Titre :

Effects of turbulence on diatoms of the genus Pseudo-nitzschia spp. and associated bacteria

Auteur(s) :

Maire, Yanis [Auteur]
Schmitt, François [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Kormas, Konstantinos [Auteur]
Vasileiadis, Sotirios [Auteur]
Caruana, Amandine [Auteur]
Unité Physiologie et Toxines des Microalgues Toxiques et Nuisibles [PHYTOX]
Skouroliakou, Dimitra-Ioli [Auteur]
Universiteit Gent = Ghent University = Université de Gand [UGENT]
Université du Littoral Côte d'Opale [ULCO]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Bampouris, Vasileios [Auteur]
Courcot, Lucie [Auteur]
Université du Littoral Côte d'Opale [ULCO]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Hervé, Fabienne [Auteur]
Unité Physiologie et Toxines des Microalgues Toxiques et Nuisibles [PHYTOX]
Crouvoisier, Muriel [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Christaki, Urania [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Université du Littoral Côte d'Opale [ULCO]

Titre de la revue :

FEMS Microbiology Ecology

Éditeur :

Wiley-Blackwell

Date de publication :

2024-08

ISSN :

0168-6496

Mot(s)-clé(s) en anglais :

bacteria
domoic acid
Pseudo-nitzschiafraudulenta
Pseudo-nitzschia multiseries
turbulence

Discipline(s) HAL :

Sciences de l'environnement/Biodiversité et Ecologie
Planète et Univers [physics]/Océan, Atmosphère

Résumé en anglais : [en]

Abstract Turbulence is one of the least investigated environmental factors impacting the ecophysiology of phytoplankton, both at the community and individual species level. Here, we investigated, for the first time, the ...
Lire la suite >Abstract Turbulence is one of the least investigated environmental factors impacting the ecophysiology of phytoplankton, both at the community and individual species level. Here, we investigated, for the first time, the effect of a turbulence gradient (Reynolds number, from Reλ = 0 to Reλ = 360) on two species of the marine diatom Pseudo-nitzschia and their associated bacterial communities under laboratory conditions. Cell abundance, domoic acid (DA) production, chain formation, and Chl a content of P. fraudulenta and P. multiseries were higher for intermediate turbulence (Reλ = 160 or 240). DA was detectable only in P. multiseries samples. These observations were supported by transcriptomic analyses results, which suggested the turbulence related induction of the expression of the DA production locus, with a linkage to an increased photosynthetic activity of the total metatranscriptome. This study also highlighted a higher richness of the bacterial community associated with the nontoxic strain of P. fraudulenta in comparison to the toxic strain of P. multiseries. Bacillus was an important genus in P. multiseries cultures (relative abundance 15.5%) and its highest abundances coincided with the highest DA levels. However, associated bacterial communities of both Pseudo-nitzschia species did not show clear patterns relative to turbulence intensity.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Collections :

• Laboratoire d'Océanologie et de Géosciences (LOG) - UMR 8187

Source :

Harvested from HAL