Biogeosciences
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Articles | Volume 23, issue 13
Articles | Volume 23, issue 13
https://doi.org/10.5194/bg-23-4793-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-4793-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 13
Research article
 | 
10 Jul 2026
Research article |  | 10 Jul 2026

New insights into the primary production and the structure of the phytoplankton community in the South Indian Ocean using size fractionation experiments

Valentin Deteix, Céline Ridame, Céline Dimier, Claire Lo Monaco, Aline Tribollet, and Frédéric Planchon

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Short summary
From in situ measurements, we characterized the size structure of both phytoplankton productivity and phytoplankton chemotaxonomic groups biomass in contrasting biogeochemical areas of the South Indian Ocean. We highlighted pronounced inter- and intra-zonal variability in these size structures. Across the study area, primary production and biomass was mainly driven by medium- and large-sized diatoms, haptophytes and dinoflagellates.
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