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A pan-Arctic synthesis of CH4 and CO2 production from anoxic soil incubations.
Treat, Claire C; Natali, Susan M; Ernakovich, Jessica; Iversen, Colleen M; Lupascu, Massimo; McGuire, Anthony David; Norby, Richard J; Roy Chowdhury, Taniya; Richter, Andreas; Santrucková, Hana; Schädel, Christina; Schuur, Edward A G; Sloan, Victoria L; Turetsky, Merritt R; Waldrop, Mark P.
Affiliation
  • Treat CC; Earth Systems Research Center, Institute for the Study of Earth, Oceans & Space, University of New Hampshire, 8 College Road, Durham, 03824, NH, USA.
  • Natali SM; Woods Hole Research Center, 149 Woods Hole Road, Falmouth, 02540, MA, USA.
  • Ernakovich J; Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO, USA.
  • Iversen CM; Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, One Bethel Valley Road Building 1062, Oak Ridge, 37831-6422, TN, USA.
  • Lupascu M; Department of Earth System Science, University of California, Croul Hall, Irvine, 92697, CA, USA.
  • McGuire AD; U.S. Geological Survey, Alaska Cooperative Fish and Wildlife Research Unit, University of Alaska Fairbanks, 214 Irving I Builidng, Fairbanks, 99775, AK, USA.
  • Norby RJ; Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, One Bethel Valley Road Building 1062, Oak Ridge, 37831-6422, TN, USA.
  • Roy Chowdhury T; Biosciences Division, Oak Ridge National Laboratory, 1 Bethel Valley Road MS 6038, Oak Ridge, 37830, TN, USA.
  • Richter A; Department of Microbiology and Ecosystem Science, University of Vienna, Althenstrasse 14, 1090, Vienna, Austria.
  • Santrucková H; Austrian Polar Research Institute, Althenstrasse 14, 1090, Vienna, Austria.
  • Schädel C; Department of Ecosystem Biology, University of South Bohemia, Branisovska 31, Ceské Budejovice, 37005, Czech Republic.
  • Schuur EAG; Department of Biology, University of Florida, 421 Carr Hall, PO Box 118525, Gainesville, FL, 32611, USA.
  • Sloan VL; Department of Biology, University of Florida, 421 Carr Hall, PO Box 118525, Gainesville, FL, 32611, USA.
  • Turetsky MR; Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, One Bethel Valley Road Building 1062, Oak Ridge, 37831-6422, TN, USA.
  • Waldrop MP; Department of Integrative Biology, University of Guelph, Science Complex, Guelph, N1G 1G2, ON, Canada.
Glob Chang Biol ; 21(7): 2787-2803, 2015 Jul.
Article in En | MEDLINE | ID: mdl-25620695
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.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Type of study: Prognostic_studies Language: En Journal: Glob Chang Biol Year: 2015 Document type: Article Affiliation country: United States Country of publication: United kingdom

Full text: 1 Collection: 01-internacional Database: MEDLINE Type of study: Prognostic_studies Language: En Journal: Glob Chang Biol Year: 2015 Document type: Article Affiliation country: United States Country of publication: United kingdom