Biogeosciences
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Articles | Volume 22, issue 17
Articles | Volume 22, issue 17
https://doi.org/10.5194/bg-22-4449-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-4449-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 17
Research article
 | 
09 Sep 2025
Research article |  | 09 Sep 2025

Methanogenesis by CO2 reduction dominates lake sediments with different organic matter compositions

Guangyi Su, Julie Tolu, Clemens Glombitza, Jakob Zopfi, Moritz F. Lehmann, Mark A. Lever, and Carsten J. Schubert

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Short summary
In Lake Geneva, we studied how different types of organic matter affect methane production. Despite varying sources, like algae and land-based materials, both deep and delta areas are significant methane sources, and methane was mainly produced through CO2 reduction. Surprisingly, the origin of organic matter did not strongly influence methane production rates or pathways. Our findings highlight the need to better understand microbial processes to predict methane emissions from lakes.
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