High and specific diversity of protists in the deep-sea basins dominated by diplonemids, kinetoplastids, ciliates and foraminiferans

Schoenle Alexandra, Hohlfeld Manon, Hermanns Karoline, Mahé Frédéric, de Vargas Colomban, Nitsche Frank, Arndt Hartmut. 2021. High and specific diversity of protists in the deep-sea basins dominated by diplonemids, kinetoplastids, ciliates and foraminiferans. Communications Biology, 4:501, 10 p.

https://doi.org/10.1038/s42003-021-02012-5

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Url - jeu de données - Entrepôt autre : https://www.ncbi.nlm.nih.gov/nuccore/MT355104 / Url - autres données associées : https://github.com/frederic-mahe/swarm/wiki/Fred’s-metabarcoding-pipeline / Url - jeu de données - Entrepôt autre : https://www.ncbi.nlm.nih.gov/bioproject/PRJNA635512/

Quartile : Q1, Sujet : BIOLOGY

Résumé : Heterotrophic protists (unicellular eukaryotes) form a major link from bacteria and algae to higher trophic levels in the sunlit ocean. Their role on the deep seafloor, however, is only fragmentarily understood, despite their potential key function for global carbon cycling. Using the approach of combined DNA metabarcoding and cultivation-based surveys of 11 deep-sea regions, we show that protist communities, mostly overlooked in current deep-sea foodweb models, are highly specific, locally diverse and have little overlap to pelagic communities. Besides traditionally considered foraminiferans, tiny protists including diplonemids, kinetoplastids and ciliates were genetically highly diverse considerably exceeding the diversity of metazoans. Deep-sea protists, including many parasitic species, represent thus one of the most diverse biodiversity compartments of the Earth system, forming an essential link to metazoans.

Mots-clés Agrovoc : biodiversité, organisme hétérotrophe, cycle du carbone, milieu pélagique, Protista, banque de données, sédiment

Mots-clés libres : Biooceanography, Microbial ecology

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