Biogeosciences
Biogeosciences
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Articles | Volume 22, issue 21
Articles | Volume 22, issue 21
https://doi.org/10.5194/bg-22-6563-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-6563-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 21
Research article
 | 
06 Nov 2025
Research article |  | 06 Nov 2025

Bacteriohopanepolyols track past environmental transitions in the Black Sea

Anna Cutmore, Nora Richter, Nicole Bale, Stefan Schouten, and Darci Rush

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Short summary
This study uses bacterial compounds, bacteriohopanepolyols (BHPs), preserved in Black Sea sediments to trace major environmental changes over the past 20 000 years. As the basin shifted from a freshwater lake to a permanently oxygen-poor marine environment, we observe clear changes in bacterial communities and environmental conditions. These findings offer new insight into how microbes responded to significant hydrological changes during the last deglaciation and Holocene.
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