Biogeosciences
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Articles | Volume 22, issue 9
Articles | Volume 22, issue 9
https://doi.org/10.5194/bg-22-2287-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-2287-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 9
Research article
 | 
15 May 2025
Research article |  | 15 May 2025

Multispecies expression of coccolithophore vital effects with changing CO2 concentrations and pH in the laboratory with insights for reconstructing CO2 levels in geological history

Goulwen Le Guevel, Fabrice Minoletti, Carla Geisen, Gwendoline Duong, Virginia Rojas, and Michaël Hermoso

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Latest update: 29 Oct 2025
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Short summary
This study explores the impact of environmental conditions on the chemistry of coccoliths, calcite minerals produced by marine algae, to better understand past climate changes. By cultivating different species of coccolithophores under various CO2 and pH levels, we have shown that the isotopic composition of certain species varies with CO2 concentration and quantified these variations.
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