Consulta: creatorFacets:"Maignien, Lois"
Registros recuperados: 11
Data/hora: 06/06/2024 13:06:57

Editorial: New Insights into Microbial Ecology through Subtle Nucleotide Variation
Provedor de dados: 5
Autores: Eren, A. Murat; Sogin, Mitchell L.; Maignien, Lois.
Tipo: Text
Palavras-chave: Oligotyping; Minimum entropy decomposition; 16S rRNA gene; Microbial ecology; High resolution.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00601/71310/69739.pdf

Thermococcus piezophilus sp. nov., a novel hyperthermophilic and piezophilic archaeon with a broad pressure range for growth, isolated from a deepest hydrothermal vent at the Mid-Cayman Rise
Provedor de dados: 5
Autores: 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

Influence of dissolved oxygen content on the bacteria‐induced ennoblement of stainless steels in seawater and its consequence on the localized corrosion risk
Provedor de dados: 5
Autores: Trigodet, Florian; Larché, Nicolas; Morrison, Hilary G.; Maignien, Lois; Thierry, Dominique.
The ennoblement of stainless steel (e.g., the increase of open circuit potential [OCP]) is associated with bacterial colonization. This increases the risk of localized corrosion as the critical pitting/crevice potential can be overcome, especially for lower grade stainless steel. In this study, we assessed the influence of dissolved oxygen content (DOC) on the crevice corrosion of duplex and super duplex stainless steels. In addition, we used DNA amplicon sequencing to identify the bacteria most likely associated with the ennoblement. Above approximately 100 parts per billion (ppb) of dissolved oxygen, the ennoblement of OCP was observed leading to an increased risk of localized corrosion. Below approximately 100 ppb of dissolved oxygen, no ennoblement...
Tipo: Text
Palavras-chave: 16S rRNA gene; Electroactive bacteria; Ennoblement; Microbial ecology; Natural seawater; Stainless steel.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00588/70026/67934.pdf

Genome Sequence of the Piezophilic, Mesophilic Sulfate-Reducing Bacterium Desulfovibrio indicus J2(T)
Provedor de dados: 5
Autores: Cao, Junwei; Maignien, Lois; Shao, Zongze; Alain, Karine; Jebbar, Mohamed.
The complete genome sequence of Desulfovibrio indicus J2(T), a member of the family Desulfovibrionaceae, consists of 3,966,573-bp in one contig and encodes 3,461 predicted genes, 5 noncoding RNAs, 3 rRNAs operons, and 52 tRNA-encoding genes. The genome is consistent with a heterotrophic, anaerobic lifestyle including the sulfate reduction pathway.
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00601/71311/69740.pdf

Biodiversity of Cold Seep Ecosystems Along the European Margins
Provedor de dados: 5
Autores: Vanreusel, Ann; Andersen, Ann C.; Boetius, Antje; Connelly, Douglas; Cunha, Marina R.; Decker, Carole; Hilario, Ana; Kormas, Konstantinos Ar.; Maignien, Lois; Olu, Karine; Pachiadaki, Maria; Ritt, Benedicte; Rodrigues, Clara; Sarrazin, Jozee; Tyler, Paul; Van Gaever, Saskia; Vanneste, Heleen.
During the European Commission's Framework Six Programme, HERMES, we investigated three main areas along the European margin, each characterized by the presence of seep-related structures exhibiting different intensity of activity and biological diversity. These areas are: (1) the Nordic margin with the Hakon Mosby mud volcano and many pockmarks, (2) the Gulf of Cadiz, and (3) the eastern Mediterranean with its hundreds of mud volcanoes and brine pool structures. One of the main goals of the HERMES project was to unravel the biodiversity associated with these seep-associated ecosystems, and to understand their driving forces and functions, using an integrated approach. Several multidisciplinary research cruises to these three areas provided evidence of...
Tipo: Text
Palavras-chave: Mosby mud volcano; Gulf of mexico; Cadiz ne atlantic; Deep sea fan; Community structure; Microbial communities; Fluid flow; Mediterranean sea; Carbonate crusts; Norwegian sea.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6375.pdf

Linking Spatial and Temporal Dynamic of Bacterioplankton Communities With Ecological Strategies Across a Coastal Frontal Area
Provedor de dados: 5
Autores: Lemonnier, Clarisse; Perennou, Morgan; Eveillard, Damien; Fernandez-guerra, Antonio; Leynaert, Aude; Marié, Louis; Morrison, Hilary G.; Memery, Laurent; Paillard, Christine; Maignien, Lois.
Ocean frontal systems are widespread hydrological features defining the transition zone between distinct water masses. They are generally of high biological importance as they are often associated with locally enhanced primary production by phytoplankton. However, the composition of bacterial communities in the frontal zone remains poorly understood. In this study, we investigate how a coastal tidal front in Brittany (France) structures the free-living bacterioplankton communities in a spatio-temporal survey across four cruises, five stations and three depths. We used 16S rRNA gene surveys to compare bacterial community structures across 134 seawater samples and defined groups of co-varying taxa (modules) exhibiting coherent ecological patterns across...
Tipo: Text
Palavras-chave: Marine front; Bacterial communities; Dynamic; Network; Ecological strategies.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00634/74657/74557.pdf

Complete Genome Sequence of Hyperthermophilic Archaeon   Thermococcus   sp. EXT12c, Isolated from the East Pacific Rise 9°N
Provedor de dados: 5
Autores: Courtine, Damien; Alain, Karine; Georges, Myriam; Bienvenu, Nadège; Morrison, Hilary G.; Eren, A. Murat; Maignien, Lois.
We report the genome sequence of Thermococcus sp. EXT12c isolated from a deep-sea hydrothermal vent at the East Pacific Rise 9°N. Microbes in the genus Thermococcus are able to grow anaerobically at high temperature, around neutral pH, and some of them under high hydrostatic pressure.
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00415/52652/53509.pdf

Complete Genome Sequence of the Hyperthermophilic and Piezophilic Archeon   Thermococcus piezophilus   CDGS   T   , Able To Grow under Extreme Hydrostatic Pressures
Provedor de dados: 5
Autores: Dalmasso, Cécile; Oger, Philippe; Courtine, Damien; Georges, Myriam; Takai, Ken; Maignien, Lois; Alain, Karine.
We report the genome sequence of Thermococcus superprofundus strain CDGST, a new piezophilic and hyperthermophilic member of the order Thermococcales isolated from the world’s deepest hydrothermal vents, at the Mid-Cayman Rise. The genome is consistent with a heterotrophic, anaerobic, and piezophilic lifestyle.
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00345/45616/45237.pdf

An Assessment of Environmental Metabarcoding Protocols Aiming at Favoring Contemporary Biodiversity in Inventories of Deep-Sea Communities
Provedor de dados: 5
Autores: Brandt, Miriam; Trouche, Blandine; Henry, Nicolas; Liautard-haag, Cathy; Maignien, Lois; De Vargas, Colomban; Wincker, Patrick; Poulain, Julie; Zeppilli, Daniela; Arnaud-haond, Sophie.
The abyssal seafloor covers more than 50% of planet Earth and is a large reservoir of still mostly undescribed biodiversity. It is increasingly targeted by resource-extraction industries and yet is drastically understudied. In such remote and hard-to-access ecosystems, environmental DNA (eDNA) metabarcoding is a useful and efficient tool for studying biodiversity and implementing environmental impact assessments. Yet, eDNA analysis outcomes may be biased toward describing past rather than present communities as sediments contain both contemporary and ancient DNA. Using commercially available kits, we investigated the impacts of five molecular processing methods on eDNA metabarcoding biodiversity inventories targeting prokaryotes (16S), unicellular...
Tipo: Text
Palavras-chave: Environmental metabarcoding; RNA versus DNA; Extracellular DNA; Deep-sea biodiversity; Benthic ecology; Biomonitoring; Method testing.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00630/74165/73774.pdf

Microplastic bacterial communities in the Bay of Brest: Influence of polymer type and size
Provedor de dados: 5
Autores: 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 (&lt;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

Electroactive Bacteria Associated With Stainless Steel Ennoblement in Seawater
Provedor de dados: 5
Autores: Trigodet, Florian; Larche, Nicolas; Morrison, Hilary G.; Jebbar, Mohamed; Thierry, Dominique; Maignien, Lois.
Microorganisms can increase the open-circuit potential of stainless steel immersed in seawater of several hundred millivolts in a phenomenon called ennoblement. It raises the chance of corrosion as the open-circuit potential may go over the pitting corrosion potential. Despite the large impact of the ennoblement, no unifying mechanisms have been described as responsible for the phenomenon. Here we show that the strict electrotroph bacterium "Candidatus Tenderia electrophaga" is detected as an ennoblement biomarker and is only present at temperatures at which we observe ennoblement. This bacterium was previously enriched in biocathode systems. Our results suggest that "Candidatus Tenderia electrophaga," and its previously described extracellular electron...
Tipo: Text
Palavras-chave: Ennoblement; Electroactive bacteria; Stainless steel; Microbial ecology; 16S rRNA gene.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00482/59371/62144.pdf