Articles | Volume 17, issue 4
Biogeosciences, 17, 1063–1069, 2020
https://doi.org/10.5194/bg-17-1063-2020
Biogeosciences, 17, 1063–1069, 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 et al.

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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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AR: Author's response | RR: Referee report | ED: Editor decision
ED: Reconsider after major revisions (05 Dec 2019) by Tina Treude
AR by Anna Wenzel on behalf of the Authors (08 Jan 2020)  Author's response
ED: Referee Nomination & Report Request started (14 Jan 2020) by Tina Treude
RR by Anonymous Referee #1 (28 Jan 2020)
ED: Publish subject to technical corrections (29 Jan 2020) by Tina Treude
AR by Ralf Conrad on behalf of the Authors (30 Jan 2020)  Author's response    Manuscript
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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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