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Environ Microbiol Rep. 2009 Oct;1(5):285-92. doi: 10.1111/j.1758-2229.2009.00038.x. Epub 2009 Jun 10.

The global methane cycle: recent advances in understanding the microbial processes involved.

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1
Max-Planck-Institute for Terrestrial Microbiology, Karl-von-Frisch-Str.8, 35043 Marburg, Germany.

Abstract

The global budget of atmospheric CH4 , which is on the order of 500-600 Tg CH4 per year, is mainly the result of environmental microbial processes, such as archaeal methanogenesis in wetlands, rice fields, ruminant and termite digestive systems and of microbial methane oxidation under anoxic and oxic conditions. This review highlights recent progress in the research of anaerobic CH4 oxidation, of CH4 production in the plant rhizosphere, of CH4 serving as substrate for the aquatic trophic food chain and the discovery of novel aerobic methanotrophs. It also emphasizes progress and deficiencies in our knowledge of microbial utilization of low atmospheric CH4 concentrations in soil, CH4 production in the plant canopy, intestinal methanogenesis and CH4 production in pelagic water.

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