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Registros recuperados: 14
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Bacterial community structure of the marine diatom Haslea ostrearia ArchiMer
Lepinay, Alexandra; Capiaux, Hervé; Turpin, Vincent; Mondeguer, Florence; Baron, Regis; Lebeau, Thierry.
The marine diatom Haslea ostrearia produces a water-soluble blue-pigment named marennine of economic interest (e.g. in aquaculture for the greening of oysters). Up to date the studies devoted to ecological conditions under which this microalga develops never took into account the bacterial-H. ostrearia relationships. In this study the bacterial community was analysed by PCR-TTGE before and after H. ostrearia isolation cells recovered from 4 localities, to distinguish the relative part of the biotope and the biocenose and eventually to describe the temporal dynamic of the structure of the bacterial community. The bacterial structure of the phycosphere differed strongly from that of the bulk sediment. The similarity between bacteria recovered from the...
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Ano: 2016 URL: http://archimer.ifremer.fr/doc/00342/45365/44861.pdf
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Bacterial community structure of the marine diatom Haslea ostrearia ArchiMer
Lepinay, Alexandra; Capiaux, Herve; Turpin, Vincent; Mondeguer, Florence; Lebeau, Thierry.
Haslea ostrearia produces a water-soluble, blue-green pigment, called marennine, with proven economic benefits (as a bioactive compound used to green oysters, which improves their market value). Incomplete knowledge of the ecological features of this marine diatom complicates its cultivation. More specifically, the ecology of bacteria surrounding H. ostrearia in ponds is what remains unknown. The structure of this bacterial community was previously analyzed by means of PCR-TTGE before and after isolating H. ostrearia cells recovered from 4 localities in order to distinguish the relative parts of the biotope and biocenose and to describe the temporal dynamics of the bacterial community structure at two time scales (2 weeks vs. 9 months). The bacterial...
Tipo: Text Palavras-chave: Biofilm; Ecology; Metabolic fingerprinting; Microalgae; Phycosphere; TTGE.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00326/43737/43344.pdf
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Bilan de l'année 1996 : Cultures d'huîtres en eaux profondes ; Suivi de l'activité physiologique de C. gigas sur le banc de Ronce (mortalités anormales sur le banc de Ronce) ; Valorisation des claires ostréicoles ArchiMer
Goulletquer, Philippe; Le Moine, Olivier; Soletchnik, Patrick; Razet, Daniel; Turpin, Vincent; Robert, Jean-michel; Gras, Paul; Faury, Nicole; Geairon, Philippe; Taillade, Sylvie; Lodato, Marie; Lagarde, Franck.
La contractualisation SRC/IFREMER-URAPC concernait en 1996 trois actions spécifiques : • Expertise pour les cultures d'huîtres en eaux profondes, • Suivi de l'activité physiologique sur le banc de Ronce, • Valorisation des claires ostréicoles - optimisation du processus d'affinage. Le premier thème n'a pu être abordé que via les différentes réunions préparatoires SRC Ré Centre Ouest, Marennes-Oléron et les commissions des cultures marines. Depuis l'accord de la CCM de La Rochelle en date du 11/04/1996, le dossier reste en attente d'un accord budgétaire des différents partenaires. Le second thème concerne le suivi de l'activité physiologique des huîtres creuses sur le banc ostréicole de Ronce-Perquis. La méthodologie est basée sur l'utilisation d'un...
Tipo: Text Palavras-chave: Ostréiculture; Elevage en eaux profondes; Crassostrea gigas; Physilogie; Mortalité; Claire ostréicole; Bassin de Marennes Oléron; Charente-Maritime.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/00102/21316/18936.pdf
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COSELMAR. Compréhension des socio-écosystèmes littoraux et marins pour la prévention et la gestion des risques. Bilan scientifique 2013-2017 ArchiMer
Pardo, Sophie; Hess, Philipp; Simon, Elodie; Barille, Laurent; Geslin, Emmanuelle; Cognie, Bruno; Martin-jezequel, Véronique; Sechet, Véronique; Herrenknecht, Christine; Baron, Regis; Bourseau, Patrick; Amzil, Zouher; Masse, Anthony; Vandanjon, Laurent; Dumay, Justine; Lebeau, Thierry; Turpin, Vincent; Mondeguer, Florence; Petitgas, Pierre; Trouillet, Brice; Mercier, Denis; Guillotreau, Patrice; Guineberteau, Thierry; Mahevas, Stephanie; Schoefs, Franck; Sophie Pardo; Philipp Hess; Pauline Borgniet; Laurent Barillé; Emmanuelle Geslin; Bruno Cognie; Véronique Martin-Jezequel; Véronique Sechet; Christine Herrenknecht; Régis Baron; Patrick Bourseau; Zouher Amzil; Anthony Massé; Laurent Vandanjon; Justine Dumay; Thierry Lebeau; Vincent Turpin; Florence Mondeguer; Pierre Petitgas; Brice Trouillet.
COSELMAR, a 4-year project financed by the Région des Pays de la Loire at 2.1 M€, officially started on the 7th January 2013. The project is coordinated by Philipp Hess (IFREMER) and Sophie Pardo (Université de Nantes-LEMNA) and falls under the Federation for Research Institut Universitaire Mer et Littoral (IUML, FR CNRS 3473)*. COSELMAR has also been approved by the Scientific Council of the MSH Ange Guépin. COSELMAR is a research project uniting 5 research units of IFREMER and 11 laboratories of the Université de Nantes, along with academic partners, and national and international industries. The aim is to achieve a better understanding of the marine and coastal ecosystems and the associated resources. The project will also provide insights into risk...
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Ano: 2017 URL: https://archimer.ifremer.fr/doc/00406/51793/52550.pdf
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Développement de l'outil cartographique du marais salé de Charente Maritime ArchiMer
Le Moine, Olivier; Geairon, Philippe; Hussenot, Jerome; Turpin, Vincent; Goulletquer, Philippe.
Tipo: Text Palavras-chave: Cartographie; Marais salé; Numérisation; Charente Maritime.
Ano: 2002 URL: http://archimer.ifremer.fr/doc/00272/38373/36690.pdf
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Étude des événements physicochimiques et biologiques présidant à la prolifération d'Haslea ostrearia (Simonsen) dans les claires ostréicoles de la région de Marennes-Oléron : implications dans la maîtrise du verdissement ArchiMer
Turpin, Vincent.
La conchyliculture dans les pertuis charentais représente indéniablement l'une des activités économiques les plus importantes. Sur cette zone, ce sont près de 7800 ha qui sont occupés par des concessions ostréicoles, dont 3000 ha de marais littoraux (Prou et Héral, 1998). Ainsi le secteur de Marennes-Oléron représente, avec 25000 tonnes d'huîtres creuses produites en 1996, près de 18 % de la production nationale de ce mollusque, alors que ce secteur représente à lui seul près de 45 % de la commercialisation des huîtres à l'échelon national. (Web Ministère de l'Agriculture et de la Pêche, 1998).
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Ano: 1999 URL: http://archimer.ifremer.fr/doc/00034/14560/11858.pdf
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First insight on interactions between bacteria and the marine diatom Haslea ostrearia : Algal growth and metabolomic fingerprinting ArchiMer
Lepinay, Alexandra; Turpin, Vincent; Mondeguer, Florence; Grandet-marchant, Quentin; Capiaux, Herve; Baron, Regis; Lebeau, Thierry.
A first insight on the interactions between bacteria isolated from monospecific cultures of the marine diatom Haslea ostrearia and this microalgae is described in this work. From 28 bacterial isolates, the maximal growth rate and the maximal cell concentration were on average 58% and 27% higher (max. 67% for isolate B22). Isolates B5, B10 (both Saccharospirillum sp.) and B22 (Rhodobacter sp.) were the most efficient. The geographical origin of H. ostrearia from which bacteria were isolated had no impact on the algal growth performances, and a given bacterial isolate led to the same algal growth irrespective of the geographical origin of H. ostrearia. To explain the results obtained, a comprehensive integrative strategy was conducted that analyzed the...
Tipo: Text Palavras-chave: Bacterial selection; Plant-growth-promoting bacteria; Phycosphere; Metabolomics.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00429/54036/55340.pdf
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First metabolomic approach of the epiphytic bacteria-marine diatom Haslea ostrearia relationships ArchiMer
Mondeguer, Florence; Lepinay, Alexandra; Capiaux, Hervé; Turpin, Vincent; Baron, Regis; Hess, Philipp; Lebeau, Thierry.
The marine diatom Haslea ostrearia [1] produces a water-soluble blue-pigment named marennine [2] of economic interest. But the lack of knowledge of the ecological conditions, under which this microalga develops in its natural ecosystem, more especially bacteria H. ostrearia interactions, prevents any optimization of its culture in well-controlled conditions. The structure of the bacterial community was analyzed by PCR-TTGE before and after the isolation of H. ostrearia cells recovered from 4 localities, to distinguish the relative part of the biotope and the biocenose and eventually to describe the temporal dynamic of the structure of the bacterial community at two time-scales. The differences in genetic fingerprints, more especially high between two H....
Tipo: Text Palavras-chave: Haslea ostrearia; Marine diatom; Co-culture microalgae; Bacterial community; PCR-TTGE; High Resolution Mass Spectrometry; Untargeted metabolomics.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00342/45367/44862.pdf
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How essential are Argo observations to constrain a global ocean data assimilation system? ArchiMer
Turpin, Vincent; Remy, E.; Le Traon, Pierre-yves.
Observing system experiments (OSEs) are carried out over a 1-year period to quantify the impact of Argo observations on the Mercator Ocean 0.25° global ocean analysis and forecasting system. The reference simulation assimilates sea surface temperature (SST), SSALTO/DUACS (Segment Sol multi-missions dALTimetrie, d'orbitographie et de localisation précise/Data unification and Altimeter combination system) altimeter data and Argo and other in situ observations from the Coriolis data center. Two other simulations are carried out where all Argo and half of the Argo data are withheld. Assimilating Argo observations has a significant impact on analyzed and forecast temperature and salinity fields at different depths. Without Argo data assimilation, large errors...
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Ano: 2016 URL: http://archimer.ifremer.fr/doc/00333/44462/44140.pdf
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Les microalgues des claires ostréicoles de la région de Marennes-Oléron : diversité spécififique, biomasse, répartition spation-temporelle. Dynamique des populations microalgales jusqu'au verdissement des bassins en conditions naturelles et provoquées : événements physico-chimiques et biologiques présidant à la prolifération d'Haslea ostrearia Simonsen ArchiMer
Goulletquer, Philippe; Turpin, Vincent.
Les claires ostréicoles représentent près de 3000ha de marais exploités par la conchyliculture dans le seul Département de Charente-Maritime. Plus de 50000 tonnes sont ainsi affinées puis commercialisées à partir de ce bassin de production, représentant 1/3 de la commercialisation française. Les travaux menés en 1997 portent sur une meilleure connaissance écophysiologique des diatomées des claires ostréicoles dont Haslea ostrearia, ainsi qu'à de meilleures estimations des conditions environnementales naturelles (évolution de la qualité d'eau entre 2 remplissages de marais). En particulier, la variabilité et la répartition au sein des claires des populations phytoplanctoniques ainsi que l'évolution dans le temps de celles-ci ont fait l'objet de recherches....
Tipo: Text Palavras-chave: Claires ostréicoles; Verdissement; Biomasse; Haslea ostrearia; Bassin de la Charente.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/00076/18762/16333.pdf
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Limiting nutrients of oyster pond seawater in the Marennes-Oleron region for Haslea ostrearia : applications to the mass production of the diatom in mesocosom experiments ArchiMer
Turpin, Vincent; Robert, Jean-michel; Goulletquer, Philippe.
Bioassays were carried out with the 'blue diatom' Haslea ostrearia Simonsen, which is responsible for oyster greening during the fattening period of Crassostrea gigas Thunberg in oyster ponds. Samples of seawater were taken from two oyster ponds: one without oysters and the other with 20 oysters per m_, maximal density allowed by the French AFNOR norm for 'refinement'. The aims were to clarify the nutrient requirements of this diatom, also to elucidate the eventual influence of C. gigas at this density on the seawater fertility and to envisage the mass production of this diatom by pond fertilization. Examination of cell numeric densities at the end of bioassays allows us to conclude that silicate was the first limiting nutrient, closely followed by...
Tipo: Text Palavras-chave: Marennes Oleron; Oyster ponds; Mesocosm experiment; Bioassay; Haslea ostrearia; Bacillariophyceae; Limiting nutrients; Marennes Oléron; Claires à huîtres; Expérience en mésocosmes; Bioessai; Haslea ostrearia; Bacillariophyceae; Nutriments limitants.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/1999/publication-3096.pdf
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Optimization of diatom Hasleao strearia cultivation in different mediums and nutrients ArchiMer
Arsad, S; Stavrakakis, Christophe; Turpin, Vincent; Rossa, P; Risjani, Y; Sari, L A; Prasetiya, F S; Mouget, J-l.
Hasleaostrearia is a marine diatom that can feed oysters. This study aimed to cultivate H.ostrearia in the following media: seawater (SW), seawater filtered by activated carbon (SW+CA), and drilling water (DW). The three-water media were supplemented with two types of nutrients, Walne-Conway+silica (CS) and ES-1/3 Provasoli (P), leading to a six experiment series. The cultures were grown in 200 mL and 400 mL respectively. The dilution cycle was every 3 - 4 day for 200 mL volume and every 4 - 5 days for the 400 mL volume for 20 - 40 days or until the cultures showed a decrease in growth. The microalgae exhibited a better growth in SW and SW+CA CS, whereas DW showed a diminishing number of cells in both the CS and P medium. The highest value of Emn in the...
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Ano: 2019 URL: https://archimer.ifremer.fr/doc/00484/59552/62535.pdf
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Preliminary metabolomic approach on the bacterial structure community of Haslea ostrearia ArchiMer
Mondeguer, Florence; Lepinay, Alexandra; Capiaux, Hervé; Turpin, Vincent; Lebeau, Thierry.
The marine diatom Haslea ostrearia [1] produces a water-soluble blue-pigment named marennine [2] of economic interest. But the lack of knowledge of the ecological conditions, under which this microalga develops in its natural ecosystem, more especially bacteria H. ostrearia interactions, prevents any optimization of its culture in well-controlled conditions. The structure of the bacterial community was analyzed by PCR-TTGE before and after the isolation of H. ostrearia cells recovered from 4 localities, to distinguish the relative part of the biotope and the biocenose and eventually to describe the temporal dynamic of the structure of the bacterial community at two time-scales. The differences in genetic fingerprints, more especially high between two H....
Tipo: Text Palavras-chave: Haslea ostrearia; Marine diatom; Co-culture microalgae; Bacterial community; TTGE; High Resolution Mass Spectrometry; Untargeted metabolomics.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00342/45368/44863.pdf
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Valorisation des claires ostréicoles - Contrat de Plan IFREMER - Région Poitou-Charentes - Année 1994 ArchiMer
Soletchnik, Patrick; Goulletquer, Philippe; Razet, Daniel; Geairon, Philippe; Le Moine, Olivier; Faury, Nicole; Turpin, Vincent; Hamon, R.; Robert, Jean-michel; Hussenot, Jerome; Brossard, Nicolas.
Cette étude constitue une des trois actions engagées dans le cadre du Contrat de Plan IFREMER - Poitou-Charentes (1994-1998) sous l"intitulé Valorisation des Claires Ostréicoles. Les deux actions complémentaires concernent la compréhension et l'amélioration du verdissement des claires sous la direction du Pr. J.M. Robert de l'Université de Nantes/lSOMER et la production de masse de microalgues afin de stimuler la croissance de mollusques filtreurs sous la direction de Dr. J. Hussenot du CREMA L'Houmeau. Ce programme répond directement à la demande des professionnels afin d'optimiser les conditions d'élevage de l'huître creuse C. gigas en période d'affinage qui à l'heure actuelle, ne permettent pas le contrôle de la qualité finale du produit. L'objectif...
Tipo: Text Palavras-chave: Claires ostréicoles; Affinage; Capacité trophique; Paramètres; Marais expérimental; Culture diatomée; Huître creuse; Crassostrea gigas; Haslea ostrearia.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/00044/15541/12918.pdf
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