Articles | Volume 22, issue 10
https://doi.org/10.5194/bg-22-2309-2025
https://doi.org/10.5194/bg-22-2309-2025
Research article
 | 
19 May 2025
Research article |  | 19 May 2025

The bacteria–protist link as a main route of dissolved organic matter across contrasting productivity areas on the Patagonian Shelf

M. Celeste López-Abbate, John E. Garzón-Cardona, Ricardo Silva, Juan-Carlos Molinero, Laura A. Ruiz-Etcheverry, Ana M. Martínez, Azul S. Gilabert, and Rubén J. Lara

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Latest update: 09 Aug 2025
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Short summary
This study explores how microbial dynamics influence the dissolved organic matter (DOM) pool in the Patagonian Shelf. Despite high phytoplankton biomass, selective grazing on fast-growing bacteria led to DOM accumulation, likely due to reduced DOM-consuming bacteria and added egestion compounds. Experiments showed that bacteria not only acted as a carbon sink through mineralization but also transferred assimilated carbon dioxide (CO2) to higher trophic levels.
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