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Nature 440, 878-879 (13 April 2006) | doi:10.1038/440878a; Published online 12 April 2006

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Biogeochemistry: Methane and microbes

Rudolf K. Thauer1 & Seigo Shima1

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Microorganisms can carry out a wonderful range of chemical transformations. The anaerobic oxidation of methane seemed not to be among them. But it is — both with sulphate, and now it turns out, with nitrate.

Methane is not only a fossil fuel but also a key player in the carbon cycle. About 1% of the carbon dioxide annually fixed by photosynthesis is converted back to carbon dioxide by microorganisms via methane, which amounts to 1 billion tonnes of methane formed and consumed per year.

  1. Rudolf K. Thauer and Seigo Shima are at the Max Planck Institute for Terrestrial Microbiology, Karl-von-Frisch-Strasse, D-35043 Marburg, Germany.
    Email: thauer@mpi-marburg.mpg.de

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