Ocean Science
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Articles | Volume 21, issue 2
Articles | Volume 21, issue 2
https://doi.org/10.5194/os-21-679-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/os-21-679-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 21, issue 2
Research article
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20 Mar 2025
Research article | Highlight paper |  | 20 Mar 2025

Decadal changes in phytoplankton functional composition in the Eastern English Channel: possible upcoming major effects of climate change

Zéline Hubert, Arnaud P. Louchart, Kévin Robache, Alexandre Epinoux, Clémentine Gallot, Vincent Cornille, Muriel Crouvoisier, Sébastien Monchy, and Luis Felipe Artigas

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Editorial statement
This is an original study on a on a coastal ecosystem, combining environmental data with data on phytoplankton functional groups. Such a time series on flow cytometry in combination with environmental data at high temporal resolution over multiple years is relatively rare and can give a detailed view into the variability of the phytoplankton community over the last decade. This is the first pluri-annual study of the whole size-range of the phytoplankton community characterized by one unique method.
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Short summary
This study provides the first assessment of decadal changes in the whole phytoplankton community, addressed by flow cytometry, in the highly productive waters of the Strait of Dover. A significant surface seawater temperature increase of 1°C, associated with an important change in the nutrient concentration and balance, has triggered a change in the phytoplankton communities, characterized by a higher total abundance and an increasing proportion of the smallest cells (picroeukaryotes and picocyanobacteria).
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