Particulate inorganic carbon pools by coccolithophores in low-oxygen–low-pH waters off the Southeast Pacific margin

Díaz-Rosas, Francisco Javier; Vargas, Cristian Antonio; von Dassow, Peter

doi:https://doi.org/10.5194/bg-22-4405-2025

Articles | Volume 22, issue 17

https://doi.org/10.5194/bg-22-4405-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-22-4405-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 22, issue 17

Research article

|

04 Sep 2025

Research article |

| 04 Sep 2025

Particulate inorganic carbon pools by coccolithophores in low-oxygen–low-pH waters off the Southeast Pacific margin

Francisco Javier Díaz-Rosas, Cristian Antonio Vargas, and Peter von Dassow

Supplement

https://doi.org/10.5194/bg-22-4405-2025-supplement

Data sets

Scanning Electron Microscopy Datasets – Coccospheres and detached coccoliths in waters off the Southeast Pacific margin [Data set] F. Díaz-Rosas et al. https://doi.org/10.5281/zenodo.14048319

Cross-polarized light microscopy images – Coccospheres and detached coccoliths in waters off the Southeast Pacific margin F. Díaz-Rosas et al. https://doi.org/10.5281/zenodo.14708540

Particulate Inorganic Carbon (PIC) and associated coccospheres and detached coccoliths in waters off the Southeast Pacific margin in 2015 [dataset]. PANGAEA F. Díaz-Rosas et al. https://doi.org/10.1594/PANGAEA.975783

Particulate Inorganic Carbon (PIC) and associated coccospheres and detached coccoliths in waters off the Southeast Pacific margin in 2018 [dataset]. PANGAEA F. Díaz-Rosas et al. https://doi.org/10.1594/PANGAEA.975784

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Short summary

Coccolithophores are tiny oceanic algae that produce calcium carbonate, which can help organic matter sink and affect the oxygen levels below. As ocean conditions change, we studied how these algae contribute to carbon transport in a low-oxygen, low-pH region of the Southeast Pacific. Our results show they survive in these challenging conditions, but their impact is lower than in most regions, suggesting that other phytoplankton may play a bigger role in moving organic carbon here.