Global distribution and diversity of marine Parmales

Ban Hiroki, Endo Hisashi, Kuwata Akira, Ogata Hiroshi Y., Berney Cédric, Mahe Frédéric, Henry Nicolas, de Vargas Colomban. 2024. Global distribution and diversity of marine Parmales. Microbes and Environments, 39 (1):ME23093, 11 p.

Url - jeu de données - Entrepôt autre : https://www.genome.jp/ftp/db/community/parmales_diatoms/

Résumé : Parmales (Bolidophyceae) is a minor eukaryotic phytoplankton group, sister to diatoms, which exists as two distinct forms of unicellular organisms: silicified cells and naked flagellates. Since their discovery, many field studies on Parmales have been performed; however, their global distribution has not yet been examined in detail. We herein compiled more than 3,000 marine DNA metabarcoding datasets targeting the V4 region of the 18S rRNA gene from the EukBank database. By linking this large dataset with the latest morphological and genetic information, we provide updated estimates on the diversity and distribution of Parmales in the global ocean at a fine taxonomic resolution. Parmalean amplicon sequence variants (ASVs) were detected in nearly 90% of the samples analyzed. However, the relative abundance of parmaleans in the eukaryotic community was less than 0.2% on average, and the estimated true richness of parmalean ASVs was approximately 316 ASVs, confirming their low abundance and diversity. A phylogenetic ana¬lysis divided these algae into four clades, and three known morphotypes of silicified cells were classified into three different clades. The abundance of Parmales is generally high in the poles and decreases towards the tropics, and individual clades/subclades show further distinctions in their distribution. Collectively, the present results suggest clade/subclade-specific adaptation to different ecological niches.

Mots-clés Agrovoc : Bacillariophyceae, phytoplancton, phylogénie, biogéographie, distribution des populations

Mots-clés libres : Global distribution, Metabarcoding, Ocean, Parmales

Classification Agris : M40 - Écologie aquatique

Champ stratégique Cirad : CTS 1 (2019-) - Biodiversité

Auteurs et affiliations

• Ban Hiroki, Kyoto University (JPN)
• Endo Hisashi, Kyoto University (JPN)
• Kuwata Akira, Fisheries Resources Institute (JPN)
• Ogata Hiroshi Y., Kyoto University (JPN) - auteur correspondant

Contributeurs et affiliations

• Berney Cédric, Sorbonne université (FRA) - collaborateur
• Mahe Frédéric, CIRAD-BIOS-UMR PHIM (FRA) ORCID: 0000-0002-2808-0984 - collaborateur
• Henry Nicolas, Sorbonne université (FRA) - collaborateur
• de Vargas Colomban, Sorbonne université (FRA) - collaborateur

Source : Cirad-Agritrop (https://agritrop.cirad.fr/609607/)

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