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	Provedor de dados ArchiMer (3) Autor Belin, Colette (1) Djaoudi, Kahina (1) Ferrier-pages, C (1) Ismaili, Mm (1) Karner, M (1) Lamotte, M (1) Rassoulzadegan, F (1) Texier, H (1) Mais... Palavra-chave Dissolved organic matter (3) Matière organique dissoute (3) Acides aminés (1) Amino acids (1) Atmospheric deposition (1) Bioavailability (1) Biodisponibilité. (1) C:N:P ratios (1) Dépôt atmosphérique (1) English Channel (1) Excretion rates (1) Manche (1) Mediterranean Sea (1) Mer Méditerranée (1) Nutrient (1) Nutrients (1) Nutriment (1) Nutriments (1) Protozoa (1) Protozoaires (1) Mais... Tipo do documento Text (3) Ano 2018 (1) 1998 (2) País France (3) Idioma Francês (2) Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Release of dissolved amino acids by flagellates and ciliates grazing on bacteria ArchiMer Ferrier-pages, C; Karner, M; Rassoulzadegan, F. Release of amino acids was examined in the laboratory in the form of dissolved primary amine (DPA) by two marine planktonic protozoa (the oligotrichous ciliate, Strombidium sulcatum and the aplastidic flagellate Pseudobodo sp.) grazing on bacteria. DPA release rates were high (19-25 x 10(-6) and 1.8-2.3 x 10(-6) mu mol DPA cell(-1) h(-1) for flagellates and ciliates, respectively) during the exponential phase, when the ingestion rates were maximum. Release rates were lower during the other growth phases. The release of DPA accounted for 10 % (flagellates) and 16 % (ciliates) of the total nitrogen ingested. Our data suggest that the release of DPA by protozoa could play an important role in supporting bacterial and consequently autotrophic pico- and... Tipo: Text Palavras-chave: Acides aminés; Protozoaires; Taux d'excrétion; Matière organique dissoute; Amino acids; Protozoa; Excretion rates; Dissolved organic matter. Ano: 1998 URL: http://archimer.ifremer.fr/doc/00326/43670/43200.pdf Distribution et caractérisation par fluorescence de la matière organique dissoute dans les eaux de la Manche centrale ArchiMer Ismaili, Mm; Belin, Colette; Lamotte, M; Texier, H. Intensity and spectral characteristics of the fluorescence of water samples collected along the transect Cherbourg-Isle of Wight during four cruises for excitations at 370, 313 and 270 nm have been investigated within the framework of the FluxManche II program. Seasonal and spatial differences appeared to reflect on the one hand, variations in terrestrial inputs, and on the other hand, waters masses structuring. The observed linear variation of the fluorescence intensity with salinity indicates a gradual dilution of the continental humic material in going from the coasts to the central part of the English Channel. The largest signal was observed for the English coastal waters in agreement with important terrestrial inputs from the Solent river. While the... Tipo: Text Palavras-chave: Spectrofluorimétrie; Matière organique dissoute; Manche; Traceur de masse d'eau; Nutriment; Spectrofluorimetry; Dissolved organic matter; English Channel; Tracer of water mass; Nutrient. Ano: 1998 URL: http://archimer.ifremer.fr/doc/00325/43649/43243.pdf Rôle de l’apport atmosphérique sur les processus de biodégradation et la stoechiométrie de la matière organique dissoute en mer Méditerranée ArchiMer Djaoudi, Kahina. Establishing a link between atmospheric deposition and the dissolved organic matter (DOM) pool in the Mediterranean Sea is currently hampered by: (1) a poor knowledge on the surface dissolved phosphate (P) pool, mainly due to low concentrations of dissolved inorganic phosphate (DIP), (2) a critical lack of data on atmospheric fluxes of organic C, N and P and (3) the lack of information on their bioavailability. This PhD thesis aimed at filling these gaps. (1) Relying upon a sensitive determination of DIP, the coverage of the valid dissolved organic phosphate data was enhanced up to 70%, revealing a vertical pattern in the dissolved phosphate biogeochemistry in surface waters. (2) Atmospheric fluxes of soluble organic C, N and P were quantified and were 59... Tipo: Text Palavras-chave: Dépôt atmosphérique; Matière organique dissoute; Rapports C:N:P; Nutriments; Mer Méditerranée; Biodisponibilité.; Atmospheric deposition; Dissolved organic matter; C:N:P ratios; Nutrients; Mediterranean Sea; Bioavailability. Ano: 2018 URL: https://archimer.ifremer.fr/doc/00677/78944/81332.pdf Registros recuperados: 3 Primeira ... 1 ... Última

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