globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.12875
论文题名:
A pan-Arctic synthesis of CH<inf>4</inf> and CO<inf>2</inf> production from anoxic soil incubations
作者: Treat C.C.; Natali S.M.; Ernakovich J.; Iversen C.M.; Lupascu M.; Mcguire A.D.; Norby R.J.; Roy Chowdhury T.; Richter A.; Šantrůčková H.; Schädel C.; Schuur E.A.G.; Sloan V.L.; Turetsky M.R.; Waldrop M.P.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期:7
起始页码: 2787
结束页码: 2803
语种: 英语
英文关键词: Anaerobic incubation ; Arctic ; Boreal ; Carbon dioxide ; Climate change ; Methane ; Permafrost
Scopus关键词: anoxic conditions ; carbon dioxide ; carbon emission ; climate change ; environmental conditions ; methane ; permafrost ; thawing ; Arctic
英文摘要: Permafrost thaw can alter the soil environment through changes in soil moisture, frequently resulting in soil saturation, a shift to anaerobic decomposition, and changes in the plant community. These changes, along with thawing of previously frozen organic material, can alter the form and magnitude of greenhouse gas production from permafrost ecosystems. We synthesized existing methane (CH4) and carbon dioxide (CO2) production measurements from anaerobic incubations of boreal and tundra soils from the geographic permafrost region to evaluate large-scale controls of anaerobic CO2 and CH4 production and compare the relative importance of landscape-level factors (e.g., vegetation type and landscape position), soil properties (e.g., pH, depth, and soil type), and soil environmental conditions (e.g., temperature and relative water table position). We found fivefold higher maximum CH4 production per gram soil carbon from organic soils than mineral soils. Maximum CH4 production from soils in the active layer (ground that thaws and refreezes annually) was nearly four times that of permafrost per gram soil carbon, and CH4 production per gram soil carbon was two times greater from sites without permafrost than sites with permafrost. Maximum CH4 and median anaerobic CO2 production decreased with depth, while CO2:CH4 production increased with depth. Maximum CH4 production was highest in soils with herbaceous vegetation and soils that were either consistently or periodically inundated. This synthesis identifies the need to consider biome, landscape position, and vascular/moss vegetation types when modeling CH4 production in permafrost ecosystems and suggests the need for longer-term anaerobic incubations to fully capture CH4 dynamics. Our results demonstrate that as climate warms in arctic and boreal regions, rates of anaerobic CO2 and CH4 production will increase, not only as a result of increased temperature, but also from shifts in vegetation and increased ground saturation that will accompany permafrost thaw. © 2015 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/61768
Appears in Collections:影响、适应和脆弱性

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作者单位: Earth Systems Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, 8 College Road, Durham, United States; Woods Hole Research Center, 149 Woods Hole Road, Falmouth, United States; Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO, United States; Environmental Sciences Division, Climate Change Science Institute, Oak Ridge National Laboratory, One Bethel Valley Road Building 1062, Oak Ridge, United States; Department of Earth System Science, University of California, Croul Hall, Irvine, United States; U.S. Geological Survey, Alaska Cooperative Fish and Wildlife Research Unit, University of Alaska Fairbanks, 214 Irving I Builidng, Fairbanks, United States; Biosciences Division, Oak Ridge National Laboratory, 1 Bethel Valley Road MS 6038, Oak Ridge, United States; Department of Microbiology and Ecosystem Science, University of Vienna, Althenstrasse 14, Vienna, Austria; Austrian Polar Research Institute, Althenstrasse 14, Vienna, Austria; Department of Ecosystem Biology, University of South Bohemia, Branisovska 31, České Budějovice, Czech Republic; Department of Biology, University of Florida, 421 Carr Hall, PO Box 118525, Gainesville, FL, United States; Department of Integrative Biology, University of Guelph, Science Complex, Guelph, Canada; U.S. Geological Survey, 345 Middlefield Rd, MS 962, Menlo Park, United States; Water and Environmental Research Center, University of Alaska Fairbanks, Fairbanks, AK, United States; Agriculture Flagship, CSIRO, Adelaide, SA, Australia; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, United States

Recommended Citation:
Treat C.C.,Natali S.M.,Ernakovich J.,et al. A pan-Arctic synthesis of CH<inf>4</inf> and CO<inf>2</inf> production from anoxic soil incubations[J]. Global Change Biology,2015-01-01,21(7)
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