Type | : | ACL |
---|---|---|
Nature | : | Production scientifique |
Au bénéfice du Laboratoire | : | Oui |
Statut de publication | : | Publié |
Année de publication | : | 2024 |
Auteurs (10) | : | LAGET Manon DRAGO Laetitia PANAIOTIS Thelma KIKO Rainer STEMMANN Lars ROGGE Andreas LLOPIS-MONFERRER Natalia LEYNAERT A IRISSON Jean-olivier BIARD Tristan |
Revue scientifique | : | Nature Communications |
Volume | : | 15 |
Fascicule | : | 1 |
Pages | : | |
DOI | : | 10.1038/s41467-024-47651-4 |
URL | : | https://doi.org/10.1038/s41467-024-47651-4 |
Abstract | : | Thriving in both epipelagic and mesopelagic layers, Rhizaria are biomineralizing protists, mixotrophs or flux-feeders, often reaching gigantic sizes. In situ imaging showed their contribution to oceanic carbon stock, but left their contribution to element cycling unquantified. Here, we compile a global dataset of 167,551 Underwater Vision Profiler 5 Rhizaria images, and apply machine learning models to predict their organic carbon and biogenic silica biomasses in the uppermost 1000 m. We estimate that Rhizaria represent up to 1.7% of mesozooplankton carbon biomass in the top 500 m. Rhizaria biomass, dominated by Phaeodaria, is more than twice as high in the mesopelagic than in the epipelagic layer. Globally, the carbon demand of mesopelagic, flux-feeding Phaeodaria reaches 0.46 Pg C y−1, representing 3.8 to 9.2% of gravitational carbon export. Furthermore, we show that Rhizaria are a unique source of biogenic silica production in the mesopelagic layer, where no other silicifiers are present. Our global census further highlights the importance of Rhizaria for ocean biogeochemistry. |
Mots-clés | : | - |
Commentaire | : | - |
Tags | : | - |
Fichier attaché | : | - |
Citation | : |
Laget M, Drago L, Panaiotis T, Kiko R, Stemmann L, Rogge A, Llopis-Monferrer N, Leynaert A, Irisson J-O, Biard T (2024) Global census of the significance of giant mesopelagic protists to the marine carbon and silicon cycles. Nat Commun 15 | doi: 10.1038/s41467-024-47651-4
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