Biogeosciences
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Articles | Volume 22, issue 7
Articles | Volume 22, issue 7
https://doi.org/10.5194/bg-22-1821-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-1821-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 7
Research article
 | 
14 Apr 2025
Research article |  | 14 Apr 2025

Low sensitivity of a heavily calcified coccolithophore under increasing CO2: the case study of Helicosphaera carteri

Stefania Bianco, Manuela Bordiga, Gerald Langer, Patrizia Ziveri, Federica Cerino, Andrea Di Giulio, and Claudia Lupi

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Short summary
This work focuses on the response in culture experiments to increasing CO2 of the coccolithophore species Helicosphaera carteri, a unicellular marine calcifying microalgae. The absence of significant changes in coccolith malformations, along with stable size, shape, and calcification-to-photosynthesis ratio, is indicative of H. carteri low sensitivity to CO2 rise, together with its ability to maintain a stable contribution to the marine rain ratio under future climate changes.
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