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

Saleska, Scott¹  Rich, Virginia²  Tyson, Gene³  Chanton, Jeff⁴  Crill, Patrick⁵  Li, Changshen⁶ 

[1] Univ. of Arizona, Tucson, AZ (United States);The Ohio State Univ., Columbus, OH (United States);Univ. of Queensland, St. Lucia (Australia);Florida State Univ., Tallahassee, FL (United States);Stockholm Univ. (Sweden);Univ. of New Hampshire, Durham, NH (United States)

关键词: Metagenomics;    methane;    permafrost;    isotopes;   

DOI  :  10.2172/1238719
RP-ID  :  DOE-Arizona--04632
PID  :  OSTI ID: 1238719
Others  :  Other: 5204613330

学科分类：环境科学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

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?