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	Provedor de dados ArchiMer (2) Autor Collos, Yves (2) Pons, Virginie (2) Souchu, Philippe (2) Bec, Béatrice (1) Bibent, Bertrand (1) Descolas Gros, Chantal (1) Fouilland, Eric (1) Gasc, Anne (1) Hoai, Thong Lam (1) Husseini Ratrema, Julie (1) Rougier, Claude (1) Vaquer A, André (1) Vaquer, André (1) Mais... Palavra-chave Ammonium (1) Autotrophy (1) Carboxylase activities (1) Degradation (1) Growth (1) Heterotrophy (1) Nitrogen enrichments (1) Pheopigments (1) Phytoplankton (1) Size fractionated phytoplankton (1) Zooplankton (1) Mais... Tipo do documento Text (2) Ano 2005 (1) 2002 (1) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Pheopigment dynamics, zooplankton grazing rates and the autumnal ammonium peak in a Mediterranean lagoon ArchiMer Collos, Yves; Husseini Ratrema, Julie; Bec, Béatrice; Vaquer, André; Hoai, Thong Lam; Rougier, Claude; Pons, Virginie; Souchu, Philippe. The dilution technique was used to estimate chlorophyll and pheopigment, net and gross production as well as zooplankton grazing over a 12-month period in a coastal lagoon in Southern France. Chlorophyll a (Cha) based gross growth rates of phytoplankton ranged from undetectable in February to 2.6 day(-1) in June, corresponding to 3.8 divisions per day. Cha-based grazing rates ranged from undetectable in February to 1.1 d(-1) in June. The seasonal growth pattern of picoplankton was similar to that of the whole community, with a peak in July, corresponding to four divisions per day. Grazing processes represented from 20 to 150% of the phytoplankton daily growth, and the grazing pressure was stronger on small phytoplankton cells than on larger cells. Gross... Tipo: Text Palavras-chave: Zooplankton; Ammonium; Pheopigments; Degradation; Growth; Phytoplankton. Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-727.pdf Influence of nitrogen enrichment on size-fractionated in vitro carboxylase activities of phytoplankton from Thau Lagoon (Coastal Mediterranean Lagoon, France) ArchiMer Fouilland, Eric; Descolas Gros, Chantal; Collos, Yves; Vaquer A, André; Souchu, Philippe; Gasc, Anne; Bibent, Bertrand; Pons, Virginie. The influence of dissolved inorganic and organic nitrogen (DIN and DON) enrichments on pools of enzymes responsible for CO2 fixation by the Calvin-Benson (Rubisco) and beta-carboxylation pathways (beta-carboxylases) were studied in a natural plankton assemblage. The plankton community from a coastal Mediterranean lagoon were incubated in situ for 24 h with initially ammonium, nitrate and DON (taurine) enrichments and compared to a control without any enrichment. An increase of small picophytoplankton and diatom biomass was observed in the enriched inorganic nitrogen treatments 7 - 10 h after the initial enrichment. Phytoplankton biomass decreased in the control and under taurine enrichment suggesting an inorganic nitrogen limitation of phytoplankton growth. Tipo: Text Palavras-chave: Heterotrophy; Autotrophy; Nitrogen enrichments; Size fractionated phytoplankton; Carboxylase activities. Ano: 2002 URL: http://archimer.ifremer.fr/doc/2002/publication-451.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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