7 documents found, page 1 of 1
High connectivity among Vesicomyid bivalves from cold seeps and deep-sea fans o...
Hassan, Mohamad; Teixeira, Sara; Decker, Carole; Fuchs, Sandra; Mouchel, Olivier; Olu, Karine; Arnaud-Haond, SophieChemosynthetic ecosystems are scattered in the deep ocean, harbouring highly specialized communities, among which the degree of connectivity and dispersal is scarcely studied. This gap is largely due to limited range distribution, either real or due to highly partial exploration, preventing the availability of a sufficient number of samples for population genetic analysis. For the few species that escaped this ...
High connectivity across the fragmented chemosynthetic ecosystems of the deep A...
Teixeira, Sara; Olu, Karine; Decker, C.; Cunha, R. L.; Fuchs, S.; Hourdez, S.; Serrão, Ester; ARNAUD-HAOND, SophieChemosynthetic ecosystems are distributed worldwide in fragmented habitats harbouring seemingly highly specialized communities. Yet, shared taxa have been reported from highly distant chemosynthetic communities. These habitats are distributed in distinct biogeographical regions, one of these being the so-called Atlantic Equatorial Belt (AEB). Here, we combined genetic data (COI) from several taxa to assess the ...
An overview of chemosynthetic symbioses in bivalves from the North Atlantic and...
Duperron, Sebastien; Gaudron, Sylvie Marylene; Rodrigues, Clara Lúcia Ferreira; Cunha, Marina Pais Ribeiro da; Decker, Carole; Olu, KarineDeep-sea bivalves found at hydrothermal vents, cold seeps and organic falls are sustained by chemosynthetic bacteria that ensure part or all of their carbon nutrition. These symbioses are of prime importance for the functioning of the ecosystems. Similar symbioses occur in other bivalve species living in shallow and coastal reduced habitats worldwide. In recent years, several deep-sea species have been investig...
Phylogeny and diversification patterns among vesicomyid bivalves
Decker, Carole; Olu, Karine; Cunha, Regina L.; ARNAUD-HAOND, SophieVesicomyid bivalves are among the most abundant and diverse symbiotic taxa in chemosynthetic-based ecosystems: more than 100 different vesicomyid species have been described so far. In the present study, we investigated the phylogenetic positioning of recently described vesicomyid species from the Gulf of Guinea and their western Atlantic and Pacific counterparts using mitochondrial DNA sequence data. The maxim...
The smaller vesicomyid bivalves in the genus Isorropodon (Bivalvia, Vesicomyida...
Rodrigues, Clara F.; Cunha, Marina R.; Olu, Karine; Duperron, SébastienSpecies of Isorropodon are vesicomyid bivalves for which little information is available regarding host phylogeny and bacterial symbioses. In this study we investigated the symbioses in three Isorropodon species from three cold seep areas: Isorropodon bigoti (Gulf of Guinea), Isorropodon megadesmus (Gulf of Cadiz) and Isorropodon perplexum (Eastern Mediterranean). Analysis of bacterial 16S ribosomal RNA gene se...
Diversity of symbioses between chemosynthetic bacteria and metazoans at the Gui...
Duperron, Sébastien; Rodrigues, Clara F.; Léger, Nelly; Szafranski, Kamil; Decker, Carole; Olu, Karine; Gaudron, Sylvie M.Fauna from deep-sea cold seeps worldwide is dominated by chemosymbiotic metazoans. Recently, investigation of new sites in the Gulf of Guinea yielded numerous new species for which symbiosis was strongly suspected. In this study, symbioses are characterized in five seep-specialist metazoans recently collected from the Guiness site located at ≈ 600 m depth. Four bivalve and one annelid species belonging to famil...
Heterogeneous energetic pathways and carbon sources on deep eastern Mediterrane...
Carlier, Antoine; Ritt, Benedicte; Rodrigues, Clara F.; Sarrazin, Jozee; Olu, Karine; Grall, Jacques; Clavier, JacquesCold seep communities in the Mediterranean Sea have only been discovered two decades ago, and their trophic ecology has been the subject of very few studies. We investigated the benthic food web of two deep chemosynthesis-based ecosystems on the Napoli and Amsterdam mud volcanoes (MVs) in the eastern Mediterranean Sea (similar to 2,000 m depth). Seeping methane has been detected at the surface of both MVs durin...