheries Research Institute, Zhoushan 316021, PR China.
| | - Shuang Li
- Marine Science and Technology College, Zhejiang Ocean University, Zhoushan 316022, PR China
| | - Huiling Liu
- Zhejiang Province Key Laboratory of Mariculture and Enhancement, Zhejiang Marine Fisheries Research Institute, Zhoushan 316021, PR China; Marine and Fisheries Institute, Zhejiang Ocean University, Zhoushan 316021, PR China
| | - Xinru Chai
- Zhejiang Province Key Laboratory of Mariculture and Enhancement, Zhejiang Marine Fisheries Research Institute, Zhoushan 316021, PR China; Marine and Fisheries Institute, Zhejiang Ocean University, Zhoushan 316021, PR China
| |
Collapse
|
35
|
Freeman BWJ, Evans CD, Musarika S, Morrison R, Newman TR, Page SE, Wiggs GFS, Bell NGA, Styles D, Wen Y, Chadwick DR, Jones DL. Responsible agriculture must adapt to the wetland character of mid-latitude peatlands. GLOBAL CHANGE BIOLOGY 2022; 28:3795-3811. [PMID: 35243734 PMCID: PMC9314663 DOI: 10.1111/gcb.16152] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 01/31/2022] [Indexed: 06/14/2023]
Abstract
Drained, lowland agricultural peatlands are greenhouse gas (GHG) emission hotspots and a large but vulnerable store of irrecoverable carbon. They exhibit soil loss rates of ~2.0 cm yr-1 and are estimated to account for 32% of global cropland emissions while producing only 1.1% of crop kilocalories. Carbon dioxide emissions account for >80% of their terrestrial GHG emissions and are largely controlled by water table depth. Reducing drainage depths is, therefore, essential for responsible peatland management. Peatland restoration can substantially reduce emissions. However, this may conflict with societal needs to maintain productive use, to protect food security and livelihoods. Wetland agriculture strategies will, therefore, be required to adapt agriculture to the wetland character of peatlands, and balance GHG mitigation against productivity, where halting emissions is not immediately possible. Paludiculture may substantially reduce GHG emissions but will not always be viable in the current economic landscape. Reduced drainage intensity systems may deliver partial reductions in the rate of emissions, with smaller modifications to existing systems. These compromise systems may face fewer hurdles to adoption and minimize environmental harm until societal conditions favour strategies that can halt emissions. Wetland agriculture will face agronomic, socio-economic and water management challenges, and careful implementation will be required. Diversity of values and priorities among stakeholders creates the potential for conflict. Successful implementation will require participatory research approaches and co-creation of workable solutions. Policymakers, private sector funders and researchers have key roles to play but adoption risks would fall predominantly on land managers. Development of a robust wetland agriculture paradigm is essential to deliver resilient production systems and wider environmental benefits. The challenge of responsible use presents an opportunity to rethink peatland management and create thriving, innovative and green wetland landscapes for everyone's future benefit, while making a vital contribution to global climate change mitigation.
Collapse
Affiliation(s)
| | | | | | - Ross Morrison
- UK Centre for Ecology and HydrologyWallingfordOxfordshireUK
| | - Thomas R. Newman
- School of Geography, Geology and the EnvironmentUniversity of LeicesterLeicesterLeicestershireUK
| | - Susan E. Page
- School of Geography, Geology and the EnvironmentUniversity of LeicesterLeicesterLeicestershireUK
| | - Giles F. S. Wiggs
- School of Geography and the EnvironmentUniversity of OxfordOxfordOxfordshireUK
| | | | - David Styles
- Ryan InstituteNational University of Ireland GalwayGalwayIreland
| | - Yuan Wen
- School of Natural SciencesBangor UniversityBangorGwyneddUK
- College of Agronomy and BiotechnologyChina Agricultural UniversityBeijingChina
| | | | - Davey L. Jones
- School of Natural SciencesBangor UniversityBangorGwyneddUK
- SoilsWestCentre for Sustainable Farming SystemsFood Futures InstituteMurdoch UniversityMurdochWestern AustraliaAustralia
| |
Collapse
|
36
|
Zhu C, Luo H, Luo L, Wang K, Liao Y, Zhang S, Huang S, Guo X, Zhang L. Nitrogen and Biochar Addition Affected Plant Traits and Nitrous Oxide Emission From Cinnamomum camphora. FRONTIERS IN PLANT SCIENCE 2022; 13:905537. [PMID: 35620695 PMCID: PMC9127667 DOI: 10.3389/fpls.2022.905537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Accepted: 04/14/2022] [Indexed: 06/15/2023]
Abstract
Atmospheric nitrous oxide (N2O) increase contributes substantially to global climate change due to its large global warming potential. Soil N2O emissions have been widely studied, but plants have so far been ignored, even though they are known as an important source of N2O. The specific objectives of this study are to (1) reveal the effects of nitrogen and biochar addition on plant functional traits and N2O emission of Cinnamomum camphora seedlings; (2) find out the possible leaf traits affecting plant N2O emissions. The effects of nitrogen and biochar on plant functional traits and N2O emissions from plants using C. camphora seedlings were investigated. Plant N2O emissions, growth, each organ biomass, each organ nutrient allocation, gas exchange parameters, and chlorophyll fluorescence parameters of C. camphora seedlings were measured. Further investigation of the relationships between plant N2O emission and leaf traits was performed by simple linear regression analysis, principal component analysis (PCA), and structural equation model (SEM). It was found that nitrogen addition profoundly increased cumulative plant N2O emissions (+109.25%), which contributed substantially to the atmosphere's N2O budget in forest ecosystems. Plant N2O emissions had a strong correlation to leaf traits (leaf TN, P n , G s , C i , Tr, WUE L , α, ETR max, I k , Fv/Fm, Y(II), and SPAD). Structural equation modelling revealed that leaf TN, leaf TP, P n , C i , Tr, WUE L , α, ETR max, and I k were key traits regulating the effects of plants on N2O emissions. These results provide a direction for understanding the mechanism of N2O emission from plants and provide a theoretical basis for formulating corresponding emission reduction schemes.
Collapse
Affiliation(s)
- Congfei Zhu
- Key Laboratory of Silviculture, Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang, China
| | - Handong Luo
- Key Laboratory of Silviculture, Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang, China
- Geological Environment Monitoring Station, Meizhou Natural Resources Bureau, Meizhou, China
| | - Laicong Luo
- Key Laboratory of Silviculture, Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang, China
| | - Kunying Wang
- Key Laboratory of Silviculture, Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang, China
| | - Yi Liao
- Key Laboratory of Silviculture, Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang, China
| | - Shun Zhang
- Key Laboratory of Silviculture, Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang, China
| | - Shenshen Huang
- Key Laboratory of Silviculture, Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang, China
| | - Xiaomin Guo
- Key Laboratory of Silviculture, Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang, China
| | - Ling Zhang
- Key Laboratory of Silviculture, Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang, China
| |
Collapse
|
37
|
White SA, Morris SA, Wadnerkar PD, Woodrow RL, Tucker JP, Holloway CJ, Conrad SR, Sanders CJ, Hessey S, Santos IR. Anthropogenic nitrate attenuation versus nitrous oxide release from a woodchip bioreactor. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 300:118814. [PMID: 35063543 DOI: 10.1016/j.envpol.2022.118814] [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: 08/27/2021] [Revised: 11/15/2021] [Accepted: 01/06/2022] [Indexed: 06/14/2023]
Abstract
Nitrogen loss via overland flow from agricultural land use is a global threat to waterways. On-farm denitrifying woodchip bioreactors can mitigate NO3- exports by increasing denitrification capacity. However, denitrification in sub-optimal conditions releases the greenhouse gas nitrous oxide (N2O), swapping the pollution from aquatic to atmospheric reservoirs. Here, we assess NO3--N removal and N2O emissions from a new edge-of-field surface-flow bioreactor during ten rain events on intensive farming land. Nitrate removal rates (NRR) varied between 5.4 and 76.2 g NO3--N m-3 wetted woodchip d-1 with a mean of 30.3 ± 7.3 g NO3--N m-3. The nitrate removal efficiency (NRE) was ∼73% in ideal hydrological conditions and ∼18% in non-ideal conditions. The fraction of NO3--N converted to N2O (rN2O) in the bioreactor was ∼3.3 fold lower than the expected 0.75% IPCC emission factor. We update the global bioreactor estimated Q10 (NRR increase every 10 °C) from a recent meta-analysis with previously unavailable data to >20 °C, yielding a new global Q10 factor of 3.1. Mean N2O CO2-eq emissions (431.9 ± 125.4 g CO2-eq emissions day-1) indicate that the bioreactor was not significantly swapping aquatic NO3- for N2O pollution. Our estimated NO3--N removal from the bioreactor (9.9 kg NO3--N ha-1 yr-1) costs US$13.14 per kg NO3--N removed and represents ∼30% NO3--N removal when incorporating all flow and overflow events. Overall, edge-of-field surface-flow bioreactors seem to be a cost-effective solution to reduce NO3--N runoff with minor pollution swapping to N2O.
Collapse
Affiliation(s)
- Shane A White
- National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW, Australia.
| | - Shaun A Morris
- North Coast Local Land Services, Coffs Harbour, NSW, Australia
| | - Praktan D Wadnerkar
- National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW, Australia
| | - Rebecca L Woodrow
- National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW, Australia
| | - James P Tucker
- National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW, Australia
| | - Ceylena J Holloway
- National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW, Australia
| | - Stephen R Conrad
- National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW, Australia
| | - Christian J Sanders
- National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW, Australia
| | - Samantha Hessey
- Coffs Harbour City Council, Coffs Harbour, NSW, 2450, Australia
| | - Isaac R Santos
- National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW, Australia; Department of Marine Sciences, University of Gothenburg, Gothenburg, Sweden
| |
Collapse
|
38
|
Pu C, Chen JS, Wang HD, Virk AL, Zhao X, Zhang HL. Greenhouse gas emissions from the wheat-maize cropping system under different tillage and crop residue management practices in the North China Plain. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 819:153089. [PMID: 35038532 DOI: 10.1016/j.scitotenv.2022.153089] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 01/09/2022] [Accepted: 01/09/2022] [Indexed: 06/14/2023]
Abstract
With increasing attention being placed on mitigating global warming and achieving agricultural sustainable intensification, conservation agriculture practices have gradually been implemented in the North China Plain (NCP). However, there are still knowledge gaps on the effects of conservation practices on greenhouse gas (GHG) emissions in this area. In this study, a four-year field experiment was conducted from 2014 to 2018 to assess the effects of tillage and crop residue management practices on the emissions of nitrous oxide (N2O) and methane (CH4). Subsequently, crop yields, area-scaled and yield-scaled total non-carbon dioxide (CO2) GHG emissions were assessed. Our research found that no-till (NT) decreased N2O emissions by 22.6% compared with conventional tillage (CT) in winter wheat (Triticum aestivum L.) seasons, but there was no difference between tillage practices in summer maize (Zea mays L.) seasons. Crop residue retention practice (+R) increased N2O emissions by 28.1% and 26.7% compared with residue removal practice (-R) in winter wheat and summer maize seasons, respectively. The NT soils took up more CH4 compared with the CT soils in summer maize seasons. Area-scaled total non-CO2 GHG emissions showed trends similar to those of N2O emission. Since crop residue retention improved the maize yield compared with the residue removal treatments, yield-scaled total non-CO2 GHGs emission did not differ between residue management practices in summer maize seasons. Our four-year field measurements indicated that no-till practice could be more useful as an option to mitigate non-CO2 GHG emissions in the wheat - maize cropping system.
Collapse
Affiliation(s)
- Chao Pu
- College of Agronomy and Biotechnology, China Agricultural University, Key Laboratory of Farming System, Ministry of Agriculture and Rural Affairs of China, Beijing 100193, PR China; College of Agriculture and Ecological Engineering, Hexi University, Zhangye 734000, PR China
| | - Jin-Sai Chen
- College of Agronomy and Biotechnology, China Agricultural University, Key Laboratory of Farming System, Ministry of Agriculture and Rural Affairs of China, Beijing 100193, PR China
| | - Hao-Di Wang
- College of Agronomy and Biotechnology, China Agricultural University, Key Laboratory of Farming System, Ministry of Agriculture and Rural Affairs of China, Beijing 100193, PR China
| | - Ahmad Latif Virk
- College of Agronomy and Biotechnology, China Agricultural University, Key Laboratory of Farming System, Ministry of Agriculture and Rural Affairs of China, Beijing 100193, PR China
| | - Xin Zhao
- College of Agronomy and Biotechnology, China Agricultural University, Key Laboratory of Farming System, Ministry of Agriculture and Rural Affairs of China, Beijing 100193, PR China.
| | - Hai-Lin Zhang
- College of Agronomy and Biotechnology, China Agricultural University, Key Laboratory of Farming System, Ministry of Agriculture and Rural Affairs of China, Beijing 100193, PR China
| |
Collapse
|
39
|
Abstract
Climate change is the most serious challenge facing humanity. Microbes produce and consume three major greenhouse gases-carbon dioxide, methane, and nitrous oxide-and some microbes cause human, animal, and plant diseases that can be exacerbated by climate change. Hence, microbial research is needed to help ameliorate the warming trajectory and cascading effects resulting from heat, drought, and severe storms. We present a brief summary of what is known about microbial responses to climate change in three major ecosystems: terrestrial, ocean, and urban. We also offer suggestions for new research directions to reduce microbial greenhouse gases and mitigate the pathogenic impacts of microbes. These include performing more controlled studies on the climate impact on microbial processes, system interdependencies, and responses to human interventions, using microbes and their carbon and nitrogen transformations for useful stable products, improving microbial process data for climate models, and taking the One Health approach to study microbes and climate change.
Collapse
|
40
|
Zhang Y, Qin Z, Li T, Zhu X. Carbon dioxide uptake overrides methane emission at the air-water interface of algae-shellfish mariculture ponds: Evidence from eddy covariance observations. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 815:152867. [PMID: 34995581 DOI: 10.1016/j.scitotenv.2021.152867] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 12/26/2021] [Accepted: 12/29/2021] [Indexed: 06/14/2023]
Abstract
Mariculture ponds are widely distributed along the coastal regions and have been increasingly recognized as biogeochemical hotspots of air-water greenhouse gas (GHG) fluxes, but their source/sink dynamics and climate benefits have not been well understood. Due to strong temporal variations of GHG fluxes over mariculture ponds, previous studies based on short-term or discrete flux measurements have large uncertainty in assessing GHG budgets and their radiative effects. In this study, we examined the temporal variations of air-water GHG fluxes, net CO2 exchange (NEE) and net CH4 exchange (NME), and their environmental controls, based on one-year (2020) continuous eddy covariance (EC) measurements over algae-shellfish mariculture ponds (razor clam) in a subtropical estuary of Southeast China. The results showed that (a) annually the ponds acted as a strong CO2 sink of -227.7 g CO2-C m-2 and a weak CH4 source of 1.44 g CH4-C m-2, and thus the NME-induced warming effect offset 25.9% (12.1%) of the NEE-induced cooling effect at a 20-year (100-year) time horizon using the metric of sustained-flux global warming potential; (b) two GHG fluxes showed different diurnal and seasonal variations but both had stronger source/sink capacity in summer and more fluctuating fluxes in winter; (c) temporal variations of NEE and NME tended to be more regulated by photosynthetically active radiation and tidal salinity, respectively, but both of them were affected by water temperature and area proportion of algae ponds within the EC footprint. This is the first study to disentangle temporal variations of air-water GHG fluxes over mariculture ponds based on simultaneous EC measurements of CO2 and CH4 fluxes. This study highlights the climate benefits of algae-shellfish mariculture ponds as biogeochemical hotspots by exerting a net radiative cooling effect dominated by the CO2 sink.
Collapse
Affiliation(s)
- Yiping Zhang
- State Key Laboratory of Marine Environment Science, Key Laboratory of the Coastal and Wetland Ecosystems (Ministry of Education), Coastal and Ocean Management Institute, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, China
| | - Zhangcai Qin
- School of Atmospheric Sciences, Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-sen University, Zhuhai, Guangdong 519000, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, Guangdong 519000, China
| | - Tingting Li
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, Guangdong 519000, China; LAPC, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - Xudong Zhu
- State Key Laboratory of Marine Environment Science, Key Laboratory of the Coastal and Wetland Ecosystems (Ministry of Education), Coastal and Ocean Management Institute, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, Guangdong 519000, China.
| |
Collapse
|
41
|
Fouse JA, Eagle MJ, Kroeger KD, Smith TP. Estimating the aboveground biomass and carbon stocks of tall shrubs in a pre‐restoration degraded salt marsh. Restor Ecol 2022. [DOI: 10.1111/rec.13684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Jacqualyn A. Fouse
- Friends of Herring River P.O. Box 1485 Wellfleet Massachusetts 02667 United States
| | - Meagan J. Eagle
- U.S. Geological Survey Woods Hole Coastal and Marine Science Center 384 Woods Hole Road Woods Hole Massachusetts 02543 United States
| | - Kevin D. Kroeger
- U.S. Geological Survey Woods Hole Coastal and Marine Science Center 384 Woods Hole Road Woods Hole Massachusetts 02543 United States
| | - Timothy P. Smith
- U.S. National Park Service Cape Cod National Seashore 99 Marconi Site Road Wellfleet Massachusetts 02667 United States
| |
Collapse
|
42
|
|
43
|
Cory AB, Chanton JP, Spencer RGM, Ogles OC, Rich VI, McCalley CK, Wilson RM. Quantifying the inhibitory impact of soluble phenolics on anaerobic carbon mineralization in a thawing permafrost peatland. PLoS One 2022; 17:e0252743. [PMID: 35108267 PMCID: PMC8809605 DOI: 10.1371/journal.pone.0252743] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 01/01/2022] [Indexed: 11/24/2022] Open
Abstract
The mechanisms controlling the extraordinarily slow carbon (C) mineralization rates characteristic of Sphagnum-rich peatlands (“bogs”) are not fully understood, despite decades of research on this topic. Soluble phenolic compounds have been invoked as potentially significant contributors to bog peat recalcitrance due to their affinity to slow microbial metabolism and cell growth. Despite this potentially significant role, the effects of soluble phenolic compounds on bog peat C mineralization remain unclear. We analyzed this effect by manipulating the concentration of free soluble phenolics in anaerobic bog and fen peat incubations using water-soluble polyvinylpyrrolidone (“PVP”), a compound that binds with and inactivates phenolics, preventing phenolic-enzyme interactions. CO2 and CH4 production rates (end-products of anaerobic C mineralization) generally correlated positively with PVP concentration following Michaelis-Menten (M.M.) saturation functions. Using M.M. parameters, we estimated that the extent to which phenolics inhibit anaerobic CO2 production was significantly higher in the bog—62 ± 16%—than the fen—14 ± 4%. This difference was found to be more substantial with regards to methane production—wherein phenolic inhibition for the bog was estimated at 54 ± 19%, while the fen demonstrated no apparent inhibition. Consistent with this habitat difference, we observed significantly higher soluble phenolic content in bog vs. fen pore-water. Together, these findings suggest that soluble phenolics could contribute to bogs’ extraordinary recalcitrance and high (relative to other peatland habitats) CO2:CH4 production ratios.
Collapse
Affiliation(s)
- Alexandra B. Cory
- Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, FL, United States of America
- * E-mail:
| | - Jeffrey P. Chanton
- Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, FL, United States of America
| | - Robert G. M. Spencer
- Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, FL, United States of America
| | - Olivia C. Ogles
- Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, FL, United States of America
| | - Virginia I. Rich
- Department of Microbiology, The Ohio State University, Columbus, OH, United States of America
| | - Carmody K. McCalley
- Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, Rochester, NY, United States of America
| | | | | | - Rachel M. Wilson
- Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, FL, United States of America
| |
Collapse
|
44
|
Compositional stability of peat in ecosystem-scale warming mesocosms. PLoS One 2022; 17:e0263994. [PMID: 35235578 PMCID: PMC8890625 DOI: 10.1371/journal.pone.0263994] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 02/01/2022] [Indexed: 11/26/2022] Open
Abstract
Peatlands historically have acted as a C sink because C-fixation rates exceeded the rate of heterotrophic decomposition. Under future warmer conditions predicted for higher latitudes, however, that balance may shift towards higher rates of heterotrophic respiration leading to the release of previously stored C as CO2 and CH4. The Spruce and Peatlands Response Under Changing Environments (SPRUCE) experiment is designed to test the response of peatlands to climate forcing using a series of warmed enclosures in combination with peat below-ground heating from 0 to +9°C above ambient conditions. This experimental design allowed a test of chemical changes occurring within peatland soils following five years of warming. We analyzed samples in the uppermost 2m of peat using Fourier Transform Infrared Spectroscopy (FT-IR) to quantify the relative abundance of carbohydrate and aromatic compounds in the peat. The peat soils were subjected to deep peat heating (DPH) beginning in June of 2014 followed by whole ecosystem warming (WEW) in August of 2015. We found that the relative amounts of labile and recalcitrant chemical compound groups across the full peat depth interval did not significantly change after five years of exposure to warming. This appears the case even though previous studies have shown that net C losses and loss of bulk peat mass to be instability over that time period. Results suggest that the current store of carbon in peatlands are largely compositionally stable leading to no changes the in the ratio of chemical moieties on the initial four-year timescale of this experiment.
Collapse
|
45
|
Mander Ü, Krasnova A, Schindler T, Megonigal JP, Escuer-Gatius J, Espenberg M, Machacova K, Maddison M, Pärn J, Ranniku R, Pihlatie M, Kasak K, Niinemets Ü, Soosaar K. Long-term dynamics of soil, tree stem and ecosystem methane fluxes in a riparian forest. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 809:151723. [PMID: 34801507 DOI: 10.1016/j.scitotenv.2021.151723] [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: 09/15/2021] [Revised: 10/20/2021] [Accepted: 11/12/2021] [Indexed: 06/13/2023]
Abstract
The carbon (C) budgets of riparian forests are sensitive to climatic variability. Therefore, riparian forests are hot spots of C cycling in landscapes. Only a limited number of studies on continuous measurements of methane (CH4) fluxes from riparian forests is available. Here, we report continuous high-frequency soil and ecosystem (eddy-covariance; EC) measurements of CH4 fluxes with a quantum cascade laser absorption spectrometer for a 2.5-year period and measurements of CH4 fluxes from tree stems using manual chambers for a 1.5 year period from a temperate riparian Alnus incana forest. The results demonstrate that the riparian forest is a minor net annual sink of CH4 consuming 0.24 kg CH4-C ha-1 y-1. Soil water content is the most important determinant of soil, stem, and EC fluxes, followed by soil temperature. There were significant differences in CH4 fluxes between the wet and dry periods. During the wet period, 83% of CH4 was emitted from the tree stems while the ecosystem-level emission was equal to the sum of soil and stem emissions. During the dry period, CH4 was substantially consumed in the soil whereas stem emissions were very low. A significant difference between the EC fluxes and the sum of soil and stem fluxes during the dry period is most likely caused by emission from the canopy whereas at the ecosystem level the forest was a clear CH4 sink. Our results together with past measurements of CH4 fluxes in other riparian forests suggest that temperate riparian forests can be long-term CH4 sinks.
Collapse
Affiliation(s)
- Ülo Mander
- Department of Geography, Institute of Ecology & Earth Sciences, University of Tartu, Vanemuise 46, 51014 Tartu, Estonia; Global Change Research Institute of the Czech Academy of Sciences, Department of Ecosystem Trace Gas Exchange, Belidla 986/4a, 603 00 Brno, Czech Republic.
| | - Alisa Krasnova
- Department of Geography, Institute of Ecology & Earth Sciences, University of Tartu, Vanemuise 46, 51014 Tartu, Estonia; Institute of Forestry and Rural Engineering, Estonian University of Life Sciences, Kreutzwaldi 1, 51006 Tartu, Estonia
| | - Thomas Schindler
- Department of Geography, Institute of Ecology & Earth Sciences, University of Tartu, Vanemuise 46, 51014 Tartu, Estonia; Global Change Research Institute of the Czech Academy of Sciences, Department of Ecosystem Trace Gas Exchange, Belidla 986/4a, 603 00 Brno, Czech Republic
| | - J Patrick Megonigal
- Smithsonian Environmental Institute, 647 Contees Wharf Road Edgewater, MD 21037-0028, USA
| | - Jordi Escuer-Gatius
- Institute of Agricultural & Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 5, 51006 Tartu, Estonia
| | - Mikk Espenberg
- Department of Geography, Institute of Ecology & Earth Sciences, University of Tartu, Vanemuise 46, 51014 Tartu, Estonia
| | - Katerina Machacova
- Department of Geography, Institute of Ecology & Earth Sciences, University of Tartu, Vanemuise 46, 51014 Tartu, Estonia; Global Change Research Institute of the Czech Academy of Sciences, Department of Ecosystem Trace Gas Exchange, Belidla 986/4a, 603 00 Brno, Czech Republic
| | - Martin Maddison
- Department of Geography, Institute of Ecology & Earth Sciences, University of Tartu, Vanemuise 46, 51014 Tartu, Estonia
| | - Jaan Pärn
- Department of Geography, Institute of Ecology & Earth Sciences, University of Tartu, Vanemuise 46, 51014 Tartu, Estonia
| | - Reti Ranniku
- Department of Geography, Institute of Ecology & Earth Sciences, University of Tartu, Vanemuise 46, 51014 Tartu, Estonia
| | - Mari Pihlatie
- Department of Agricultural Sciences, Environmental Soil Sciences, University of Helsinki, Latokartanonkaari 7, 00014 Helsinki, Finland; Institute for Atmospheric and Earth System Research (INAR) / Forest Science, University of Helsinki, Physicum, Kumpula campus, Gustaf Hällströmin katu 2, 00560 Helsinki, Finland; Department of Agricultural Sciences, Viikki Plant Science Centre (ViPS), University of Helsinki, Viikinkaari 2a, 00014 Helsinki, Finland
| | - Kuno Kasak
- Department of Geography, Institute of Ecology & Earth Sciences, University of Tartu, Vanemuise 46, 51014 Tartu, Estonia
| | - Ülo Niinemets
- Institute of Agricultural & Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 5, 51006 Tartu, Estonia
| | - Kaido Soosaar
- Department of Geography, Institute of Ecology & Earth Sciences, University of Tartu, Vanemuise 46, 51014 Tartu, Estonia; Global Change Research Institute of the Czech Academy of Sciences, Department of Ecosystem Trace Gas Exchange, Belidla 986/4a, 603 00 Brno, Czech Republic
| |
Collapse
|
46
|
Yang P, Luo L, Tang KW, Lai DYF, Tong C, Hong Y, Zhang L. Environmental drivers of nitrous oxide emission factor for a coastal reservoir and its catchment areas in southeastern China. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 294:118568. [PMID: 34838712 DOI: 10.1016/j.envpol.2021.118568] [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: 09/14/2021] [Revised: 11/19/2021] [Accepted: 11/20/2021] [Indexed: 06/13/2023]
Abstract
While Asia is projected to be one of the major nitrous oxide (N2O) sources in the coming decades, a more accurate assessment of N2O budget has been hampered by low data resolution and poorly constrained emission factor (EF). Since urbanized coastal reservoirs receive high nitrogen loads from diverse sources across a heterogeneous landscape, the use of a single fixed EF may lead to large errors in N2O assessment. In this study, we conducted high spatial resolution sampling of dissolved N2O, nitrate-nitrogen (NO3--N) and other physico-chemical properties of surface water in Wenwusha Reservoir and other types of water bodies (river, drainage channels, and aquaculture ponds) in its catchment areas in southeastern China between November 2018 and June 2019. The empirically derived EF (calculated as N2O-N:NO3--N) for the reservoir showed considerable spatial variations, with a 10-fold difference ranging from 0.8 × 10-3 to 8.8 × 10-3. The average EF varied significantly among the four types of water bodies in the following descending order: aquaculture ponds > river > drainage channels > reservoir. Across all the water bodies, the mean EF in summer was 1.8-3.5 and 1.7-2.8 fold higher than that in autumn and spring, respectively, owing to the elevated water temperature. Overall, our derived EF deviated considerably from the IPCC default value, which implied that the use of default EF could result in over- or under-estimation of N2O emissions by up to 42%. We developed a multiple regression model that could explain 82% of the variance in EF based on water temperature and the ratio between dissolved organic carbon and nitrate-nitrogen (p < 0.001), which could be used to improve the estimate of EF for assessing N2O emission from coastal reservoirs and other similar environments.
Collapse
Affiliation(s)
- Ping Yang
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, PR China; Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350007, PR China.
| | - Liangjuan Luo
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, PR China; Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350007, PR China
| | - Kam W Tang
- Department of Biosciences, Swansea University, Swansea SA2 8PP, UK
| | - Derrick Y F Lai
- Department of Geography and Resource Management, The Chinese University of Hong Kong, Hong Kong, China
| | - Chuan Tong
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, PR China; Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350007, PR China
| | - Yan Hong
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, PR China
| | - Linhai Zhang
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, PR China; Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350007, PR China
| |
Collapse
|
47
|
Bonetti G, Limpert KE, Brodersen KE, Trevathan-Tackett SM, Carnell PE, Macreadie PI. The combined effect of short-term hydrological and N-fertilization manipulation of wetlands on CO 2, CH 4, and N 2O emissions. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 294:118637. [PMID: 34875268 DOI: 10.1016/j.envpol.2021.118637] [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: 09/27/2021] [Revised: 11/12/2021] [Accepted: 12/03/2021] [Indexed: 06/13/2023]
Abstract
Freshwater wetlands are natural sinks of carbon; yet, wetland conversion for agricultural uses can shift these carbon sinks into large sources of greenhouse gases. We know that the anthropogenic alteration of wetland hydrology and the broad use of N-fertilizers can modify biogeochemical cycling, however, the extent of their combined effect on greenhouse gases exchange still needs further research. Moreover, there has been recent interest in wetlands rehabilitation and preservation by improving natural water flow and by seeking alternative solutions to nutrient inputs. In a microcosm setting, we experimentally exposed soils to three inundation treatments (Inundated, Moist, Drained) and a nutrient treatment by adding high nitrogen load (300 kg ha-1) to simulate physical and chemical disturbances. After, we measured the depth microprofiles of N2O and O2 concentration and CO2 and CH4 emission rates to determine how hydrological alteration and nitrogen input affect carbon and nitrogen cycling processes in inland wetland soils. Compared to the Control soils, N-fertilizer increased CO2 emissions by 40% in Drained conditions and increased CH4 emissions in Inundated soils over 90%. N2O emissions from Moist and Inundated soils enriched with nitrogen increased by 17.4 and 18-fold, respectively. Overall, the combination of physical and chemical disturbances increased the Global Warming Potential (GWP) by 7.5-fold. The first response of hydrological rehabilitation, while typically valuable for CO2 emission reduction, amplified CH4 and N2O emissions when combined with high nitrogen inputs. Therefore, this research highlights the importance of evaluating the potential interactive effects of various disturbances on biogeochemical processes when devising rehabilitation plans to rehabilitate degraded wetlands.
Collapse
Affiliation(s)
- Giuditta Bonetti
- Deakin University, Centre for Integrative Ecology, School of Life and Environmental Sciences, Burwood Campus, Victoria, 3125, Australia.
| | - Katy E Limpert
- Deakin University, Centre for Integrative Ecology, School of Life and Environmental Sciences, Burwood Campus, Victoria, 3125, Australia.
| | - Kasper Elgetti Brodersen
- Marine Biological Section, Department of Biology, University of Copenhagen, 3000, Helsingør, Denmark.
| | - Stacey M Trevathan-Tackett
- Deakin University, Centre for Integrative Ecology, School of Life and Environmental Sciences, Burwood Campus, Victoria, 3125, Australia.
| | - Paul E Carnell
- Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Geelong, Queenscliff Campus, Queenscliff, Victoria, 3225, Australia.
| | - Peter I Macreadie
- Deakin University, Centre for Integrative Ecology, School of Life and Environmental Sciences, Burwood Campus, Victoria, 3125, Australia.
| |
Collapse
|
48
|
Quantification of Ecosystem-Scale Methane Sinks Observed in a Tropical Rainforest in Hainan, China. LAND 2022. [DOI: 10.3390/land11020154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Tropical rainforest ecosystems are important when considering the global methane (CH4) budget and in climate change mitigation. However, there is a lack of direct and year-round observations of ecosystem-scale CH4 fluxes from tropical rainforest ecosystems. In this study, we examined the temporal variations in CH4 flux at the ecosystem scale and its annual budget and environmental controlling factors in a tropical rainforest of Hainan Island, China, using 3 years of continuous eddy covariance measurements from 2016 to 2018. Our results show that CH4 uptake generally occurred in this tropical rainforest, where strong CH4 uptake occurred in the daytime, and a weak CH4 uptake occurred at night with a mean daily CH4 flux of −4.5 nmol m−2 s−1. In this rainforest, the mean annual budget of CH4 for the 3 years was −1260 mg CH4 m−2 year−1. Furthermore, the daily averaged CH4 flux was not distinctly different between the dry season and wet season. Sixty-nine percent of the total variance in the daily CH4 flux could be explained by the artificial neural network (ANN) model, with a combination of air temperature (Tair), latent heat flux (LE), soil volumetric water content (VWC), atmospheric pressure (Pa), and soil temperature at −10 cm (Tsoil), although the linear correlation between the daily CH4 flux and any of these individual variables was relatively low. This indicates that CH4 uptake in tropical rainforests is controlled by multiple environmental factors and that their relationships are nonlinear. Our findings also suggest that tropical rainforests in China acted as a CH4 sink during 2016–2018, helping to counteract global warming.
Collapse
|
49
|
Tang C, Yang F, Antonietti M. Carbon Materials Advancing Microorganisms in Driving Soil Organic Carbon Regulation. RESEARCH (WASHINGTON, D.C.) 2022; 2022:9857374. [PMID: 35098139 PMCID: PMC8777470 DOI: 10.34133/2022/9857374] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 12/10/2021] [Indexed: 12/20/2022]
Abstract
Carbon emission from soil is not only one of the major sources of greenhouse gases but also threatens biological diversity, agricultural productivity, and food security. Regulation and control of the soil carbon pool are political practices in many countries around the globe. Carbon pool management in engineering sense is much bigger and beyond laws and monitoring, as it has to contain proactive elements to restore active carbon. Biogeochemistry teaches us that soil microorganisms are crucial to manage the carbon content effectively. Adding carbon materials to soil is thereby not directly sequestration, as interaction of appropriately designed materials with the soil microbiome can result in both: metabolization and thereby nonsustainable use of the added carbon, or-more favorably-a biological amplification of human efforts and sequestration of extra CO2 by microbial growth. We review here potential approaches to govern soil carbon, with a special focus set on the emerging practice of adding manufactured carbon materials to control soil carbon and its biological dynamics. Notably, research on so-called "biochar" is already relatively mature, while the role of artificial humic substance (A-HS) in microbial carbon sequestration is still in the developing stage. However, it is shown that the preparation and application of A-HS are large biological levers, as they directly interact with the environment and community building of the biological soil system. We believe that A-HS can play a central role in stabilizing carbon pools in soil.
Collapse
Affiliation(s)
- Chunyu Tang
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China
- Joint Laboratory of Northeast Agricultural University and Max Planck Institute of Colloids and Interfaces (NEAU-MPICI), Harbin 150030, China
| | - Fan Yang
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China
- Joint Laboratory of Northeast Agricultural University and Max Planck Institute of Colloids and Interfaces (NEAU-MPICI), Harbin 150030, China
| | - Markus Antonietti
- Max Planck Institute of Colloids and Interfaces Department of Colloid Chemistry, 14476 Potsdam, Germany
| |
Collapse
|
50
|
Sadat-Noori M, Rutlidge H, Andersen MS, Glamore W. Quantifying groundwater carbon dioxide and methane fluxes to an urban freshwater lake using radon measurements. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 797:149184. [PMID: 34346371 DOI: 10.1016/j.scitotenv.2021.149184] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 07/15/2021] [Accepted: 07/17/2021] [Indexed: 06/13/2023]
Abstract
Freshwater lakes can play a significant role in greenhouse gas budgets as they can be sources or sinks of carbon to the atmosphere. However, there is limited information on groundwater discharge being a source of carbon to freshwater lakes. Here, we measure CO2 and CH4 in the largest urban freshwater lake in the metropolitan area of Sydney (Australia) and quantify groundwater discharge rates into the lake using radon (222Rn, a natural groundwater tracer). We also assess the spatial variability of radon, CO2 and CH4 in the lake, in addition to surface water and groundwater nutrient and carbon concentrations. Results revealed that the lake system was a source of CO2 and CH4 to the atmosphere with fluxes of 113 ± 81 and 0.3 ± 0.1 mmol/m2/d, respectively. These calculated CO2 fluxes were larger than commonly observed lake fluxes and the global average flux from lakes. However, CH4 fluxes were lower than the average global value. Based on the radon mass balance model, groundwater discharge to the lake was 16 ± 10 cm/d, which resulted in groundwater-derived CO2 and CH4 fluxes contributing 25 and 13% to the overall greenhouse gas emissions from the lake, respectively. Radon, CO2 and CH4 maps showed similar spatial distribution trends in the lake and a strong relationship between radon, NO3 and NH4 suggested groundwater flow was also a driver of nitrogen into the lake from the western side of the lake, following the general regional groundwater flow. This work provides insights into groundwater and greenhouse gas dynamics in Sydney's largest urban freshwater lake with two implications for carbon budgets: to incorporate urban lakes in global carbon budgets and to account for, the often ignored, groundwater discharge as a source of carbon to lakes.
Collapse
Affiliation(s)
- Mahmood Sadat-Noori
- Water Research Laboratory, School of Civil & Environmental Engineering, UNSW Sydney, NSW 2052, Australia.
| | - Helen Rutlidge
- Water Research Laboratory, School of Civil & Environmental Engineering, UNSW Sydney, NSW 2052, Australia
| | - Martin S Andersen
- Water Research Laboratory, School of Civil & Environmental Engineering, UNSW Sydney, NSW 2052, Australia
| | - William Glamore
- Water Research Laboratory, School of Civil & Environmental Engineering, UNSW Sydney, NSW 2052, Australia
| |
Collapse
|