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Title: Genes, isotopes, and ecosystem biogeochemistry. Dissecting methane flux at the leading edge of global change

This project integrates across three fields (microbiology, biogeochemistry, and modeling) to understand the mechanisms of methane cycling in thawing permafrost. We have made substantial progress in each area, and in cross-cutting interdisciplinary synthesis. Large releases of CH4 from thawing permafrost to the atmosphere, a strong positive feedback to global warming, are plausible but little is known about the controls on such release. Our project (“IsoGenie”) addresses the key question: What is the interplay of microbial communities and soil organic matter composition in the decomposition of organic C to CH4 across a permafrost thaw gradient?
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6]
  1. Univ. of Arizona, Tucson, AZ (United States)
  2. The Ohio State Univ., Columbus, OH (United States)
  3. Univ. of Queensland, St. Lucia (Australia)
  4. Florida State Univ., Tallahassee, FL (United States)
  5. Stockholm Univ. (Sweden)
  6. Univ. of New Hampshire, Durham, NH (United States)
Publication Date:
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Report Number(s):
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Resource Type:
Technical Report
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Related Information: McCalley, C.K., Woodcroft BJ, Hodgkins SB, Wehr, R.A., Kim EH, Mondav, R.; Crill PM, Chanton J, Rich VI, Tyson GW, Saleska SR, 2014. Methane dynamics regulated by microbial community response to permafrost thaw, Nature, 514: 478-481Hodgkins, S.B. M.M. Tfaily, C. K. McCalley, T.A. Logan, P.M. Crill, S.R. Saleska, V.I. Rich, and J.P. Chanton. 2014. Changes in peat chemistry associated with permafrost thaw increase greenhouse gas production. Proc. Nat. Acad. Sci. doi: 10.1073/pnas.1314641111 Mondav R, Woodcroft BJ, Kim EH, McCalley CK, Hodgkins SB, Crill PM, Chanton J, Hurst GB, Verberkmoes NC, Saleska SR, Hugenholtz P, Rich VI, Tyson GW. 2014. Discovery of a novel methanogen prevalent in thawing permafrost. Nature Communications. 5: 3212. doi: 10.1038/ncomms4212.Imelfort M, Parks D, Woodcroft BJ, Dennis P, Hugenholtz P, Tyson GW. GroopM: an automated tool for the recovery of population genomes from related metagenomes. PeerJ. 2014;2:e603
Research Org:
University of Arizona, Tucson, AZ (United States)
Sponsoring Org:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Country of Publication:
United States
54 ENVIRONMENTAL SCIENCES Metagenomics; methane; permafrost; isotopes