Seafoams associated with phaeocystis sp. bloom accumulate saprophytic and parasitic microorganisms from terrestrial origin
Résumé
The community composition, structure, origin, and trophic functions of eukaryotic microorganisms on seafoam deposits (N = 30) and adjacent seawater (N = 32) were explored at the beach of Wimereux (North of France) during the Phaeocystis globosa spring bloom (March-May 2023), using high throughput sequencing of 18S rRNA marker gene. Our results notably showed that eukaryotic communities trapped in seafoams were different from communities in adjacent seawater. In particular, seafoams were rich in ASVs affiliated to saprobes and parasites compared to seawater, with a terrestrial origin for most of them.
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