Biogeosciences
Biogeosciences
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Articles | Volume 22, issue 19
Articles | Volume 22, issue 19
https://doi.org/10.5194/bg-22-5483-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-5483-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 19
Research article
 | 
10 Oct 2025
Research article |  | 10 Oct 2025

Microbial sulfur cycling across a 13 500-year-old lake sediment record

Jasmine S. Berg, Paula C. Rodriguez, Cara Magnabosco, Longhui Deng, Stefano M. Bernasconi, Hendrik Vogel, Marina Morlock, and Mark A. Lever

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Short summary
Our research explores microbial sulfur cycling in the 13 500-year-old sediment record of a sulfate-rich alpine lake. We present evidence for active sulfur cycling across sediment layers, even in sulfate-depleted zones, driven by uncultivated microorganisms. In addition, rapid organic matter sulfurization could contribute to its preservation. These findings enhance our understanding of the role of sulfur in organic matter preservation and deep biosphere processes.
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