Article (Scientific journals)
Integrated Study of New Faunal Assemblages Dominated by Gastropods at Three Vent Fields Along the Mid-Atlantic Ridge: Diversity, Structure, Composition and Trophic Interactions
Sarrazin, Jozée; Cathalot, Cécile; Laes, Agathe et al.
2022In Frontiers in Marine Science, 9, p. 925419
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Keywords :
diversity; environmental conditions; gastropod; habitat; hydrothermal vent; Mid-Atlantic Ridge; new assemblage; Oceanography; Global and Planetary Change; Aquatic Science; Water Science and Technology; Environmental Science (miscellaneous); Ocean Engineering
Abstract :
[en] To date, two main vent faunal assemblages have been described on active sulfide edifices along the northern Mid-Atlantic Ridge (nMAR): one dominated by bathymodiolin mussels in low temperature areas and the other dominated by alvinocaridid shrimp in warmer habitats. In this study, we describe the ecology of new types of assemblage, dominated by gastropods, that are recurrent in several nMAR vent fields, from ~830 m to 3500 m depth. We assessed and compared the composition, abundance, diversity and trophic niche of these assemblages from three vent fields (Menez Gwen, Lucky Strike and Snake Pit) and characterized their habitats in terms of key environmental conditions. These assemblages, first seen during the Momarsat cruise in 2012 at the Lucky Strike vent field, were investigated during several subsequent cruises. They appear to be widespread along the nMAR, forming two distinct assemblages, one dominated by Lepetodrilus atlanticusat the shallowest vent field Menez Gwen, and the other by Peltospira smaragdina at the other investigated fields. Our data seem to indicate that these gastropods dominate an intermediate habitat at MAR vents and may play an important ecological role in these communities.
Research Center/Unit :
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Environmental sciences & ecology
Aquatic sciences & oceanology
Zoology
Author, co-author :
Sarrazin, Jozée;  Univ Brest, Ifremer, CNRS, Unité BEEP, Plouzané, France
Cathalot, Cécile;  Univ Brest, Ifremer, CNRS, Unité GEOCEAN, Plouzané, France
Laes, Agathe;  Ifremer, Unité RDT, Plouzané, France
Marticorena, Julien;  Univ Brest, Ifremer, CNRS, Unité BEEP, Plouzané, France
Michel, Loïc  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Systématique et diversité animale ; Univ Brest, Ifremer, CNRS, Unité BEEP, Plouzané, France
Matabos, Marjolaine;  Univ Brest, Ifremer, CNRS, Unité BEEP, Plouzané, France
Language :
English
Title :
Integrated Study of New Faunal Assemblages Dominated by Gastropods at Three Vent Fields Along the Mid-Atlantic Ridge: Diversity, Structure, Composition and Trophic Interactions
Publication date :
26 July 2022
Journal title :
Frontiers in Marine Science
eISSN :
2296-7745
Publisher :
Frontiers Media S.A.
Volume :
9
Pages :
925419
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
ANR - Agence Nationale de la Recherche
Funding text :
This work was supported by the “Laboratoire d’Excellence” LabexMER (ANR-10-LABX-19) and co-funded by a grant from the French government under the “Investissements d’Avenir” program. The project is part of the EMSO-Azores regional node within EMSO-France ( http://www.emso-fr.org ) and EMSO ERIC Research Infrastructure ( http://emso.eu/ ). The research program was partly funded by an ANR research grant (ANR Lucky Scales ANR-14-CE02-0008-02).We would like to dedicate this paper to Benoît Pernet-Coudrier, our colleague who passed away in 2016. We thank the captain of the R/Vs Thalassa, L’Atalante and Pourquoi pas? and their crews for their steadfast collaboration in the success of the various cruises. We are particularly grateful to Pierre-Marie Sarradin, Mathilde Cannat, François Lallier and Marie-Anne Cambon, chief scientists of the cruises who greatly supported our sampling program. We are also grateful to the ROV Victor6000 pilots for their patience and constant support. We warmly thank the LEP technical team for its valuable help both at sea and in the lab. Two master students contributed to sorting the fauna: Roxane Augen-Langonne (M1, 2014) and Bruno Labelle (M2, 2015). PhD student L. Van Audenhaege helped with the video editing. The manuscript was professionally edited by Carolyn Engel-Gautier.
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