Article Dans Une Revue Annales de la Société Géologique du Nord Année : 2025

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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hal-05193535 , version 1 (30-07-2025)

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Elsa Breton, Sébastien Monchy, Luen Luen Li, Florence Elias, Lucie Courcot, et al.. Seafoams associated with phaeocystis sp. bloom accumulate saprophytic and parasitic microorganisms from terrestrial origin. Annales de la Société Géologique du Nord, 2025, 32, pp.2668. ⟨10.54563/asgn.2668⟩. ⟨hal-05193535⟩
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