Biogeochemistry of Methane Exchange between Natural Wetlands and the Atmosphere
Top Cited Papers
- 1 January 2005
- journal article
- research article
- Published by Mary Ann Liebert Inc in Environmental Engineering Science
- Vol. 22 (1), 73-94
- https://doi.org/10.1089/ees.2005.22.73
Abstract
This review examines the interactions among physical, chemical, and biological factors responsible for methane (CH4) emission from natural wetlands. Methane is a chemically and radiatively important atmospheric trace gas. Emission from wetlands is a significant component of the atmospheric CH4 budget, releasing 145 Tg CH4 annually to the atmosphere, or about 25% of total emissions from all anthropogenic and natural sources. Wetlands are characterized by a subsurface, anaerobic zone of CH4 production by methanogenic bacteria and an surficial, aerobic zone of CH4 oxidation by methanotrophic bacteria. Wetlands transfer CH4 to the atmosphere by diffusion, ebullition, and by transport through arenchymous vascular plants. However, about 20 to 40% of the CH4 produced in anaerobic wetland soils is oxidized in the rhizosphere and in surficial oxic layers during diffusive transport to the soil surface. Rates of CH4 emission in wetlands are commonly 100 mg m-2 day-1, and represent the net effect of production and consumption. Water table position, temperature, and plant community composition are important ecosystemlevel controls on wetland CH4 emission.Keywords
This publication has 176 references indexed in Scilit:
- Atmospheric sulfur deposition alters pathways of gaseous carbon production in peatlandsGlobal Biogeochemical Cycles, 2003
- Measurements of an anomalous global methane increase during 1998Geophysical Research Letters, 2001
- Methane stable isotope distribution at a Carex dominated fen in north central AlbertaGlobal Biogeochemical Cycles, 1999
- Controls on CH4 emissions from a northern peatlandGlobal Biogeochemical Cycles, 1999
- Consumption of atmospheric methane by soils: A process‐based modelGlobal Biogeochemical Cycles, 1999
- Methane emission and transport by arctic sedges in Alaska: Results of a vegetation removal experimentJournal of Geophysical Research: Solid Earth, 1998
- Changes in tropospheric methane between 1841 and 1978 from a high accumulation-rate Antarctic ice coreTellus B: Chemical and Physical Meteorology, 1992
- Spatial and temporal variations of methane flux from subarctic/northern boreal fensGlobal Biogeochemical Cycles, 1990
- Isolation and Characterization of Methanobacterium espanolae sp. nov., a Mesophilic, Moderately Acidiphilic MethanogenInternational Journal of Systematic and Evolutionary Microbiology, 1990
- Methane production in contrasting wetland sites: Response to organic‐chemical components of peat and to sulfate reductionGeomicrobiology Journal, 1990