Articles | Volume 19, issue 8
https://doi.org/10.5194/bg-19-2313-2022
https://doi.org/10.5194/bg-19-2313-2022
Research article
 | 
02 May 2022
Research article |  | 02 May 2022

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

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Cited articles

Adler, M., Eckert, W., and Sivan, O.: Quantifying rates of methanogenesis and methanotrophy in Lake Kinneret sediments (Israel) using porewater profiles, Limnol. Oceanogr., 56, 1525–1535, https://doi.org/10.4319/lo.2011.56.4.1525, 2011. 
Aepfler, R. F., Bühring, S. I., and Elvert, M.: Substrate characteristic bacterial fatty acid production based on amino acid assimilation and transformation in marine sediments, FEMS Microbiol. Ecol., 95, 1–15, https://doi.org/10.1093/femsec/fiz131, 2019. 
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Bai, Y. N., Wang, X. N., Wu, J., Lu, Y. Z., Fu, L., Zhang, F., Lau, T. C., and Zeng, R. J.: Humic substances as electron acceptors for anaerobic oxidation of methane driven by ANME-2d, Water Res., 164, 114935, https://doi.org/10.1016/j.watres.2019.114935, 2019. 
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Short summary
Anaerobic oxidation of methane (AOM) is one of the major processes limiting the release of the greenhouse gas methane from natural environments. Here we show that significant AOM exists in the methane zone of lake sediments in natural conditions and even after long-term (ca. 18 months) anaerobic slurry incubations with two stages. Methanogens were most likely responsible for oxidizing the methane, and humic substances and iron oxides are likely electron acceptors to support this oxidation.
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