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

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

doi:https://doi.org/10.5194/bg-22-3821-2025

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

Supplement

https://doi.org/10.5194/bg-22-3821-2025-supplement

Data sets

XRF measurements of Amsoldingersee sediment core, Switzerland Stan Jonah Schouten et al. https://doi.org/10.1594/PANGAEA.975263

Hyperspectral measurements of Amsoldingersee sediment core, Switzerland Stan Jonah Schouten et al. https://doi.org/10.1594/PANGAEA.975261

Pigments, sequential extraction, and CNS measurements of Amsoldingersee sediment core, Switzerland Stan Jonah Schouten et al. https://doi.org/10.1594/PANGAEA.975327

Multiproxyplotter Stan Jonah Schouten https://github.com/SJSchouten/multiproxyplotter

RDA Stan Jonah Schouten https://github.com/SJSchouten/RDA

RoC Stan Jonah Schouten https://github.com/SJSchouten/RoC

Pigment_Heatmaps Stan Jonah Schouten https://github.com/SJSchouten/Pigment_Heatmaps

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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.