Consulta: creatorFacets:"Marchais, V."
Registros recuperados: 3
Data/hora: 06/06/2024 02:54:20

Coupling experimental and field-based approaches to decipher carbon sources in the shell of the great scallop, Pecten maximus (L.)
Provedor de dados: 5
Autores: Marchais, V.; Richard, J.; Jolivet, A.; Flye-sainte-marie, J.; Thebault, J.; Jean, F.; Richard, P; Paulet, Y. -m.; Clavier, J.; Chauvaud, L.
This research investigated how the carbon isotopic composition of food source (delta C-13(food)) and dissolved inorganic carbon (delta C-13(DIC)) influences the carbon isotopic composition of Pecten maximus shells (delta C-13(shell)) under both experimental and natural conditions. The objectives are to better understand the relationship between P. maximus and its environment, and to specifically distinguish conditions under which calcification is influenced by respired CO2 derived from food sources versus conditions in which calcification uses inorganic carbon from seawater. Laboratory experiment investigated carbon incorporation into shell carbonates by maintaining scallops under conditions where the stable carbon isotopic composition of food sources was...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00284/39485/82772.pdf

Détermination de la qualité du milieu sur l'inactivation des virus en mer - Analyse par biologie moléculaire
Provedor de dados: 5
Autores: Le Guyader, F.; Menard, Dominique; Billaudel, S.; Marchais, V.
Le but de cette étude réalisée dans le cadre du Plan National d'Océanographie Côtière est l'analyse des différents paramètres susceptibles d'interférer dans les processus d'inactivation des virus entériques en milieu marin. La première étape de ce travail consiste dans la détermination de l'influence de paramètres physico-chimiques tels que la salinité, la température ou la luminosité sur le comportemenf des virus entériques en eau de mer artificielle. Les virus sont recherchés simultanément par inoculation sur culture cellulaire et par biologie moléculaire pour les expérimentations réalisées avec le poliovirus de type 1 et par radio-immunologie et biologie moléculaire pour celles réalisées avec le virus de l'hépatite A (VHA). Ce rapport présente les...
Tipo: Text
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00104/21501/19082.pdf

Comparative study of isotopic trends in two coastal ecosystems of North Biscay: A multitrophic spatial gradient approach
Provedor de dados: 5
Autores: Mortillaro, J. M.; Schaal, G.; Grall, Jacques; Nerot, C.; Brind'Amour, Anik; Marchais, V.; Perdriau, M.; Le Bris, H.
In coastal estuarine embayments, retention of water masses due to coastal topography may result in an increased contribution of continental organic matter in food webs. However, in megatidal embayments, the effect of topography can be counterbalanced by the process of tidal mixing. Large amounts of continental organic matter are exported each year by rivers to the oceans. The fate of terrestrial organic matter in food webs of coastal areas and on neighboring coastal benthic communities was therefore evaluated, at multi-trophic levels, from primary producers to primary consumers and predators. Two coastal areas of the French Atlantic coast, differing in the contributions from their watershed, tidal range and aperture degree, were compared using carbon and...
Tipo: Text
Palavras-chave: Bay of Brest; Bay of Vilaine; Benthic; Filter-feeders; Stable isotopes; Organic matter.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00167/27847/26203.pdf