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Wang Y, Wang Y, Zhou K, Zhang H, Cheng M, Wang B, Yan X. Isolation of a facultative methanotroph Methylocystis iwaonis SD4 from rice rhizosphere and establishment of rapid genetic tools for it. Biotechnol Lett 2024; 46:713-724. [PMID: 38733438 DOI: 10.1007/s10529-024-03495-y] [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: 03/17/2024] [Revised: 04/10/2024] [Accepted: 04/21/2024] [Indexed: 05/13/2024]
Abstract
Methanotrophs of the genus Methylocystis are frequently found in rice paddies. Although more than ten facultative methanotrophs have been reported since 2005, none of these strains was isolated from paddy soil. Here, a facultative methane-oxidizing bacterium, Methylocystis iwaonis SD4, was isolated and characterized from rhizosphere samples of rice plants in Nanjing, China. This strain grew well on methane or methanol but was able to grow slowly using acetate or ethanol. Moreover, strain SD4 showed sustained growth at low concentrations of methane (100 and 500 ppmv). M. iwaonis SD4 could utilize diverse nitrogen sources, including nitrate, urea, ammonium as well as dinitrogen. Strain SD4 possessed genes encoding both the particulate methane monooxygenase and the soluble methane monooxygenase. Simple and rapid genetic manipulation methods were established for this strain, enabling vector transformation and unmarked genetic manipulation. Fast growth rate and efficient genetic tools make M. iwaonis SD4 an ideal model to study facultative methanotrophs, and the ability to grow on low concentration of methane implies its potential in methane removal.
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Affiliation(s)
- Yinghui Wang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, People's Republic of China
| | - Yuying Wang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, People's Republic of China
| | - Keyu Zhou
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, People's Republic of China
| | - Haili Zhang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, People's Republic of China
| | - Minggen Cheng
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, People's Republic of China
| | - Baozhan Wang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, People's Republic of China
| | - Xin Yan
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, People's Republic of China.
- Jiangsu Provincial Key Lab for Solid Organic Waste Utilization, Key Lab of Organic-Based Fertilizers of China, Jiangsu Collaborative Innovation Center for Solid Organic Wastes, Educational Ministry Engineering Center of Resource-Saving Fertilizers, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China.
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2
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Law SJ, Allison SD, Davies AB, Flores-Moreno H, Wijas BJ, Yatsko AR, Zhou Y, Zanne AE, Eggleton P. The challenge of estimating global termite methane emissions. GLOBAL CHANGE BIOLOGY 2024; 30:e17390. [PMID: 38899583 DOI: 10.1111/gcb.17390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 05/30/2024] [Accepted: 06/04/2024] [Indexed: 06/21/2024]
Abstract
Methane is a powerful greenhouse gas, more potent than carbon dioxide, and emitted from a variety of natural sources including wetlands, permafrost, mammalian guts and termites. As increases in global temperatures continue to break records, quantifying the magnitudes of key methane sources has never been more pertinent. Over the last 40 years, the contribution of termites to the global methane budget has been subject to much debate. The most recent estimates of termite emissions range between 9 and 15 Tg CH4 year-1, approximately 4% of emissions from natural sources (excluding wetlands). However, we argue that the current approach for estimating termite contributions to the global methane budget is flawed. Key parameters, namely termite methane emissions from soil, deadwood, living tree stems, epigeal mounds and arboreal nests, are largely ignored in global estimates. This omission occurs because data are lacking and research objectives, crucially, neglect variation in termite ecology. Furthermore, inconsistencies in data collection methods prohibit the pooling of data required to compute global estimates. Here, we summarise the advances made over the last 40 years and illustrate how different aspects of termite ecology can influence the termite contribution to global methane emissions. Additionally, we highlight technological advances that may help researchers investigate termite methane emissions on a larger scale. Finally, we consider dynamic feedback mechanisms of climate warming and land-use change on termite methane emissions. We conclude that ultimately the global contribution of termites to atmospheric methane remains unknown and thus present an alternative framework for estimating their emissions. To significantly improve estimates, we outline outstanding questions to guide future research efforts.
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Affiliation(s)
- Stephanie J Law
- Life Sciences Department, The Natural History Museum, London, UK
| | - Steven D Allison
- Department of Ecology and Evolutionary Biology, University of California, Irvine, California, USA
- Department of Earth System Science, University of California, Irvine, California, USA
| | - Andrew B Davies
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, Massachusetts, USA
| | | | | | - Abbey R Yatsko
- Department of Biology, University of Miami, Miami, Florida, USA
| | - Yong Zhou
- Department of Wildland Resources, Utah State University, Logan, Utah, USA
- Ecology Center, Utah State University, Logan, Utah, USA
| | - Amy E Zanne
- Department of Biology, University of Miami, Miami, Florida, USA
- Cary Institute of Ecosystem Studies, Millbrook, New York, USA
| | - Paul Eggleton
- Life Sciences Department, The Natural History Museum, London, UK
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3
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Ren Z, Li Y, Yin J, Zhao Z, Hu N, Zhao M, Wang Y, Wang L, Wu L. Regulation of nitrite-dependent anaerobic methane oxidation bacteria by available phosphorus and microbial communities in lake sediments of cold and arid regions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 926:172065. [PMID: 38556008 DOI: 10.1016/j.scitotenv.2024.172065] [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: 11/21/2023] [Revised: 03/11/2024] [Accepted: 03/26/2024] [Indexed: 04/02/2024]
Abstract
As global anthropogenic nitrogen inputs continue to rise, nitrite-dependent anaerobic methane oxidation (N-DAMO) plays an increasingly significant role in CH4 consumption in lake sediments. However, there is a dearth of knowledge regarding the effects of anthropogenic activities on N-DAMO bacteria in lakes in the cold and arid regions. Sediment samples were collected from five sampling areas in Lake Ulansuhai at varying depth ranges (0-20, 20-40, and 40-60 cm). The ecological characterization and niche differentiation of N-DAMO bacteria were investigated using bioinformatics and molecular biology techniques. Quantitative PCR confirmed the presence of N-DAMO bacteria in Lake Ulansuhai sediments, with 16S rRNA gene abundances ranging from 1.72 × 104 to 5.75 × 105 copies·g-1 dry sediment. The highest abundance was observed at the farmland drainage outlet with high available phosphorus (AP). Anthropogenic disturbances led to a significant increase in the abundance of N-DAMO bacteria, though their diversity remained unaffected. The heterogeneous community of N-DAMO bacteria was affected by interactions among various environmental characteristics, with AP and oxidation-reduction potential identified as the key drivers in this study. The Mantel test indicated that the N-DAMO bacterial abundance was more readily influenced by the presence of the denitrification genes (nirS and nirK). Network analysis revealed that the community structure of N-DAMO bacteria generated numerous links (especially positive links) with microbial taxa involved in carbon and nitrogen cycles, such as methanogens and nitrifying bacteria. In summary, N-DAMO bacteria exhibited sensitivity to both environmental and microbial factors under various human disturbances. This study provides valuable insights into the distribution patterns of N-DAMO bacteria and their roles in nitrogen and carbon cycling within lake ecosystems.
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Affiliation(s)
- Zixuan Ren
- School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Yingnan Li
- School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Jiahui Yin
- School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Ziwen Zhao
- School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Nan Hu
- School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Manping Zhao
- School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Yongman Wang
- School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Lixin Wang
- School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Linhui Wu
- School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China; Inner Mongolia Key Laboratory of Environmental Pollution Prevention and Waste Resource Recycle, Hohhot 010021, China.
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4
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Safi E, Arnold T, Rennick C. Fractionation of Methane Isotopologues during Preparation for Analysis from Ambient Air. Anal Chem 2024; 96:6139-6147. [PMID: 38518762 PMCID: PMC11044101 DOI: 10.1021/acs.analchem.3c04891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 03/01/2024] [Accepted: 03/04/2024] [Indexed: 03/24/2024]
Abstract
Preconcentration of methane (CH4) from air is a critical sampling step in the measurement of singly and doubly substituted isotopologue ratios. We demonstrate the potential for isotope fractionation during preconcentration onto and elution from the common trapping material HayeSep-D and investigate its significance in laser spectroscopy measurements. By altering the trapping temperature for adsorption, the flow direction of CH4 through the trap and the time at which CH4 is eluted during a desorption temperature ramp, we explain the mechanisms behind fractionation affecting δ13C(CH4) and δ2H(CH4). The results highlight that carbon isotope fractionation is driven by advection and diffusion, while hydrogen isotope fractionation is driven by the interaction of CH4 with the adsorbing material (tending to smaller isotopic effects at higher temperatures). We have compared the difference between the measured isotope ratio of sample gases (compressed whole air and a synthetic mixture of CH4 at ambient amount fraction in an N2 matrix) and their known isotopic composition. An open-system Rayleigh model is used to quantify the magnitude of isotopic fractionation affecting measured δ13C(CH4) and δ2H(CH4), which can be used to calculate the possible magnitude of isotopic fractionation given the recovery percentage. These results provide a quantitative understanding of isotopic fractionation during the sample preparation of CH4 from ambient air. The results also provide valuable insights applicable to other cryogenic preconcentration systems, such as those for measurements that probe the distribution of rarer isotopologues.
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Affiliation(s)
- Emmal Safi
- National
Physical Laboratory, Hampton Road, Teddington TW11 0LW, U.K.
| | - Tim Arnold
- National
Physical Laboratory, Hampton Road, Teddington TW11 0LW, U.K.
- School of
GeoSciences, University of Edinburgh, Edinburgh EH8 9XP, U.K.
| | - Chris Rennick
- National
Physical Laboratory, Hampton Road, Teddington TW11 0LW, U.K.
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5
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Bai Y, Wang Y, Shen L, Shang B, Ji Y, Ren B, Yang W, Yang Y, Ma Z, Feng Z. Equal importance of humic acids and nitrate in driving anaerobic oxidation of methane in paddy soils. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169311. [PMID: 38103608 DOI: 10.1016/j.scitotenv.2023.169311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 12/08/2023] [Accepted: 12/10/2023] [Indexed: 12/19/2023]
Abstract
Methane (CH4) is both generated and consumed in paddy soils, where anaerobic oxidation of methane (AOM) serves as a crucial process for mitigating CH4 emissions. Although the participation of humic acids (HA) and nitrate in AOM has been recognized, their relative roles and significance in paddy soils remain insufficiently investigated. In this study, we explored the potential activity of AOM driven by HA and nitrate, as well as the composition of archaeal communities in paddy soils across different rice growth periods and fertilization treatments. AOM activity ranged from 0.81 to 1.33 and 1.26 to 2.38 nmol of 13CO2 g-1 (dry soil) day-1 with HA and nitrate, respectively. No significant differences (p < 0.05) were observed between the AOM activity driven by HA and nitrate across the three fertilization treatments. According to AOM activity, the annual consumption of CH4 was estimated at approximately 0.49 ± 0.06 and 0.83 ± 0.19 Tg for AOM processes driven by HA and nitrate in Chinese paddy soils. Nitrate-driven AOM activity exhibited a positive (p < 0.05) correlation with the abundance of the ANME-2d mcrA gene but a negative (p < 0.05) correlation with the content of dissolved organic carbon. Intriguingly, HA-driven AOM activity was only correlated positively with the nitrate-driven AOM activity. Soil water content, soil organic carbon, nitrate and nitrite contents were significantly correlated with the relative abundance of methanogenic and methanotrophic archaea. These results identified the potential importance of HA and nitrate in driving AOM processes within paddy soils, providing a comprehensive understanding of the complex microbial processes regulating greenhouse gas emissions from paddy soils.
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Affiliation(s)
- Yanan Bai
- Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - Yanping Wang
- Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - Lidong Shen
- Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China.
| | - Bo Shang
- Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - Yang Ji
- Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - Bingjie Ren
- Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - Wangting Yang
- Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - Yuling Yang
- Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - Zhiguo Ma
- Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - Zhaozhong Feng
- Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China
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6
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Kohl L, Tenhovirta SAM, Koskinen M, Putkinen A, Haikarainen I, Polvinen T, Galeotti L, Mammarella I, Siljanen HMP, Robson TM, Adamczyk B, Pihlatie M. Radiation and temperature drive diurnal variation of aerobic methane emissions from Scots pine canopy. Proc Natl Acad Sci U S A 2023; 120:e2308516120. [PMID: 38127980 PMCID: PMC10756279 DOI: 10.1073/pnas.2308516120] [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: 06/21/2023] [Accepted: 10/29/2023] [Indexed: 12/23/2023] Open
Abstract
Methane emissions from plant foliage may play an important role in the global methane cycle, but their size and the underlying source processes remain poorly understood. Here, we quantify methane fluxes from the shoots of Scots pine trees, a dominant tree species in boreal forests, to identify source processes and environmental drivers, and we evaluate whether these fluxes can be constrained at the ecosystem-level by eddy covariance flux measurements. We show that shoot-level measurements conducted in forest, garden, or greenhouse settings; on mature trees and saplings; manually and with an automated CO2-, temperature-, and water-controlled chamber system; and with multiple methane analyzers all resulted in comparable daytime fluxes (0.144 ± 0.019 to 0.375 ± 0.074 nmol CH4 g-1 foliar d.w. h-1). We further find that these emissions exhibit a pronounced diurnal cycle that closely follows photosynthetically active radiation and is further modulated by temperature. These diurnal patterns indicate that methane production is associated with diurnal cycle of sunlight, indicating that this production is either a byproduct of photosynthesis-associated biochemical reactions (e.g., the methionine cycle) or produced through nonenzymatic photochemical reactions in plant biomass. Moreover, we identified a light-dependent component in stand-level methane fluxes, which showed order-of-magnitude agreement with shoot-level measurements (0.968 ± 0.031 nmol CH4 g-1 h-1) and which provides an upper limit for shoot methane emissions.
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Affiliation(s)
- Lukas Kohl
- Department of Agricultural Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki00790, Finland
- Institute for Atmosphere and Earth System Research/Forest Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki00790, Finland
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio70600, Finland
| | - Salla A. M. Tenhovirta
- Department of Agricultural Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki00790, Finland
- Institute for Atmosphere and Earth System Research/Forest Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki00790, Finland
| | - Markku Koskinen
- Department of Agricultural Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki00790, Finland
- Institute for Atmosphere and Earth System Research/Forest Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki00790, Finland
| | - Anuliina Putkinen
- Department of Agricultural Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki00790, Finland
- Institute for Atmosphere and Earth System Research/Forest Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki00790, Finland
- Department of Microbiology, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki00790, Finland
| | - Iikka Haikarainen
- Department of Agricultural Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki00790, Finland
- Institute for Atmosphere and Earth System Research/Forest Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki00790, Finland
| | - Tatu Polvinen
- Department of Agricultural Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki00790, Finland
- Institute for Atmosphere and Earth System Research/Forest Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki00790, Finland
| | - Luca Galeotti
- Department of Agricultural Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki00790, Finland
- Institute for Atmosphere and Earth System Research/Forest Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki00790, Finland
| | - Ivan Mammarella
- Institute for Atmosphere and Earth System Research/Physics, Faculty of Science, University of Helsinki, Helsinki00560, Finland
| | - Henri M. P. Siljanen
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio70600, Finland
- Archaea Biology and Ecogenomics Unit, Department of Functional and Evolutionary Ecology, University of Vienna, Vienna1030, Austria
| | - Thomas Matthew Robson
- National School of Forestry, University of Cumbria, AmblesideLA22 9BB, United Kingdom
- Organismal and Evolutionary Biology (OEB), Faculty of Biological and Environmental Science, University of Helsinki, Helsinki00790, Finland
| | - Bartosz Adamczyk
- Natural Resources Institute Finland (Luke), Helsinki00790, Finland
| | - Mari Pihlatie
- Department of Agricultural Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki00790, Finland
- Institute for Atmosphere and Earth System Research/Forest Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki00790, Finland
- Viikki Plant Science Center, University of Helsinki, Helsinki00790, Finland
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7
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Ito A. Global termite methane emissions have been affected by climate and land-use changes. Sci Rep 2023; 13:17195. [PMID: 37821639 PMCID: PMC10567709 DOI: 10.1038/s41598-023-44529-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 10/09/2023] [Indexed: 10/13/2023] Open
Abstract
Termites with symbiotic methanogens are a known source of atmospheric methane (CH4), but large uncertainties remain regarding the flux magnitude. This study estimated global termite CH4 emissions using a framework similar to previous studies but with contemporary datasets and a biogeochemical model. The global termite emission in 2020 was estimated as 14.8 ± 6.7 Tg CH4 year-1, mainly from tropical and subtropical ecosystems, indicating a major natural source from upland regions. Uncertainties associated with estimation methods were assessed. The emission during the historical period 1901-2021 was estimated to have increased gradually (+ 0.7 Tg CH4 year-1) as a result of combined influences of elevated CO2 (via vegetation productivity), climatic warming, and land-use change. Future projections using climate and land-use scenarios (shared socioeconomic pathways [ssp] 126 and 585) also showed increasing trends (+ 0.5 to 5.9 Tg CH4 year-1 by 2100). These results suggest the importance of termite emissions in the global CH4 budget and, thus, in climatic prediction and mitigation.
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Affiliation(s)
- Akihiko Ito
- The University of Tokyo, Tokyo, Japan.
- National Institute for Environmental Studies, Tsukuba, Japan.
- Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan.
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8
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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.
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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
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9
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Dang Q, Zhao X, Li Y, Xi B. Revisiting the biological pathway for methanogenesis in landfill from metagenomic perspective-A case study of county-level sanitary landfill of domestic waste in North China plain. ENVIRONMENTAL RESEARCH 2023; 222:115185. [PMID: 36586711 DOI: 10.1016/j.envres.2022.115185] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 12/15/2022] [Accepted: 12/27/2022] [Indexed: 06/17/2023]
Abstract
Landfill is the third highest contributor to anthropogenic methane (CH4) emissions, produced primarily by the anaerobic decomposition of organic matter by microbes. However, how various microbial metabolic processes contribute to CH4 production in domestic waste landfill remains elusive. We addressed this problem by investigating the methanogenic communities, methanogenic functional genes, KEGG modules and KEGG pathways in a county-level MSW sanitary landfill in North China Plain, China. Results showed that Methanomicrobiales, Methanobacteriales, Methanosarcinales, Micrococcales, Corynebacteriales and Bacillales were the dominant methanogens. M00357, M00346, M00567 and M00563 were the four major methane metabolic modules. The most abundant genes were ACSS, ackA and fwd with the relative abundance of 19.26-54.54%, 6.14-25.78% and 6.76-16.51%, respectively. The two essential genes of methanogenesis were detected with the relative abundance of 2.66-9.58% (mtr) and 1.63-9.14% (mcr). These findings indicated that acetotrophic and hydrogenotrophic methanogenesis were the major pathways. Methanomicrobiales, Methanosarcinales and Clostridiales were the key microbes to these pathways identified by co-occurrence network. Analysis of relative contribution of species to function further showed that Micrococcales, Corynebacteriales and Bacillales were special contributors to acetotrophic methanogenesis pathway. Redundancy analysis revealed that above functional genes and microbes were mainly controlled by NH4+ and pH. Our results can help to provide develop the fine management strategies for methane utilization and emission reduction in landfill.
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Affiliation(s)
- Qiuling Dang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; State Environmental Protection Key Laboratory of Hazardous Waste Identification and Risk Control, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Xinyu Zhao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; State Environmental Protection Key Laboratory of Hazardous Waste Identification and Risk Control, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Yanping Li
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; State Environmental Protection Key Laboratory of Hazardous Waste Identification and Risk Control, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Beidou Xi
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
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10
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Bansal S, Post van der Burg M, Fern RR, Jones JW, Lo R, McKenna OP, Tangen BA, Zhang Z, Gleason RA. Large increases in methane emissions expected from North America's largest wetland complex. SCIENCE ADVANCES 2023; 9:eade1112. [PMID: 36857447 PMCID: PMC9977182 DOI: 10.1126/sciadv.ade1112] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
Natural methane (CH4) emissions from aquatic ecosystems may rise because of human-induced climate warming, although the magnitude of increase is highly uncertain. Using an exceptionally large CH4 flux dataset (~19,000 chamber measurements) and remotely sensed information, we modeled plot- and landscape-scale wetland CH4 emissions from the Prairie Pothole Region (PPR), North America's largest wetland complex. Plot-scale CH4 emissions were driven by hydrology, temperature, vegetation, and wetland size. Historically, landscape-scale PPR wetland CH4 emissions were largely dependent on total wetland extent. However, regardless of future wetland extent, PPR CH4 emissions are predicted to increase by two- or threefold by 2100 under moderate or severe warming scenarios, respectively. Our findings suggest that international efforts to decrease atmospheric CH4 concentrations should jointly account for anthropogenic and natural emissions to maintain climate mitigation targets to the end of the century.
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Affiliation(s)
- Sheel Bansal
- U.S. Geological Survey, Northern Prairie Wildlife Research Center, Jamestown, ND, USA
| | - Max Post van der Burg
- U.S. Geological Survey, Northern Prairie Wildlife Research Center, Jamestown, ND, USA
| | - Rachel R. Fern
- U.S. Geological Survey, Northern Prairie Wildlife Research Center, Jamestown, ND, USA
- Texas Parks and Wildlife Department, San Marcos, TX, USA
| | - John W. Jones
- U.S. Geological Survey, Hydrologic Remote Sensing Branch, Kearneysville, WV, USA
| | - Rachel Lo
- U.S. Geological Survey, Northern Prairie Wildlife Research Center, Jamestown, ND, USA
| | - Owen P. McKenna
- U.S. Geological Survey, Northern Prairie Wildlife Research Center, Jamestown, ND, USA
| | - Brian A. Tangen
- U.S. Geological Survey, Northern Prairie Wildlife Research Center, Jamestown, ND, USA
| | - Zhen Zhang
- Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, USA
| | - Robert A. Gleason
- U.S. Geological Survey, Northern Prairie Wildlife Research Center, Jamestown, ND, USA
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11
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Koo CW, Hershewe JM, Jewett MC, Rosenzweig AC. Cell-Free Protein Synthesis of Particulate Methane Monooxygenase into Nanodiscs. ACS Synth Biol 2022; 11:4009-4017. [PMID: 36417751 PMCID: PMC9910172 DOI: 10.1021/acssynbio.2c00366] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Particulate methane monooxygenase (pMMO) is a multi-subunit membrane metalloenzyme used by methanotrophic bacteria to convert methane to methanol. A major hurdle to studying pMMO is the lack of a recombinant expression system, precluding investigation of individual residues by mutagenesis and hampering a complete understanding of its mechanism. Here, we developed an Escherichia coli lysate-based cell-free protein synthesis (CFPS) system that can be used to express pMMO in vitro in the presence of nanodiscs. We used a SUMO fusion construct to generate the native PmoB subunit and showed that the SUMO protease (Ulp1) cleaves the protein in the reaction mixture. Using an affinity tag to isolate the complete pMMO complex, we demonstrated that the complex forms without the need for exogenous translocon machinery or chaperones, confirmed by negative stain electron microscopy. This work demonstrates the potential for using CFPS to express multi-subunit membrane-bound metalloenzymes directly into lipid bilayers.
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Affiliation(s)
- Christopher W. Koo
- Department of Molecular Biosciences and of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Jasmine M. Hershewe
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Michael C. Jewett
- Department of Chemical and Biological Engineering and Center for Synthetic Biology, Northwestern University, Evanston, Illinois 60208, United States
| | - Amy C. Rosenzweig
- Department of Molecular Biosciences and of Chemistry and Center for Synthetic Biology, Northwestern University, Evanston, Illinois 60208, United States
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12
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Abstract
China intends to significantly reduce its methane emissions in the 2020s. A better understanding of methane emissions at regional and national levels provides valuable inputs to the formulation of the action plan. Our observation-based analysis reveals complex and even unexpected linkages between recent changes in China’s methane emissions and related policy drivers: China’s energy policy that prioritizes the phase out of small coal mines leads to region-varying responses in coal mining methane emissions, while agricultural and environmental policies aimed at improving crop production and air quality may have contributed to increased methane emissions from rice cultivation. These findings highlight the importance of integrated considerations in designing methane policy to achieve energy, food, health, and climate targets. China is set to actively reduce its methane emissions in the coming decade. A comprehensive evaluation of the current situation can provide a reference point for tracking the country’s future progress. Here, using satellite and surface observations, we quantify China’s methane emissions during 2010–2017. Including newly available data from a surface network across China greatly improves our ability to constrain emissions at subnational and sectoral levels. Our results show that recent changes in China’s methane emissions are linked to energy, agricultural, and environmental policies. We find contrasting methane emission trends in different regions attributed to coal mining, reflecting region-dependent responses to China’s energy policy of closing small coal mines (decreases in Southwest) and consolidating large coal mines (increases in North). Coordinated production of coalbed methane and coal in southern Shanxi effectively decreases methane emissions, despite increased coal production there. We also detect unexpected increases from rice cultivation over East and Central China, which is contributed by enhanced rates of crop-residue application, a factor not accounted for in current inventories. Our work identifies policy drivers of recent changes in China’s methane emissions, providing input to formulating methane policy toward its climate goal.
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13
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Metya A, Datye A, Chakraborty S, Tiwari YK, Patra PK, Murkute C. Methane sources from waste and natural gas sectors detected in Pune, India, by concentration and isotopic analysis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 842:156721. [PMID: 35716737 DOI: 10.1016/j.scitotenv.2022.156721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 05/09/2022] [Accepted: 06/11/2022] [Indexed: 06/15/2023]
Abstract
Methane (CH4) is a potent greenhouse gas and also plays a significant role in tropospheric chemistry. High-frequency (sub-hourly) measurements of CH4 and carbon isotopic ratio (δ13CH4) have been conducted at Pune (18.53°N, 73.80°E), an urban environment in India, during 2018-2020. High CH4 concentrations were observed, with a mean of 2100 ± 196 ppb (1844-2749 ppb), relative to marine background concentrations. The δ13CH4 varied between -45.11 and -50.03 ‰ for the entire study period with an average of -47.41 ± 0.94 ‰. The diurnal variability of CH4 typically showed maximum values in the morning (08:00-09:00 local time) and minimum in the afternoon (15:00 local time). The deepest diurnal amplitude of ~500 ppb was observed during winter (December-February), which was reduced to less than half, ~200 ppb, during the summer (March-May). CH4 concentration at Pune showed a strong seasonality (470 ppb), much higher than that at Mauna Loa, Hawaii. On the other hand, δ13CH4 records did not show distinct seasonality at Pune. The δ13CH4 values revealed that the significant sources of CH4 in Pune were from the waste sector (enhanced during the monsoon season; signature of depleted δ13CH4), followed by the natural gas sector with a signature of enriched δ13CH4. Our analysis of Covid-19 lockdown (April to May 2020) effect on the CH4 variability showed no signal in the CH4 variability; however, the isotopic analysis indicated a transient shift in the CH4 source to the waste sector (early summer of 2020).
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Affiliation(s)
- Abirlal Metya
- Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune, India; Department of Atmospheric and Space Sciences, Savitribai Phule Pune University, Pune, India
| | - Amey Datye
- Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune, India
| | - Supriyo Chakraborty
- Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune, India; Department of Atmospheric and Space Sciences, Savitribai Phule Pune University, Pune, India.
| | - Yogesh K Tiwari
- Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune, India
| | - Prabir K Patra
- Research Institute for Global Change, JAMSTEC, Yokohama 236-0001, Japan
| | - Charuta Murkute
- Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune, India
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14
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Bastos A, Ciais P, Sitch S, Aragão LEOC, Chevallier F, Fawcett D, Rosan TM, Saunois M, Günther D, Perugini L, Robert C, Deng Z, Pongratz J, Ganzenmüller R, Fuchs R, Winkler K, Zaehle S, Albergel C. On the use of Earth Observation to support estimates of national greenhouse gas emissions and sinks for the Global stocktake process: lessons learned from ESA-CCI RECCAP2. CARBON BALANCE AND MANAGEMENT 2022; 17:15. [PMID: 36183029 PMCID: PMC9526973 DOI: 10.1186/s13021-022-00214-w] [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: 04/20/2022] [Accepted: 09/04/2022] [Indexed: 06/16/2023]
Abstract
The Global Stocktake (GST), implemented by the Paris Agreement, requires rapid developments in the capabilities to quantify annual greenhouse gas (GHG) emissions and removals consistently from the global to the national scale and improvements to national GHG inventories. In particular, new capabilities are needed for accurate attribution of sources and sinks and their trends to natural and anthropogenic processes. On the one hand, this is still a major challenge as national GHG inventories follow globally harmonized methodologies based on the guidelines established by the Intergovernmental Panel on Climate Change, but these can be implemented differently for individual countries. Moreover, in many countries the capability to systematically produce detailed and annually updated GHG inventories is still lacking. On the other hand, spatially-explicit datasets quantifying sources and sinks of carbon dioxide, methane and nitrous oxide emissions from Earth Observations (EO) are still limited by many sources of uncertainty. While national GHG inventories follow diverse methodologies depending on the availability of activity data in the different countries, the proposed comparison with EO-based estimates can help improve our understanding of the comparability of the estimates published by the different countries. Indeed, EO networks and satellite platforms have seen a massive expansion in the past decade, now covering a wide range of essential climate variables and offering high potential to improve the quantification of global and regional GHG budgets and advance process understanding. Yet, there is no EO data that quantifies greenhouse gas fluxes directly, rather there are observations of variables or proxies that can be transformed into fluxes using models. Here, we report results and lessons from the ESA-CCI RECCAP2 project, whose goal was to engage with National Inventory Agencies to improve understanding about the methods used by each community to estimate sources and sinks of GHGs and to evaluate the potential for satellite and in-situ EO to improve national GHG estimates. Based on this dialogue and recent studies, we discuss the potential of EO approaches to provide estimates of GHG budgets that can be compared with those of national GHG inventories. We outline a roadmap for implementation of an EO carbon-monitoring program that can contribute to the Paris Agreement.
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Affiliation(s)
- Ana Bastos
- Dept. of Biogeochemical Integration, Max Planck Institute for Biogeochemistry, 07745, Jena, Germany.
| | - Philippe Ciais
- Laboratoire Des Sciences du Climat Et de L'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191, Gif-sur-Yvette, France
| | - Stephen Sitch
- Department of Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, UK
| | - Luiz E O C Aragão
- Department of Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, UK
- Tropical Ecosystems and Environmental Sciences Laboratory, São José dos Campos, SP, Brazil
- Remote Sensing Division, National Institute for Space Research, São José Dos Campos, SP, Brazil
| | - Frédéric Chevallier
- Laboratoire Des Sciences du Climat Et de L'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191, Gif-sur-Yvette, France
| | - Dominic Fawcett
- Department of Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, UK
| | - Thais M Rosan
- Department of Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, UK
| | - Marielle Saunois
- Laboratoire Des Sciences du Climat Et de L'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191, Gif-sur-Yvette, France
| | | | - Lucia Perugini
- Division On Climate Change Impacts On Agriculture, Forests and Ecosystem Services (IAFES), Foundation Euro-Mediterranean Center On Climate Change (CMCC), Viterbo, Italy
| | - Colas Robert
- Dept. AFOLU, Citepa, 42 rue de Paradis, 75010, Paris, France
| | - Zhu Deng
- Department of Earth System Science, Tsinghua University, Beijing, China
| | - Julia Pongratz
- Ludwig-Maximilians-Universität München, Luisenstr. 37, 80333, Munich, Germany
- Max Planck Institute for Meteorology, Bundesstr. 53, 20146, Hamburg, Germany
| | | | - Richard Fuchs
- Land Use Change & Climate Research Group, IMK-IFU, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Karina Winkler
- Land Use Change & Climate Research Group, IMK-IFU, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
- Laboratory of Geoinformation and Remote Sensing, Wageningen University & Research (WUR), Wageningen, The Netherlands
| | - Sönke Zaehle
- Dept. of Biogeochemical Integration, Max Planck Institute for Biogeochemistry, 07745, Jena, Germany
| | - Clément Albergel
- European Space Agency Climate Office, ECSAT, Harwell Campus, Didcot, UK
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15
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Jansen J, Woolway RI, Kraemer BM, Albergel C, Bastviken D, Weyhenmeyer GA, Marcé R, Sharma S, Sobek S, Tranvik LJ, Perroud M, Golub M, Moore TN, Råman Vinnå L, La Fuente S, Grant L, Pierson DC, Thiery W, Jennings E. Global increase in methane production under future warming of lake bottom waters. GLOBAL CHANGE BIOLOGY 2022; 28:5427-5440. [PMID: 35694903 PMCID: PMC9546102 DOI: 10.1111/gcb.16298] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 06/06/2022] [Accepted: 06/07/2022] [Indexed: 05/31/2023]
Abstract
Lakes are significant emitters of methane to the atmosphere, and thus are important components of the global methane budget. Methane is typically produced in lake sediments, with the rate of methane production being strongly temperature dependent. Local and regional studies highlight the risk of increasing methane production under future climate change, but a global estimate is not currently available. Here, we project changes in global lake bottom temperatures and sediment methane production rates from 1901 to 2099. By the end of the 21st century, lake bottom temperatures are projected to increase globally, by an average of 0.86-2.60°C under Representative Concentration Pathways (RCPs) 2.6-8.5, with greater warming projected at lower latitudes. This future warming of bottom waters will likely result in an increase in methane production rates of 13%-40% by the end of the century, with many low-latitude lakes experiencing an increase of up to 17 times the historical (1970-1999) global average under RCP 8.5. The projected increase in methane production will likely lead to higher emissions from lakes, although the exact magnitude of the emission increase requires more detailed regional studies.
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Affiliation(s)
- Joachim Jansen
- Department of Ecology and Genetics/LimnologyUppsala UniversityUppsalaSweden
| | | | - Benjamin M. Kraemer
- Ecosystem Research DepartmentIGB Leibniz Institute of Freshwater Ecology and Inland FisheriesBerlinGermany
| | - Clément Albergel
- European Space Agency Climate OfficeECSAT, Harwell CampusDidcotOxfordshireUK
| | - David Bastviken
- Department of Thematic Studies – Environmental ChangeLinköping UniversityLinköpingSweden
| | | | - Rafael Marcé
- Catalan Institute for Water ResearchGironaSpain
- University of GironaGironaSpain
| | - Sapna Sharma
- Department of BiologyYork UniversityTorontoOntarioCanada
| | - Sebastian Sobek
- Department of Ecology and Genetics/LimnologyUppsala UniversityUppsalaSweden
| | - Lars J. Tranvik
- Department of Ecology and Genetics/LimnologyUppsala UniversityUppsalaSweden
| | - Marjorie Perroud
- Institute for Environmental SciencesUniversity of GenevaGenèveSwitzerland
| | - Malgorzata Golub
- Centre for Freshwater and Environmental StudiesDundalk Institute of TechnologyDundalkIreland
| | - Tadhg N. Moore
- Department of Biological SciencesVirginia TechBlacksburgVirginiaUSA
| | - Love Råman Vinnå
- Eawag, Swiss Federal Institute of Aquatic Science and TechnologySurface Waters‐Research and ManagementKastanienbaumSwitzerland
| | - Sofia La Fuente
- Centre for Freshwater and Environmental StudiesDundalk Institute of TechnologyDundalkIreland
| | - Luke Grant
- Department of Hydrology and Hydraulic EngineeringVrije Universiteit BrusselBrusselsBelgium
| | - Don C. Pierson
- Department of Ecology and Genetics/LimnologyUppsala UniversityUppsalaSweden
| | - Wim Thiery
- Department of Hydrology and Hydraulic EngineeringVrije Universiteit BrusselBrusselsBelgium
| | - Eleanor Jennings
- Centre for Freshwater and Environmental StudiesDundalk Institute of TechnologyDundalkIreland
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16
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Smith PE, Kelly AK, Kenny DA, Waters SM. Differences in the Composition of the Rumen Microbiota of Finishing Beef Cattle Divergently Ranked for Residual Methane Emissions. Front Microbiol 2022; 13:855565. [PMID: 35572638 PMCID: PMC9099143 DOI: 10.3389/fmicb.2022.855565] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Accepted: 03/10/2022] [Indexed: 11/13/2022] Open
Abstract
With the advent of high throughput technology, it is now feasible to study the complex relationship of the rumen microbiota with methanogenesis in large populations of ruminant livestock divergently ranked for enteric emissions. Recently, the residual methane emissions (RME) concept has been identified as the optimal phenotype for assessing the methanogenic potential of ruminant livestock due to the trait's independence from animal productivity but strong correlation with daily methane emissions. However, there is currently a dearth of data available on the bacterial and archaeal microbial communities residing in the rumens of animals divergently ranked for RME. Therefore, the objective of this study was to investigate the relationship between the rumen microbiota and RME in a population of finishing beef cattle. Methane emissions were estimated from individual animals using the GreenFeed Emissions Monitoring system for 21 days over a mean feed intake measurement period of 91 days. Residual methane emissions were calculated for 282 crossbred finishing beef cattle, following which a ∼30% difference in all expressions of methane emissions was observed between high and low RME ranked animals. Rumen fluid samples were successfully obtained from 268 animals during the final week of the methane measurement period using a trans-oesophageal sampling device. Rumen microbial DNA was extracted and subjected to 16S rRNA amplicon sequencing. Animals ranked as low RME had the highest relative abundances (P < 0.05) of lactic-acid-producing bacteria (Intestinibaculum, Sharpea, and Olsenella) and Selenomonas, and the lowest (P < 0.05) proportions of Pseudobutyrivibrio, Butyrivibrio, and Mogibacterium. Within the rumen methanogen community, an increased abundance (P < 0.05) of the genus Methanosphaera and Methanobrevibacter RO clade was observed in low RME animals. The relative abundances of both Intestinibaculum and Olsenella were negatively correlated (P < 0.05) with RME and positively correlated with ruminal propionate. A similar relationship was observed for the abundance of Methanosphaera and the Methanobrevibacter RO clade. Findings from this study highlight the ruminal abundance of bacterial genera associated with the synthesis of propionate via the acrylate pathway, as well as the methanogens Methanosphaera and members of the Methanobrevibacter RO clade as potential microbial biomarkers of the methanogenic potential of beef cattle.
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Affiliation(s)
- Paul E. Smith
- Teagasc, Animal and Bioscience Research Department, Animal and Grassland Research and Innovation Centre, Meath, Ireland
- UCD School of Agricultural and Food Science, University College Dublin, Dublin, Ireland
| | - Alan K. Kelly
- UCD School of Agricultural and Food Science, University College Dublin, Dublin, Ireland
| | - David A. Kenny
- Teagasc, Animal and Bioscience Research Department, Animal and Grassland Research and Innovation Centre, Meath, Ireland
| | - Sinéad M. Waters
- Teagasc, Animal and Bioscience Research Department, Animal and Grassland Research and Innovation Centre, Meath, Ireland
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17
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Thompson RL, Groot Zwaaftink CD, Brunner D, Tsuruta A, Aalto T, Raivonen M, Crippa M, Solazzo E, Guizzardi D, Regnier P, Maisonnier M. Effects of extreme meteorological conditions in 2018 on European methane emissions estimated using atmospheric inversions. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2022; 380:20200443. [PMID: 34865527 PMCID: PMC8646144 DOI: 10.1098/rsta.2020.0443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 10/05/2021] [Indexed: 06/13/2023]
Abstract
The effect of the 2018 extreme meteorological conditions in Europe on methane (CH4) emissions is examined using estimates from four atmospheric inversions calculated for the period 2005-2018. For most of Europe, we find no anomaly in 2018 compared to the 2005-2018 mean. However, we find a positive anomaly for the Netherlands in April, which coincided with positive temperature and soil moisture anomalies suggesting an increase in biogenic sources. We also find a negative anomaly for the Netherlands for September-October, which coincided with a negative anomaly in soil moisture, suggesting a decrease in soil sources. In addition, we find a positive anomaly for Serbia in spring, summer and autumn, which coincided with increases in temperature and soil moisture, again suggestive of changes in biogenic sources, and the annual emission for 2018 was 33 ± 38% higher than the 2005-2017 mean. These results indicate that CH4 emissions from areas where the natural source is thought to be relatively small can still vary due to meteorological conditions. At the European scale though, the degree of variability over 2005-2018 was small, and there was negligible impact on the annual CH4 emissions in 2018 despite the extreme meteorological conditions. This article is part of a discussion meeting issue 'Rising methane: is warming feeding warming? (part 2)'.
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Affiliation(s)
- R. L. Thompson
- NILU – Norsk Institutt for Luftforskning, Kjeller, Norway
| | | | - D. Brunner
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
| | - A. Tsuruta
- Climate System Research, Finnish Meteorological Institute, Helsinki, Finland
| | - T. Aalto
- Climate System Research, Finnish Meteorological Institute, Helsinki, Finland
| | - M. Raivonen
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, Helsinki, Finland
| | - M. Crippa
- European Commission Joint Research Centre, Ispra, Italy
| | - E. Solazzo
- European Commission Joint Research Centre, Ispra, Italy
| | - D. Guizzardi
- European Commission Joint Research Centre, Ispra, Italy
| | - P. Regnier
- Biogeochemistry and Modeling of the Earth System (BGEOSYS), Université Libre de Bruxelles, Brussels, Belgium
| | - M. Maisonnier
- Biogeochemistry and Modeling of the Earth System (BGEOSYS), Université Libre de Bruxelles, Brussels, Belgium
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