Biogeosciences
Biogeosciences
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Articles | Volume 22, issue 15
Articles | Volume 22, issue 15
https://doi.org/10.5194/bg-22-3821-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-3821-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 15
Research article
 | 
07 Aug 2025
Research article |  | 07 Aug 2025

Lake anoxia, primary production, and algal community shifts in response to rapid climate changes during the Late Glacial

Stan J. Schouten, Noé R. M. M. Schmidhauser, Martin Grosjean, Andrea Lami, Petra Boltshauser-Kaltenrieder, Jacqueline F. N. van Leeuwen, Hendrik Vogel, and Petra Zahajská

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Short summary
Climate warming speeds up lake eutrophication, creating “dead zones” where aquatic life suffocates due to oxygen depletion. The sediments of Amsoldingersee, a Swiss lake, revealed how climate shifts impacted the lake around 10 000–18 000 years ago. (1) Algal composition differed between both cold and warm periods. (2) Nutrient additions from dust controlled algal growth more than temperature. (3) Cold periods with ice cover led to oxygen depletion. (4) Algal communities recovered after anoxic phases.
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