Titre :

Investigation of Capitella spp. symbionts in the context of varying anthropic pressures: First occurrence of a transient advantageous epibiosis with the giant bacteria Thiomargarita sp. to survive seasonal increases of sulfides in sediments

Auteur(s) :

Hourdez, Stéphane [Auteur]
Laboratoire d'Ecogéochimie des environnements benthiques [LECOB]
Wichlacz, Celine [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 [CIIL]
Jollivet, Didier [Auteur]
Station biologique de Roscoff = Roscoff Marine Station [SBR]
Massol, Francois [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 [CIIL]
Rayol, Maria Claudia [Auteur]
Universidade Federal da Bahia = Federal University of Bahia [UFBA]
Bruno, Renato [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 [CIIL]
Zeppilli, Daniela [Auteur]
Laboratoire Environnement Profond [LEP]
Thomas, Frédéric [Auteur]
Centre de Recherches Ecologiques et Evolutives sur le Cancer [MIVEGEC-CREEC]
Lesven, Ludovic [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Billon, Gabriel [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Duperron, Sébastien [Auteur]
Molécules de Communication et Adaptation des Micro-organismes [MCAM]
Tasiemski, Aurélie [Auteur correspondant]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 [CIIL]

Titre de la revue :

Science of the Total Environment

Pagination :

149149

Éditeur :

Elsevier

Date de publication :

2021-12-01

ISSN :

0048-9697

Mot(s)-clé(s) en anglais :

Chemosynthetic habitat
Eutrophication
Worms
Marine annelids
Coastal
Ectosymbiosis

Discipline(s) HAL :

Sciences du Vivant [q-bio]/Ecologie, Environnement/Interactions entre organismes
Planète et Univers [physics]/Sciences de la Terre/Océanographie
Sciences du Vivant [q-bio]/Biologie animale/Zoologie des invertébrés

Résumé en anglais : [en]

Capitella spp. is considered as an important ecological indicator of eutrophication due to its high densities in organic-rich, reduced, and sometimes polluted coastal ecosystems. We investigated whether such ability to ...
Lire la suite >Capitella spp. is considered as an important ecological indicator of eutrophication due to its high densities in organic-rich, reduced, and sometimes polluted coastal ecosystems. We investigated whether such ability to cope with adverse ecological contexts might be a response to the microorganisms these worms are associated with. In populations from the French Atlantic coast (Roscoff, Brittany), we observed an epibiotic association covering the tegument of 20–30% specimens from an anthropized site while individuals from a reference, non-anthropized site were devoid of any visible epibionts. Using RNAseq, molecular and microscopic analyses, we described and compared the microbial communities associated with the epibiotic versus the non-epibiotic specimens at both locations. Interestingly, data showed that the epibiosis is characterized by sulfur-oxidizing bacteria among which the giant bacterium Thiomargarita sp., to date only described in deep sea habitats. Survey of Capitella combined with the geochemical analysis of their sediment revealed that epibiotic specimens are always found in muds with the highest concentration of sulfides, mostly during the summer. Concomitantly, tolerance tests demonstrated that the acquisition of epibionts increased survival against toxic level of sulfides. Overall, the present data highlight for the first time a peculiar plastic adaptation to seasonal variations of the habitat based on a transcient epibiosis allowing a coastal species to survive temporary harsher conditions.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Collections :

• Centre d'Infection et d'Immunité de Lille (CIIL) - U1019 - UMR 9017

Source :

Harvested from HAL