Articles | Volume 17, issue 4
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

Related authors

Fractionation of stable carbon isotopes during microbial propionate consumption in anoxic rice paddy soils
Ralf Conrad and Peter Claus
EGUsphere,,, 2023
Short summary
Fractionation of stable carbon isotopes during acetate consumption by methanogenic and sulfidogenic microbial communities in rice paddy soils and lake sediments
Ralf Conrad, Pengfei Liu, and Peter Claus
Biogeosciences, 18, 6533–6546,,, 2021
Short summary
Diversity and seasonal dynamics of airborne archaea
J. Fröhlich-Nowoisky, C. Ruzene Nespoli, D. A. Pickersgill, P. E. Galand, I. Müller-Germann, T. Nunes, J. Gomes Cardoso, S. M. Almeida, C. Pio, M. O. Andreae, R. Conrad, U. Pöschl, and V. R. Després
Biogeosciences, 11, 6067–6079,,, 2014
Short summary
Straw application in paddy soil enhances methane production also from other carbon sources
Q. Yuan, J. Pump, and R. Conrad
Biogeosciences, 11, 237–246,,, 2014

Related subject area

Biogeochemistry: Sediment
Assessing global-scale organic matter reactivity patterns in marine sediments using a lognormal reactive continuum model
Sinan Xu, Bo Liu, Sandra Arndt, Sabine Kasten, and Zijun Wu
Biogeosciences Discuss.,,, 2022
Preprint under review for BG
Short summary
Deposit-feeding of Nonionellina labradorica (foraminifera) from an Arctic methane seep site and possible association with a methanotroph
Christiane Schmidt, Emmanuelle Geslin, Joan M. Bernhard, Charlotte LeKieffre, Mette Marianne Svenning, Helene Roberge, Magali Schweizer, and Giuliana Panieri
Biogeosciences, 19, 3897–3909,,, 2022
Short summary
Benthic silicon cycling in the Arctic Barents Sea: a reaction–transport model study
James P. J. Ward, Katharine R. Hendry, Sandra Arndt, Johan C. Faust, Felipe S. Freitas, Sian F. Henley, Jeffrey W. Krause, Christian März, Allyson C. Tessin, and Ruth L. Airs
Biogeosciences, 19, 3445–3467,,, 2022
Short summary
Long-term incubations provide insight into the mechanisms of anaerobic oxidation of methane in methanogenic lake sediments
Hanni Vigderovich, Werner Eckert, Michal Elul, Maxim Rubin-Blum, Marcus Elvert, and Orit Sivan
Biogeosciences, 19, 2313–2331,,, 2022
Short summary
Ideas and perspectives: Sea-level change, anaerobic methane oxidation, and the glacial–interglacial phosphorus cycle
Bjorn Sundby, Pierre Anschutz, Pascal Lecroart, and Alfonso Mucci
Biogeosciences, 19, 1421–1434,,, 2022
Short summary

Cited articles

Beulig, F., Roey, H., Glombitza, C., and Joergensen, B. B.: Control on rate and pathway of anaerobic organic carbon degradation in the seabed, P. Natl. Acad. Sci. USA, 115, 367–372, 2018. 
Christensen, D. and Blackburn, T. H.: Turnover of 14C-labelled acetate in marine sediments, Mar. Biol., 71, 113–119, 1982. 
Coates, J. D., Ellis, D. J., Blunt-Harris, E. L., Gaw, C. V., Roden, E. E., and Lovley, D. R.: Recovery of humic-reducing bacteria from a diversity of environments, Appl. Environ. Microbiol., 64, 1504–1509, 1998. 
Conrad, R.: Contribution of hydrogen to methane production and control of hydrogen concentrations in methanogenic soils and sediments, FEMS Microbiol. Ecol., 28, 193–202, 1999. 
Conrad, R., Mayer, H. P., and Wüst, M.: Temporal change of gas metabolism by hydrogen-syntrophic methanogenic bacterial associations in anoxic paddy soil, FEMS Microbiol. Ecol., 62, 265–274, 1989. 
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.
Final-revised paper