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| Cardenas, Paco; Xavier, Joana R.; Reveillaud, Julie; Schander, Christoffer; Rapp, Hans Tore. |
| Background: The Astrophorida (Porifera, Demospongiae(rho)) is geographically and bathymetrically widely distributed. Systema Porifera currently includes five families in this order: Ancorinidae, Calthropellidae, Geodiidae, Pachastrellidae and Thrombidae. To date, molecular phylogenetic studies including Astrophorida species are scarce and offer limited sampling. Phylogenetic relationships within this order are therefore for the most part unknown and hypotheses based on morphology largely untested. Astrophorida taxa have very diverse spicule sets that make them a model of choice to investigate spicule evolution. Methodology/Principal Findings: With a sampling of 153 specimens (9 families, 29 genera, 89 species) covering the deep- and shallow-waters... |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00137/24817/22903.pdf |
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| Dalmasso, Cecile; Oger, Philippe; Selva, Gwendoline; Courtine, Damien; L'Haridon, Stephane; Garlaschelli, Alexandre; Roussel, Erwan; Miyazaki, Junichi; Reveillaud, Julie; Jebbar, Mohamed; Takai, Ken; Maignien, Lois; Alain, Karine. |
| A novel strictly anaerobic, hyperthermophilic archaeon, designated strain CDGST, was isolated from a deep-sea hydrothermal vent in the Cayman Trough at 4964 m water depth. The novel isolate is obligate anaerobe and grows chemoorganoheterotrophically with stimulation of growth by sulphur containing compounds. Its growth is optimal at 75 °C, pH 6.0 and under a pressure of 50 MPa. It possesses the broadest hydrostatic pressure range for growth that has ever been described for a microorganism. Its genomic DNA G + C content is 51.11 mol%. The novel isolate belongs to the genus Thermococcus. Phylogenetic analyses indicated that it is most closely related to Thermococcus barossii DSM17882T based on its 16S rRNA gene sequence, and to ‘Thermococcus onnurineus’ NA1... |
| Tipo: Text |
Palavras-chave: Thermococcus; Piezophile; Hydrothermal vent; Cayman Trough. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00348/45949/45655.pdf |
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| Frere, Laura; Maignien, Lois; Chalopin, Morgane; Huvet, Arnaud; Rinnert, Emmanuel; Morrison, Hilary; Kerninon, Sandrine; Cassone, Anne-laure; Lambert, Christophe; Reveillaud, Julie; Paul-pont, Ika. |
| Microplastics (<5 mm) exhibit intrinsic features such as density, hydrophobic surface, or high surface/volume ratio, that are known to promote microbial colonization and biofilm formation in marine ecosystems. Yet, a relatively low number of studies have investigated the nature of microplastic associated bacterial communities in coastal ecosystems and the potential factors influencing their composition and structure. Here, we characterized microplastics collected in the Bay of Brest by manual sorting followed by Raman spectroscopy and studied their associated bacterial assemblages using 16S amplicon high-throughput sequencing. Our methodology allowed discriminating polymer type (polyethylene, polypropylene and polystyrene) within small size ranges... |
| Tipo: Text |
Palavras-chave: Bacteria; Microplastics; Coastal ecosystem; Metabarcoding; Vibrios. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00449/56082/57614.pdf |
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| Cambon-bonavita, Marie-anne; Aubé, Johanne; Cueff-gauchard, Valerie; Reveillaud, Julie. |
| Background Free-living and symbiotic chemosynthetic microbial communities support primary production and higher trophic levels in deep-sea hydrothermal vents. The shrimp Rimicaris exoculata, which dominates animal communities along the Mid-Atlantic Ridge, houses a complex bacterial community in its enlarged cephalothorax. The dominant bacteria present are from the taxonomic groups Campylobacteria, Desulfobulbia (formerly Deltaproteobacteria), Alphaproteobacteria, Gammaproteobacteria, and some recently discovered iron oxyhydroxide-coated Zetaproteobacteria. This epibiotic consortium uses iron, sulfide, methane, and hydrogen as energy sources. Here, we generated shotgun metagenomes from Rimicaris exoculata cephalothoracic epibiotic communities to reconstruct... |
| Tipo: Text |
Palavras-chave: Niche partitioning; Rimicaris; Metagenome-assembled genomes; Zetaproteobacteria; Holobiont; Hydrothermal vents. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00689/80089/83128.pdf |
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