Consulta: creatorFacets:"Duperron, Sebastien"
Registros recuperados: 27
Data/hora: 06/06/2024 12:16:56

Estimating Symbiont Abundances and Gill Surface Areas in Specimens of the Hydrothermal Vent Mussel Bathymodiolus puteoserpentis Maintained in Pressure Vessels
Provedor de dados: 5
Autores: Duperron, Sebastien; Quiles, Adrien; Szafranski, Kamil M.; Leger, Nelly; Shillito, Bruce.
The hydrothermal vent mussel Bathymodiolus puteoserpentis hosts gill-associated sulfur- and methane-oxidizing bacteria which sustain host nutrition and allow it to reach high densities at various sites along the northern Mid-Atlantic Ridge. Previous studies have demonstrated that in similar dual symbioses, relative abundances of each bacterial type could change following variations in symbiont substrate availabilities. In this study, pressurized recovery and incubations in pressure vessels were used to test whether B. puteoserpentis symbionts displayed similar behavior in the presence of symbiont substrates. The relative abundances of both types of symbionts were analyzed using fluorescence in situ hybridization (FISH) and group-specific gene copy numbers...
Tipo: Text
Palavras-chave: Symbiosis; In vivo experiments; Pressurized recovery; Bivalve; Mid-Atlantic Ridge.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00484/59533/62525.pdf

Several deep-sea mussels and their associated symbionts are able to live both on wood and on whale falls
Provedor de dados: 5
Autores: Lorion, Julien; Duperron, Sebastien; Gros, Olivier; Cruaud, Corinne; Samadi, Sarah.
Bathymodiolin mussels occur at hydrothermal vents and cold seeps, where they thrive thanks to symbiotic associations with chemotrophic bacteria. Closely related genera Idas and Adipicola are associated with organic falls, ecosystems that have been suggested as potential evolutionary 'stepping stones' in the colonization of deeper and more sulphide-rich environments. Such a scenario should result from specializations to given environments from species with larger ecological niches. This study provides molecular-based evidence for the existence of two mussel species found both on sunken wood and bones. Each species specifically harbours one bacterial phylotype corresponding to thioautotrophic bacteria related to other bathymodiolin symbionts. Phylogenetic...
Tipo: Text
Palavras-chave: Idas; Adipicola; Molecular taxonomy; Organic falls; Symbiosis; Thioautotrophy.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00206/31680/30056.pdf

Microbial diversity associated with the hydrothermal shrimp Rimicaris exoculata gut and occurrence of a resident microbial community
Provedor de dados: 5
Autores: Durand, Lucile; Zbinden, Magali; Cueff-gauchard, Valerie; Duperron, Sebastien; Roussel, Erwan; Shillito, Bruce; Cambon-bonavita, Marie-anne.
Rimicaris exoculata dominates the megafauna of several Mid-Atlantic Ridge hydrothermal sites. Its gut is full of sulphides and iron-oxide particles and harbours microbial communities. Although a trophic symbiosis has been suggested, their role remains unclear. In vivo starvation experiments in pressurized vessels were performed on shrimps from Rainbow and Trans-Atlantic Geotraverse sites in order to expel the transient gut contents. Microbial communities associated with the gut of starved and reference shrimps were compared using 16S rRNA gene libraries and microscopic observations (light, transmission and scanning electron microscopy and FISH analyses). We show that the gut microbiota of shrimps from both sites included mainly Deferribacteres, Mollicutes,...
Tipo: Text
Palavras-chave: Deferribacteres; Midgut epibiosis; Mollicutes; Proteobacteria; Rimicaris exoculata; Starvation experiment.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00000/11142/7919.pdf

A tale of two chitons: is habitat specialisation linked to distinct associated bacterial communities?
Provedor de dados: 5
Autores: Duperron, Sebastien; Pottier, Marie-anne; Leger, Nelly; Gaudron, Sylvie M.; Puillandre, Nicolas; Le Prieur, Stephanie; Sigwart, Julia D.; Ravaux, Juliette; Zbinden, Magali.
Although most chitons (Mollusca: Polyplacophora) are shallow-water molluscs, diverse species also occur in deep-sea habitats. We investigated the feeding strategies of two species, Leptochiton boucheti and Nierstraszella lineata, recovered on sunken wood sampled in the western Pacific, close to the Vanuatu Islands. The two species display distinctly different associations with bacterial partners. Leptochiton boucheti harbours Mollicutes in regions of its gut epithelium and has no abundant bacterium associated with its gill. Nierstraszella lineata displays no dense gut-associated bacteria, but harbours bacterial filaments attached to its gill epithelium, related to the Deltaproteobacteria symbionts found in gills of the wood-eating limpet Pectinodonta sp....
Tipo: Text
Palavras-chave: Sunken wood; Polyplacophora; Symbiosis; Mollicutes; Deltaproteobacteria; Deep-sea ecology.
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00138/24933/23035.pdf

Multi-disciplinary investigation of fluid seepage on an unstable margin: The case of the Central Nile deep sea fan
Provedor de dados: 5
Autores: Bayon, Germain; Loncke, L.; Dupre, Stephanie; Caprais, Jean-claude; Ducassou, E.; Duperron, Sebastien; Etoubleau, Joel; Foucher, Jean-paul; Fouquet, Yves; Gontharet, S.; Henderson, G. M.; Huguen, Caroline; Klaucke, I.; Mascle, J.; Migeon, S.; Olu-le-roy, Karine; Ondreas, Helene; Pierre, C.; Sibuet, Myriam; Stadnitskaia, A.; Woodside, J.
We report on a multidisciplinary study of cold seeps explored in the Central Nile deep-sea fan of the Egyptian margin. Our approach combines in situ seafloor observation, geophysics, sedimentological data, measurement of bottom-water methane anomalies, pore-water and sediment geochemistry, and Th-230/U dating of authigenic carbonates. Two areas were investigated, which correspond to different sedimentary provinces. The lower slope, at similar to 2100 m water depth, indicates deformation of sediments by gravitational processes, exhibiting slope-parallel elongated ridges and seafloor depressions. In contrast, the middle slope, at similar to 1650 m water depth, exhibits a series of debris-flow deposits not remobilized by post-depositional gravity processes....
Tipo: Text
Palavras-chave: Authigenic carbonate; U Th; Cold seep; Continental margin; Nile.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6586.pdf

Evidence for chemoautotrophic symbiosis in a Mediterranean cold seep clam (Bivalvia : Lucinidae): comparative sequence analysis of bacterial 16S rRNA, APS reductase and RubisCO genes
Provedor de dados: 5
Autores: Duperron, Sebastien; Fiala Medioni, Aline; Caprais, Jean-claude; Olu, Karine; Sibuet, Myriam.
Symbioses between lucinid clams (Bivalvia: Lucinidae) and autotrophic sulphide-oxidizing bacteria have mainly been studied in shallow coastal species, and information regarding deep-sea species is scarce. Here we study the symbiosis of a clam, resembling Lucinoma kazani, which was recently collected in sediment cores from new cold-seep sites in the vicinity of the Nile deep-sea fan, eastern Mediterranean, at depths ranging from 507 to 1691 m. A dominant bacterial phylotype, related to the sulphide-oxidizing symbiont of Lucinoma aequizonata, was identified in gill tissue by comparative 16S rRNA gene sequence analysis. A second phylotype, related to spirochete sequences, was identified twice in a library of 94 clones. Comparative analyses of gene sequences...
Tipo: Text
Palavras-chave: Eastern Mediterranean; Cold seeps; Lucinoma; Lucinidae; Sulphide oxidizing bacteria; Symbiosis.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2176.pdf

Microbial utilization of rare earth elements at cold seeps related to aerobic methane oxidation
Provedor de dados: 5
Autores: Bayon, Germain; Lemaitre, Nolwenn; Barrat, Jean-alix; Wang, Xudong; Feng, Dong; Duperron, Sebastien.
A major breakthrough in the field of rare earth element (REE) geochemistry has been the recent discovery of their utility to microbial life, as essential metalloenzymes catalyzing the oxidation of methanol to formaldehyde. Lanthanide-dependent bacteria are thought to be ubiquitous in marine and terrestrial environments, but direct field evidence of preferential microbial utilization of REE in natural systems is still lacking. In this study, we report on the REE and trace element composition of the tube of a siboglinid worm collected at a methane seep in the Gulf of Guinea; a tube-dwelling annelid that thrives in deep-sea chemosynthetic ecosystems. High-resolution trace element profiles along the chitin tube indicate marked enrichments of lanthanum (La) and...
Tipo: Text
Palavras-chave: Tubeworms; Siboglinidae; Lanthanide-dependent bacteria; Metalloenzymes; Methylotrophy; Regab; Authigenic carbonates; Archaean.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00643/75496/76352.pdf

Symbioses bactériennes de bivalves mytilidés associés aux sources de fluides en domaine océanique profond : diversité, rôle nutritionnel et influence de l'environnement
Provedor de dados: 5
Autores: Duperron, Sebastien.
Symbiotic associations between chemosynthetic bacteria and invertebrates are one of the major sources of primary production in deep-sea chemosynthesis-based ecosystems. Mussels of the genus Bathymodiolus (Bivalvia: Mytilidae) occur worldwide and can dominate the animal community at methane-rich cold seeps and sulfide-rich hydrothermal vents. Some species are associated with both sulfide-oxidizing and methanotrophic bacteria. These mussels are thus a good model for studying the diversity, role and ecology of multiple symbiotic associations, which are still poorly understood. For the present study, several species of mytilids were collected from seep and vent sites situated at depths from 850 to 3300 meters using submersibles. Symbiotic bacteria associated...
Tipo: Text
Palavras-chave: Mid Atlantic Ridge Eastern Mediterranean Gulf of Guinea Gulf of Mexico Chemosynthesis Hydrothermal vents Cold seeps Lipid analysis Stable isotopes CFB; 16S rRNA; APS; RubisCO; PmoA Methylotrophic bacteria Methanotrophic bacteria Sulfide oxidizing bacteria Idas Bathymodiolus Symbiosis Chimiosynthèse Sources hydrothermales Sources de fluides froids Analyse lipidique Isotopes stables Ride Médio Atlantique Méditerranée orientale Golfe de Guinée Golfe du Mexique CFB; ARNr 16S; APS; RubisCO; PmoA Bactéries méthylotrophes Bactéries méthanotrophes Bactéries sulfoxydantes Idas Bathymodiolus Symbiose.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/these-2082.pdf

Diversity of symbioses between chemosynthetic bacteria and metazoans at the Guiness cold seep site (Gulf of Guinea, West Africa)
Provedor de dados: 5
Autores: Duperron, Sebastien; Rodrigues, Clara F.; Leger, 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 families previously documented to harbor chemosynthetic bacteria were investigated using bacterial marker gene sequencing, fluorescence in situ hybridization, and stable isotope analyses. Results support that all five species display chemosynthetic, sulfur-oxidizing γ-proteobacteria. Bacteria are abundant in the gills of bivalves, and in the trophosome of...
Tipo: Text
Palavras-chave: Acharax; Calyptogena; Chemosynthesis; Cold seeps; Elenaconcha; Gulf of Guinea; Lamellibrachia; Symbiosis; Thyasira.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00133/24418/22432.pdf

Evolutionary history of Idas sp Med (Bivalvia: Mytilidae), a cold seep mussel bearing multiple symbionts
Provedor de dados: 5
Autores: Lorion, Julien; Halary, Sebastien; Do Nasciment, Joana; Samadi, Sarah; Couloux, Arnaud; Duperron, Sebastien.
Small mytilids of the genus Ildas are related to the large mussels found worldwide at deep-sea hydrothermal vents and cold seeps. They are therefore keys to a better understanding of the colonization of vents and seeps by symbiont-bearing organisms, but still little is known about their biology. For this study, specimens of a mytilid referred to the genus Idas were collected from various substrates in a cold seep area near the Nile deep sea fan. Based on molecular and morphological data, all specimens are confirmed to belong to a single species of the genus Idas, which was previously shown to host six distinct bacterial symbionts. Its larval shell characteristics indicate a long planktonic phase, which could explain its close relationship to a mussel...
Tipo: Text
Palavras-chave: Idas; Planktotrophy; Organic falls; Cold seeps; Symbiosis.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00133/24425/22436.pdf

A dual symbiosis shared by two mussel species, Bathymodiolus azoricus and Bathymodiolus puteoserpentis (Bivalvia : Mytilidae), from hydrothermal vents along the northern Mid-Atlantic Ridge
Provedor de dados: 5
Autores: Duperron, Sebastien; Bergin, C; Zielinski, F; Blazejak, A; Pernthaler, A; Mckiness, Z; Dechaine, E; Cavanaugh, C; Dubilier, Nicole.
Bathymodiolus azoricus and Bathymodiolus puteoserpentis are symbiont-bearing mussels that dominate hydrothermal vent sites along the northern Mid-Atlantic Ridge (MAR). Both species live in symbiosis with two physiologically and phylogenetically distinct Gammaproteobacteria: a sulfur-oxidizing chemoautotroph and a methane-oxidizer. A detailed analysis of mussels collected from four MAR vent sites (Menez Gwen, Lucky Strike, Rainbow, and Logatchev) using comparative 16S rRNA sequence analysis and fluorescence in situ hybridization (FISH) showed that the two mussel species share highly similar to identical symbiont phylotypes. FISH observations of symbiont distribution and relative abundances showed no obvious differences between the two host species. In...
Tipo: Text
Palavras-chave: Bacteria; Phylogeny; Fluorescence in situ hybridization (FISH); Methane oxidizer; Sulfur oxidizer; 16S rRNA; Endosymbiosis.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1864.pdf

Sulphur-oxidizing extracellular bacteria in the gills of Mytilidae associated with wood falls
Provedor de dados: 5
Autores: Duperron, Sebastien; Laurent, Melina Cz; Gaill, Francoise; Gros, Olivier.
Six morphotypes of small mussels (Bivalvia: Mytilidae) were found attached to naturally sunken wood collected in the Bohol Sea (Philippines). These specimens are related to the large Bathymodiolus mussels that are found worldwide at cold seeps and hydrothermal vents. In these habitats, the mytilids harbour sulphur- and methane-oxidizing endosymbionts in their gills and depend on the energy and carbon provided by the symbionts. In this study, bacteria associated with the gills of wood-associated mussels are characterized using molecular and microscopic techniques. The existence of bacteria in the lateral zone of gill filaments in all specimens is demonstrated. Comparative analyses of 16S rRNA gene and adenosine 5'-phosphosulphate (APS) reductase gene...
Tipo: Text
Palavras-chave: Sulphur-oxidizing bacteria; Bathymodiolus; Idas; Adipicola; Sunken woods; Bohol sea.
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00466/57808/60093.pdf

Integrative study of a new cold-seep mussel (Mollusca: Bivalvia) associated with chemosynthetic symbionts in the Marmara Sea
Provedor de dados: 5
Autores: Ritt, Benedicte; Duperron, Sebastien; Lorion, Julien; Lazar, Cassandre; Sarrazin, Jozee.
Recently, small Idas-like mussels have been discovered living on carbonate crusts associated with cold-seeps in the Marmara Sea. These mussels, here referred to as Idas-like nov. sp., differ morphologically and genetically from another species identified as Idas aff. modiolaeformis, living in the same type of ecosystem in the Nile Deep-Sea Fan (eastern Mediterranean Sea). A phylogenetic analysis confirms the distinction between the two species, which belong to highly divergent lineages. Carbon stable isotope values, as well as the detection of thiotroph-related bacteria in the gill tissue, support the presence of a symbiotic, thiotroph-derived nutrition. In contrast, Idas aff. modiolaeformis displays six different types of symbionts. Finally our...
Tipo: Text
Palavras-chave: Mytilidae; Idas-like; Cold-seeps; Marmara Sea; Phylogeny; Symbiosis; Stable isotopes.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00098/20915/19672.pdf

Unexpected co-occurrence of six bacterial symbionts in the gills of the cold seep mussel Idas sp (Bivalvia : Mytilidae)
Provedor de dados: 5
Autores: Duperron, Sebastien; Halary, S; Lorion, J; Sibuet, Myriam; Gaill, F.
Bathymodioline mussels occur in chemosynthesis-based ecosystems such as cold seeps, hydrothermal vents and organic debris worldwide. Their key adaptation to these environments is their association with bacterial endosymbionts which ensure a chemosynthetic primary production based on the oxidation of reduced compounds such as methane and sulfide. We herein report a multiple symbiosis involving six distinct bacterial 16S rRNA phylotypes, including two belonging to groups not yet reported as symbionts in mytilids, in a small Idas mussel found on carbonate crusts in a cold seep area located north to the Nile deep-sea fan (Eastern Mediterranean). Symbionts co-occur within hosts bacteriocytes based on fluorescence in situ hybridizations, and sequencing of...
Tipo: Text
Palavras-chave: Eastern Mediterranean; Cold seeps; Bathymodiolus; Idas; Mytilidae; Symbiosis.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3928.pdf

Physical Proximity May Promote Lateral Acquisition of Bacterial Symbionts in Vesicomyid Clams
Provedor de dados: 5
Autores: Decker, Carole; Olu, Karine; Arnaud-haond, Sophie; Duperron, Sebastien.
Vesicomyid clams harbor intracellular sulfur-oxidizing bacteria that are predominantly maternally inherited and co-speciate with their hosts. Genome recombination and the occurrence of non-parental strains were recently demonstrated in symbionts. However, mechanisms favoring such events remain to be identified. In this study, we investigated symbionts in two phylogenetically distant vesicomyid species, Christineconcha regab and Laubiericoncha chuni, which sometimes co-occur at a cold-seep site in the Gulf of Guinea. We showed that each of the two species harbored a single dominant bacterial symbiont strain. However, for both vesicomyid species, the symbiont from the other species was occasionally detected in the gills using fluorescence in situ...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00153/26427/24527.pdf

Dual symbiosis in a Bathymodiolus sp mussel from a methane seep on the gabon continental margin (southeast Atlantic): 16S rRNA phylogeny and distribution of the symbionts in gills
Provedor de dados: 5
Autores: Duperron, Sebastien; Nadalig, Thierry; Caprais, Jean-claude; Sibuet, Myriam; Fiala Medioni, Aline; Amann, Rudolf; Dubilier, Nicole.
Deep-sea mussels of the genus Bathymodiolus (Bivalvia: Mytilidae) harbor symbiotic bacteria in their gills and are among the dominant invertebrate species at cold seeps and hydrothermal vents. An undescribed Bathymodiolus species was collected at a depth of 3,150 m in a newly discovered cold seep area on the southeast Atlantic margin, close to the Zaire channel. Transmission electron microscopy, comparative 16S rRNA analysis, and fluorescence in situ hybridization indicated that this Bathymodiolus sp. lives in a dual symbiosis with sulfide- and methane-oxidizing bacteria. A distinct distribution pattern of the symbiotic bacteria in the gill epithelium was observed, with the thiotrophic symbiont dominating the apical region and the methanotrophic symbiont...
Tipo: Text
Palavras-chave: Gabon; Southeast Atlantic; Methane seep; Hydrothermal vent; Deep sea; RRNA analysis; Methane concentration; Gill epithelium; Symbiosis; Bacteria; Mytilidae.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-1266.pdf

An overview of chemosynthetic symbioses in bivalves from the North Atlantic and Mediterranean Sea
Provedor de dados: 5
Autores: Duperron, Sebastien; Gaudron, Sylvie M.; Rodrigues, Clara; Cunha, Marina R.; Decker, Carole; Olu, Karine.
Deep-sea bivalves found at hydrothermal vents, cold seeps and organic falls are sustained by chemosynthetic bacteria which 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 investigated from continental margins around Europe, West Africa, East America, the Gulf of Mexico, and from hydrothermal vents on the Mid-Atlantic Ridge. In parallel, numerous more easily accessible shallow marine species were studied. We here provide a summary of the current knowledge available on chemosymbiotic bivalves in the area ranging west-to-east...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00133/24417/22431.pdf

Low-diversity bacterial microbiota in Southern Ocean representatives of lanternfish genera Electrona, Protomyctophum and Gymnoscopelus (family Myctophidae)
Provedor de dados: 5
Autores: Gallet, Alison; Koubbi, Philippe; Léger, Nelly; Scheifler, Mathilde; Ruiz-rodriguez, Magdalena; Suzuki, Marcelino T.; Desdevises, Yves; Duperron, Sebastien.
Myctophids are among the most abundant mesopelagic teleost fishes worldwide. They are dominant in the Southern Ocean, an extreme environment where they are important both as consumers of zooplankton as well as food items for larger predators. Various studies have investigated myctophids diet, but no data is yet available regarding their associated microbiota, despite that the significance of bacterial communities to fish health and adaptation is increasingly acknowledged. In order to document microbiota in key fish groups from the Southern Ocean, the bacterial communities associated with the gut, fin, gills and light organs of members of six species within the three myctophid genera Electrona, Protomyctophum and Gymnoscopelus were characterized using a 16S...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00598/70973/69202.pdf

High rates of apoptosis visualized in the symbiont-bearing gills of deep-sea Bathymodiolus mussels
Provedor de dados: 5
Autores: Piquet, Berenice; Shillito, Bruce; Lallier, Francois H.; Duperron, Sebastien; Andersen, Ann C.
Symbiosis between Bathymodiolus and Gammaproteobacteria allows these deep-sea mussels to live in toxic environments such as hydrothermal vents and cold seeps. The quantity of endosymbionts within the gill-bacteriocytes appears to vary according to the hosts environment; however, the mechanisms of endosymbiont population size regulation remain obscure. We investigated the possibility of a control of endosymbiont density by apoptosis, a programmed cell death, in three mussel species. Fluorometric TUNEL and active Caspase-3-targeting antibodies were used to visualize and quantify apoptotic cells in mussel gills. To control for potential artefacts due to depressurization upon specimen recovery from the deep-sea, the apoptotic rates between mussels recovered...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00484/59526/62500.pdf

Diversity and distribution of methane-oxidizing microbial communities associated with different faunal assemblages in a giant pockmark of the Gabon continental margin
Provedor de dados: 5
Autores: Cambon-bonavita, Marie-anne; Nadalig, Thierry; Roussel, Erwan; Delage, Eloise; Duperron, Sebastien; Caprais, Jean-claude; Boetius, A.; Sibuet, Myriam.
A giant 800-m-diameter pockmark named REGAB was discovered on the Gabon continental margin actively emitting methane at a water depth of 3200 m. The microbial diversity in sediments from four different assemblages of chemosynthetic organisms, Mytilidae, Vesicomyidae, Sibogliniclae and a bacterial mat, was investigated using comparative 16S rRNA gene sequence analysis. Aggregates of anaerobic methanotrophic archaea (ANME-2) and bacteria of the Desulfosarcina/Desulfococcus cluster were found in all four chemosynthetic habitats. Fluorescence in situ hybridization targeting the ANME-2/Desulfosarcina/Desulfococcus aggregates showed their presence few centimeters (3-5cm) below the surface of sediment. 16S rRNA gene sequences from all known marine ANME groups...
Tipo: Text
Palavras-chave: Microbial phylogeny; Faunal assemblage; Cold seep; Chemosynthetic ecosystems; AOM; REGAB.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/2009/publication-7298.pdf

A Mussel's Life Around Deep-Sea Hydrothermal Vents
Provedor de dados: 5
Autores: Duperron, Sebastien; Gaudron, Sylvie M.; Laming, Sven.
Hydrothermal vents are places where seawater exits cracks in the sea floor, having been super-heated and enriched with metals and minerals deep in the underlying bedrock. They are an example of an ecosystem based on chemosynthesis, where life is sustained by energy from chemicals rather than energy from sunlight. The discovery of an abundance of life around deep-sea hydrothermal vents emitting hot and toxic fluids demonstrated that animals and other organisms could thrive in the dark, cold and high-pressure deep oceans. Mussels are among the most studied animals found near hydrothermal vents. Scientists discovered that mussels rely on a close, living relationship—a “symbiosis”—with bacteria for their nutrition. In this symbiosis, bacteria use chemicals...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00500/61188/64718.pdf

Blow Your Nose, Shrimp! Unexpectedly Dense Bacterial Communities Occur on the Antennae and Antennules of Hydrothermal Vent Shrimp
Provedor de dados: 5
Autores: Zbinden, Magali; Gallet, Alison; Szafranski, Kamil M.; Machon, Julia; Ravaux, Juliette; Leger, Nelly; Duperron, Sebastien.
In crustaceans, as in other animals, perception of environmental cues is of key importance for a wide range of interactions with the environment and congeners. Chemoreception involves mainly the antennae and antennules, which carry sensilla that detect water-borne chemicals. The functional importance of these as exchange surfaces in the shrimp's sensory perception requires them to remain free of any microorganism and deposit that could impair the fixation of odorant molecules on sensory neurons. We report here the occurrence of an unexpected dense bacterial colonization on surface of the antennae and antennules of four hydrothermal vent shrimp species. Microscopic observation, qPCR and 16S rRNA barcoding reveal the abundance, diversity and taxonomic...
Tipo: Text
Palavras-chave: Hydrothermal; Shrimp; Alvinocarididae; Chemosensory perception; Antennules; Bacteria; Grooming.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00484/59527/62507.pdf

Bacterial communities associated with the wood-feeding gastropod Pectinodonta sp (Patellogastropoda, Mollusca)
Provedor de dados: 5
Autores: Zbinden, Magali; Pailleret, Marie; Ravaux, Juliette; Gaudron, Sylvie M.; Hoyoux, Caroline; Lambourdiere, Josie; Waren, Anders; Lorion, Julien; Halary, Sebastien; Duperron, Sebastien.
Even though their occurrence was reported a long time ago, sunken wood ecosystems at the deep-sea floor have only recently received specific attention. Accumulations of wood fragments in the deep sea create niches for a diverse fauna, but the significance of the wood itself as a food source remains to be evaluated. Pectinodonta sp. is a patellogastropod that exclusively occurs on woody substrates, where individuals excavate deep depressions, and is thus a potential candidate for a wood-eating lifestyle. Several approaches were used on Pectinodonta sampled close to Tongoa island (Vanuatu) to investigate its dietary habits. Host carbon is most likely derived from the wood material based on stable isotopes analyses, and high cellulase activity was measured in...
Tipo: Text
Palavras-chave: Sunken woods; Wood-feeding gastropod; Symbiosis; Cellulolytic activity.
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00206/31687/30070.pdf

A microbiological and biogeochemical investigation of the cold seep tubeworm Escarpia southwardae (Annelida: Siboglinidae): Symbiosis and trace element composition of the tube
Provedor de dados: 5
Autores: Duperron, Sebastien; Gaudron, Sylvie M.; Lemaitre, Nolwenn; Bayon, Germain.
Tubeworms within the annelid family Siboglinidae rely on sulfur-oxidizing autotrophic bacterial symbionts for their nutrition, and are among the dominant metazoans occurring at deep-sea hydrocarbon seeps. Contrary to their relatives from hydrothermal vents, sulfide uptake for symbionts occurs within the anoxic subsurface sediment, in the posterior ‘root’ region of the animal. This study reports on an integrated microbiological and geochemical investigation of the cold seep tubeworm Escarpia southwardae collected at the Regab pockmark (Gulf of Guinea). Our aim was to further constrain the links between the animal and its symbiotic bacteria, and their environment. We show that E. southwardae harbors abundant sulfur-oxidizing bacterial symbionts in its...
Tipo: Text
Palavras-chave: Sulfur-oxidizing bacteria; RTCA; Trace elements; RubisCO; Symbiosis.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00191/30251/28683.pdf

sFDvent: A global trait database for deep‐sea hydrothermal‐vent fauna
Provedor de dados: 5
Autores: Chapman, Abbie S. A.; Beaulieu, Stace E.; Colaço, Ana; Gebruk, Andrey V.; Hilario, Ana; Kihara, Terue C.; Ramirez‐llodra, Eva; Sarrazin, Jozee; Tunnicliffe, Verena; Amon, Diva J.; Baker, Maria C.; Boschen‐rose, Rachel E.; Chen, Chong; Cooper, Isabelle J.; Copley, Jonathan T.; Corbari, Laure; Cordes, Erik E.; Cuvelier, Daphne; Duperron, Sebastien; Du Preez, Cherisse; Gollner, Sabine; Horton, Tammy; Hourdez, Stéphane; Krylova, Elena M.; Linse, Katrin; Lokabharathi, P. A.; Marsh, Leigh; Matabos, Marjolaine; Mills, Susan Wier; Mullineaux, Lauren S.; Rapp, Hans Tore; Reid, William D. K.; Rybakova (goroslavskaya), Elena; A. Thomas, Tresa Remya; Southgate, Samuel James; Stöhr, Sabine; Turner, Phillip J.; Watanabe, Hiromi Kayama; Yasuhara, Moriaki; Bates, Amanda E.; Padolfi, John.
Motivation Traits are increasingly being used to quantify global biodiversity patterns, with trait databases growing in size and number, across diverse taxa. Despite growing interest in a trait-based approach to the biodiversity of the deep sea, where the impacts of human activities (including seabed mining) accelerate, there is no single repository for species traits for deep-sea chemosynthesis-based ecosystems, including hydrothermal vents. Using an international, collaborative approach, we have compiled the first global-scale trait database for deep-sea hydrothermal-vent fauna - sFDvent (sDiv-funded trait database for the Functional Diversity of vents). We formed a funded working group to select traits appropriate to: (a) capture the performance of vent...
Tipo: Text
Palavras-chave: Biodiversity; Collaboration; Conservation; Cross-ecosystem; Database; Deep sea; Functional trait; Global-scale; Hydrothermal vent; SFDvent.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00509/62033/66160.pdf

Lifecycle Ecology of Deep-Sea Chemosymbiotic Mussels: A Review
Provedor de dados: 5
Autores: Laming, Sven; Gaudron, Sylvie M.; Duperron, Sebastien.
Mussels within the subfamily Bathymodiolinae, in particular the larger Bathymodiolus species (sensu lato) thriving at cold seeps and hydrothermal vents, are among the most iconic fauna to colonize deep-sea reducing habitats globally. Fuelled by energy derived from chemosynthetic symbioses, their contribution to ecosystem productivity is conspicuous, with many bathymodioline species forming dense, extensive aggregates. Chemosymbiotic mussels play crucial roles as ecosystem engineers, both through the formation of spatially heterogeneous biogenic reefs and in redistributing reduced-fluid emissions. The notable absence of Bathymodiolinae outside of reducing ecosystems affirms their dependency on these ephemeral habitats, placing spatiotemporal constraints on...
Tipo: Text
Palavras-chave: Ontogeny; Bathymodiolinae; Nutrition; Development; Larvae; Symbiosis; Reducing habitats.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00477/58915/61478.pdf

Colonization of plant substrates at hydrothermal vents and cold seeps in the northeast Atlantic and Mediterranean and occurrence of symbiont-related bacteria
Provedor de dados: 5
Autores: Szafranski, Kamil M.; Deschamps, Philippe; Cunha, Marina R.; Gaudron, Sylvie M.; Duperron, Sebastien.
Reducing conditions with elevated sulfide and methane concentrations in ecosystems such as hydrothermal vents, cold seeps or organic falls, are suitable for chemosynthetic primary production. Understanding processes driving bacterial diversity, colonization and dispersal is of prime importance for deep-sea microbial ecology. This study provides a detailed characterization of bacterial assemblages colonizing plant-derived substrates using a standardized approach over a geographic area spanning the North-East Atlantic and Mediterranean. Wood and alfalfa substrates in colonization devices were deployed for different periods at 8 deep-sea chemosynthesis-based sites in four distinct geographic areas. Pyrosequencing of a fragment of the 16S rRNA-encoding gene...
Tipo: Text
Palavras-chave: Cold seeps; Colonization; Deep-sea; Symbiont; Hydrothermal vents; Wood falls.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00382/49383/49804.pdf