globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.12580
论文题名:
A synthesis of methane emissions from 71 northern, temperate, and subtropical wetlands
作者: Turetsky M.R.; Kotowska A.; Bubier J.; Dise N.B.; Crill P.; Hornibrook E.R.C.; Minkkinen K.; Moore T.R.; Myers-Smith I.H.; Nykänen H.; Olefeldt D.; Rinne J.; Saarnio S.; Shurpali N.; Tuittila E.-S.; Waddington J.M.; White J.R.; Wickland K.P.; Wilmking M.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期:7
起始页码: 2183
结束页码: 2197
语种: 英语
英文关键词: Bog ; Carbon ; Disturbance ; Fen ; Graminoids ; Peat ; Swamp ; Temperature ; Vegetation ; Water table
Scopus关键词: carbon emission ; environmental conditions ; environmental disturbance ; methane ; peatland ; soil emission ; subtropical region ; swamp ; temperate environment ; vegetation dynamics ; water table ; wetland ; ground water ; methane ; soil ; chemistry ; environment ; geography ; metabolism ; soil ; temperature ; wetland ; Environment ; Geography ; Groundwater ; Methane ; Soil ; Temperature ; Wetlands
英文摘要: Wetlands are the largest natural source of atmospheric methane. Here, we assess controls on methane flux using a database of approximately 19 000 instantaneous measurements from 71 wetland sites located across subtropical, temperate, and northern high latitude regions. Our analyses confirm general controls on wetland methane emissions from soil temperature, water table, and vegetation, but also show that these relationships are modified depending on wetland type (bog, fen, or swamp), region (subarctic to temperate), and disturbance. Fen methane flux was more sensitive to vegetation and less sensitive to temperature than bog or swamp fluxes. The optimal water table for methane flux was consistently below the peat surface in bogs, close to the peat surface in poor fens, and above the peat surface in rich fens. However, the largest flux in bogs occurred when dry 30-day averaged antecedent conditions were followed by wet conditions, while in fens and swamps, the largest flux occurred when both 30-day averaged antecedent and current conditions were wet. Drained wetlands exhibited distinct characteristics, e.g. the absence of large flux following wet and warm conditions, suggesting that the same functional relationships between methane flux and environmental conditions cannot be used across pristine and disturbed wetlands. Together, our results suggest that water table and temperature are dominant controls on methane flux in pristine bogs and swamps, while other processes, such as vascular transport in pristine fens, have the potential to partially override the effect of these controls in other wetland types. Because wetland types vary in methane emissions and have distinct controls, these ecosystems need to be considered separately to yield reliable estimates of global wetland methane release. © 2014 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62050
Appears in Collections:影响、适应和脆弱性

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作者单位: Department of Integrative Biology, University of Guelph, Guelph, ON, Canada; Environmental Studies Department, Mount Holyoke College, 50 College Street, South Hadley, MA, 01075, United States; School of Science and the Environment, Manchester Metropolitan University, Manchester, M15 6BH, United Kingdom; Department of Geological Sciences, Stockholm University, Stockholm, 106 91, Sweden; School of Earth Sciences, University of Bristol, Wills Memorial Building, Queen's Road, Bristol, BS8 1RJ, United Kingdom; Department of Forest Sciences, University of Helsinki, P.O. Box 27, Helsinki, FI-00014, Finland; Department of Geography and Global Environmental and Climate Change Centre, McGill University, Montreal, QC, H3A 0B9, Canada; School of GeoSciences, University of Edinburgh, 113 Crew Building, The King's Buildings, West Mains Road, Edinburgh, EH9 3JN, United Kingdom; Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35, Jyväskylä, FI-40014, Finland; Department of Physics and the Department of Geosciences and Geography, University of Helsinki, P.O. Box 64, Helsinki, FI-00014, Finland; Department of Biology, University of Eastern Finland and Finnish Environment Institute, The Joensuu Office, PL 111, Joensuu, 80101, Finland; Department of Environmental Science, University of Eastern Finland, P.O. Box 1627, FI-70211 Kuopio, Finland; School of Forestry, University of Eastern Finland, Joensuu, Finland; School of Geography and Earth Sciences, McMaster University, Hamilton, ON, L8S4L, Canada; School of Public and Environmental Affairs, Indiana University, Bloomington, IN, 47405-2204, United States; US Geological Survey, 3215 Marine St., Suite E-127, Boulder, CO, 80303, United States; Institute of Botany and Landscape Ecology, University Greifswald, Grimmer Strasse 88, Greifswald, D-17487, Germany

Recommended Citation:
Turetsky M.R.,Kotowska A.,Bubier J.,et al. A synthesis of methane emissions from 71 northern, temperate, and subtropical wetlands[J]. Global Change Biology,2014-01-01,20(7)
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