Methane emissions and microbial communities under differing flooding conditions and seasons in littoral wetlands of urban lake

Environmental Research, Journal Year: 2024, Volume and Issue: 250, P. 118390 - 118390

Published: Feb. 7, 2024

Language: Английский

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Temporal Variations in Methane Emissions from a Restored Mangrove Ecosystem in Southern China

Forests, Journal Year: 2024, Volume and Issue: 15(9), P. 1487 - 1487

Published: Aug. 24, 2024

The role of coastal mangrove wetlands in sequestering atmospheric carbon dioxide has been increasingly investigated recent years. While studies have shown that mangroves are weak sources methane (CH4) emissions, measurements CH4 fluxes from these ecosystems remain scarce. In this study, we examined the temporal variation and biophysical drivers ecosystem-scale China’s northernmost ecosystem based on eddy covariance obtained over a 3-year period. mangrove, annual emissions ranged 6.15 to 9.07 g C m−2 year−1. daily flux reached peak 0.07 day−1 during summer, while winter was negligible. Latent heat, soil temperature, photosynthetically active radiation, tide water level were primary factors controlling emissions. This study not only elucidates mechanisms influencing mangroves, strengthening understanding processes but also provides valuable benchmark dataset validate model-derived budget estimates for ecosystems.

Language: Английский

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Elevating water table reduces net ecosystem carbon losses from global drained wetlands

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(9)

Published: Sept. 1, 2024

Abstract Drained wetlands are thought to be carbon (C) source hotspots, and rewetting is advocated restore C storage in drained for climate change mitigation. However, current assessments of wetland balance mainly focus on vertical fluxes between the land atmosphere, frequently neglecting lateral land‐use effects. Here, we conduct a global synthesis 893 annual net ecosystem (NECB) measures that include exchange CO 2 , along with input via manure fertilization, removal through biomass harvest or hydrological exports dissolved organic inorganic carbon, across different status uses. We find elevating water table substantially reduces losses, NECB decreasing from 2579 (95% interval: 1976 3214) kg ha −1 year −422 (−658 −176) natural wetlands, −934 (−1532 −399) rewetted globally. Climate, history, time since changes introduce variabilities, drainage (sub)tropical agriculture forestry uses showing high while losses can continue affect soil pools several decades. Rewetting all types needed, particularly those formerly agriculture‐used where largely reduced. Our findings suggest an important initiative reduce degraded which could contribute policy decisions managing enhance their sequestration.

Language: Английский

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Simultaneous Hot and Dry Extreme‐Events Increase Wetland Methane Emissions: An Assessment of Compound Extreme‐Event Impacts Using Ameriflux and FLUXNET‐CH₄ Site Data Sets

Global Biogeochemical Cycles, Journal Year: 2024, Volume and Issue: 38(9)

Published: Sept. 1, 2024

Abstract Wetlands are the largest natural source of global atmospheric methane (CH 4 ). Despite advances to our understanding changes in temperature and precipitation extremes, their impacts on carbon‐rich ecosystems such as wetlands, remain significantly understudied. Here, we quantify extreme temperature, precipitation, dry events wetland CH dynamics by investigating effects both compound discrete extreme‐events. We use long‐term climate data identify extreme‐events 45 eddy covariance sites sets sourced from FLUXNET‐CH database Ameriflux project assess emissions. These findings reveal that hot + lead large increases daily However, per event, dry‐only cause total decrease emissions, due long duration. leading an overall reduction enhanced fluxes often observed for first days differ depending type, where marsh tend be sensitive most types Lagged significant at least 12 months following several have implications how extreme‐event may evolve context change, frequency intensity already observed. With increasing occurrences response hot‐only wet fewer reduced during cold‐only extreme‐events, impact emissions warming increasing.

Language: Английский

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Article I. Analysis of methane emission characteristics and environmental response in natural wetlands

Atmospheric Environment, Journal Year: 2024, Volume and Issue: 334, P. 120696 - 120696

Published: Oct. 1, 2024

Language: Английский

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Wetland CH4 and CO2 emissions show opposite temperature dependencies along global climate gradients

CATENA, Journal Year: 2024, Volume and Issue: 248, P. 108557 - 108557

Published: Nov. 21, 2024

Language: Английский

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Study of atmospheric CH4, CO2 and N2O at Waliguan WMO/GAW global station: Time series trend, seasonal variation, and attribution analysis association with meteorological factors

Atmospheric Environment, Journal Year: 2024, Volume and Issue: unknown, P. 120994 - 120994

Published: Dec. 1, 2024

Language: Английский

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How do different ant species mediate CH4 fluxes in slash-burn tropical forest soils?

Soil and Tillage Research, Journal Year: 2024, Volume and Issue: 248, P. 106432 - 106432

Published: Dec. 24, 2024

Language: Английский

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Analysis of Methane Emission Characteristics and Environmental Response in Natural Wetlands

Published: Jan. 1, 2023

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Language: Английский

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