Articles | Volume 17, issue 4
https://doi.org/10.5194/bg-17-1063-2020
https://doi.org/10.5194/bg-17-1063-2020
Research article
 | 
26 Feb 2020
Research article |  | 26 Feb 2020

Acetate turnover and methanogenic pathways in Amazonian lake sediments

Ralf Conrad, Melanie Klose, and Alex Enrich-Prast

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Short summary
Lake sediments release the greenhouse gas CH4. Acetate is an important precursor. Although Amazonian lake sediments all contained acetate-consuming methanogens, measurement of the turnover of labeled acetate showed that some sediments converted acetate not to CH4 plus CO2, as expected, but only to CO2. Our results indicate the operation of acetate-oxidizing microorganisms couples the oxidation process to syntrophic methanogenic partners and/or to the reduction of organic compounds.
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