Wetland hydrological dynamics and methane emissions

Shihao Cui; Pengfei Liu; Haonan Guo; Claudia Kalla Nielsen; Johannes Wilhelmus Maria Pullens; Qing Chen; Lorenzo Pugliese; Shubiao Wu

doi:10.1038/s43247-024-01635-w

Wetland hydrological dynamics and methane emissions

Shihao Cui, Pengfei Liu, Haonan Guo, Claudia Kalla Nielsen, Johannes Wilhelmus Maria Pullens, Qing Chen, Lorenzo Pugliese, Shubiao Wu^*

^*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Review › Research › peer-review

Abstract

Wetlands are the largest and most uncertain biological source of atmospheric methane, with hydrological fluctuations exacerbating this uncertainty. Here we critically explore the complex relationship between hydrological fluctuations and methane emissions in wetlands by integrating observations from 31 FLUXNET wetland sites with a comprehensive literature review. We present the prevalence and patterns of water table fluctuations and their contribution to uncertainty in methane fluxes. We also highlight key pathways through which these fluctuations affect methane production and emission, such as soil redox heterogeneity, changes in substrate availability and alternative electron acceptor pool, the contribution of different methane transport pathways, and the non-linear responses of community structure and activity of methanogens and methanotrophs to hydrological fluctuations. This review aims to improve the accuracy of wetland methane emission reports by carefully assessing biogeochemical kinetics under hydrological fluctuations. (Figure presented.)

Original language	English
Article number	470
Journal	Communications Earth and Environment
Volume	5
ISSN	2662-4435
DOIs	https://doi.org/10.1038/s43247-024-01635-w
Publication status	Published - Aug 2024

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title = "Wetland hydrological dynamics and methane emissions",

abstract = "Wetlands are the largest and most uncertain biological source of atmospheric methane, with hydrological fluctuations exacerbating this uncertainty. Here we critically explore the complex relationship between hydrological fluctuations and methane emissions in wetlands by integrating observations from 31 FLUXNET wetland sites with a comprehensive literature review. We present the prevalence and patterns of water table fluctuations and their contribution to uncertainty in methane fluxes. We also highlight key pathways through which these fluctuations affect methane production and emission, such as soil redox heterogeneity, changes in substrate availability and alternative electron acceptor pool, the contribution of different methane transport pathways, and the non-linear responses of community structure and activity of methanogens and methanotrophs to hydrological fluctuations. This review aims to improve the accuracy of wetland methane emission reports by carefully assessing biogeochemical kinetics under hydrological fluctuations. (Figure presented.)",

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T1 - Wetland hydrological dynamics and methane emissions

AU - Cui, Shihao

AU - Liu, Pengfei

AU - Guo, Haonan

AU - Nielsen, Claudia Kalla

AU - Pullens, Johannes Wilhelmus Maria

AU - Chen, Qing

AU - Pugliese, Lorenzo

AU - Wu, Shubiao

PY - 2024/8

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N2 - Wetlands are the largest and most uncertain biological source of atmospheric methane, with hydrological fluctuations exacerbating this uncertainty. Here we critically explore the complex relationship between hydrological fluctuations and methane emissions in wetlands by integrating observations from 31 FLUXNET wetland sites with a comprehensive literature review. We present the prevalence and patterns of water table fluctuations and their contribution to uncertainty in methane fluxes. We also highlight key pathways through which these fluctuations affect methane production and emission, such as soil redox heterogeneity, changes in substrate availability and alternative electron acceptor pool, the contribution of different methane transport pathways, and the non-linear responses of community structure and activity of methanogens and methanotrophs to hydrological fluctuations. This review aims to improve the accuracy of wetland methane emission reports by carefully assessing biogeochemical kinetics under hydrological fluctuations. (Figure presented.)

AB - Wetlands are the largest and most uncertain biological source of atmospheric methane, with hydrological fluctuations exacerbating this uncertainty. Here we critically explore the complex relationship between hydrological fluctuations and methane emissions in wetlands by integrating observations from 31 FLUXNET wetland sites with a comprehensive literature review. We present the prevalence and patterns of water table fluctuations and their contribution to uncertainty in methane fluxes. We also highlight key pathways through which these fluctuations affect methane production and emission, such as soil redox heterogeneity, changes in substrate availability and alternative electron acceptor pool, the contribution of different methane transport pathways, and the non-linear responses of community structure and activity of methanogens and methanotrophs to hydrological fluctuations. This review aims to improve the accuracy of wetland methane emission reports by carefully assessing biogeochemical kinetics under hydrological fluctuations. (Figure presented.)

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U2 - 10.1038/s43247-024-01635-w

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Wetland hydrological dynamics and methane emissions

Abstract

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