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	Provedor de dados ArchiMer (2) IBSS Repository (1) Autor Auguet, Jean-christophe (1) Bouvier, Corinne (1) Bouvier, Thierry (1) Fouilland, Eric (1) Got, Patrice (1) Kemp, R. B. (1) Le Floc'H, Emilie (1) Mas, Sebastien (1) Mostajir, Behzad (1) Mukhanov, V. S. (1) Nouguier, Jean (1) Roques, Cecile (1) Sempere, Richard (1) Sime-ngando, Telesphore (1) Troussellier, Marc (1) Vidussi, Francesca (1) Mais... Palavra-chave Bacterioplankton (3) Virioplankton (3) Atherina (1) Autotrophy (1) Bactérioplancton (1) Clonal composition (1) Community structure (1) Composition clonale (1) Crassostrea (1) Diversity (1) Dynamique temporelle (1) Enrichissement vital (1) Estuaire (1) Estuary (1) Extracellular enzyme activity (1) Gradient (1) Gradient de salinité (1) Heat production (1) Heterotrophy (1) Infection lyrique (1) Mais... Tipo do documento Text (2) Journal Contribution (1) Ano 2015 (1) 2005 (2) País France (2) Ukraine (1) Idioma Inglês (2) Francês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Microcalorimetry of the smallest plankton fraction: in search for the sources of heat dissipation IBSS Repository Mukhanov, V. S.; Kemp, R. B.. Heat production by the plankton pico (0.2 to 2 μm) and femto (<0.2 μm) fractions was measured in the dark using a microcalorimetric method. It was surprisingly found that the femtofraction (FF) produced more heat per seawater volume (48 ± 24 (95% CI) μW l-1) than the picofraction (25 ± 14 μW l-1). Consequently, we tested two hypotheses which could explain the phenomenon through a differentiation between the potential sources of heat in FF: (i) metabolism of ultramicrobacteria, the only living component in the fraction besides the non-metabolizing virioplankton which are unable to produce heat; (ii) extracellular chemical processes in aquatic environments. Results of microcalorimetry and respirometry combined with the use of antimicrobial agents... Tipo: Journal Contribution Palavras-chave: Microcalorimetry; Heat production; Ultramicrobacteria; Virioplankton; Bacterioplankton; Extracellular enzyme activity; Микрокалориметрия; Теплопродукция; Ультрамикробактерии; Вириопланктон; Бактериопланктон; Внеклеточная ферментативная активность. Ano: 2005 URL: http://repository.ibss.org.ua/dspace/handle/99011/234 Les virus de l'estuaire de la Charente el du bassin de Marennes-Oleron. Dynamiques spatio-temporelles et interactions avec les communautés bactériennes ArchiMer Auguet, Jean-christophe. This study is divided in two parts; one aim is to evaluate the in situ spalio-temporal dynamics of viral communities in the Charante estuary in order to define the appropriate seasons to conduct in vitro viral enrichment experiments. These experiments, that constitute the second part of this study, were performed to assess the impact of freshwater viruses carried by the Charante River on the dynamics and composition of coastal bacterial communities. With abundance ranging from 1.4 x 107 to 208 x I07 VLPml-1. viruses are the most abundant component among plankton microorganisms in surface waters of the Charente estuary. Thre temporal dynamics of this component reflects the indirect influence of temperature through the control of bacterial abundance,... Tipo: Text Palavras-chave: Richesse spécifique; Composition clonale; Enrichissement vital; Infection lyrique; Structure des communautés; MET; PPGE; Dynamique temporelle; Gradient de salinité; Estuaire; Bactérioplancton; Virioplancton; Species richness; Clonal composition; Viral enrichment; Lytic infection; Community structure; Diversity; TEM; PEGE; Temporal dynamic; Gradient; Salinity; Estuary; Bacterioplankton; Virioplankton. Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/these-3071.pdf Microbial food web structural and functional responses to oyster and fish as top predators ArchiMer Mostajir, Behzad; Roques, Cecile; Bouvier, Corinne; Bouvier, Thierry; Fouilland, Eric; Got, Patrice; Le Floc'H, Emilie; Nouguier, Jean; Mas, Sebastien; Sempere, Richard; Sime-ngando, Telesphore; Troussellier, Marc; Vidussi, Francesca. The impact of fish and oysters on components of the pelagic microbial food web (MFW) was studied in a 10 d mesocosm experiment using Mediterranean coastal waters. Two mesocosms contained natural water only ('Controls'), 2 contained natural water with Crassostrea gigas ('Oyster'), and 2 contained natural water with Atherina spp. ('Fish'). Abundances and biomasses of microorganisms (viruses, bacteria, phytoplankton, heterotrophic flagellates, and ciliates) were measured to estimate their contribution to the total microbial carbon biomass. Two MFW indices, the microbial autotroph: heterotroph C biomass ratio (A:H) structural index and the gross primary production: respiration ratio (GPP:R) functional index, were defined. In the Fish mesocosms, selective... Tipo: Text Palavras-chave: Microbial food web; Virioplankton; Bacterioplankton; Phytoplankton; Protozooplankton; Crassostrea; Atherina; Autotrophy; Heterotrophy. Ano: 2015 URL: https://archimer.ifremer.fr/doc/00284/39489/73675.pdf Registros recuperados: 3 Primeira ... 1 ... Última

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