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Bacterivory in the common foraminifer Ammonia tepida: Isotope tracer experiment and the controlling factors
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pascal, P.y.; Dupuy, C; Richard, P; Niquil, N.
The majority of sediment dweller foraminifera are deposit feeders. They use their pseudopodia to gather sediment with associated algae, organic detritus and bacteria. Uptake of bacteria by foraminifera have been observed but rarely quantified. We measured uptake of bacteria by the common foraminifera Ammonia tepida using 15N pre-enriched bacteria as tracers. In intertidal flats, seasonal, tidal and circadian cycles induce strong variations in environmental parameters. Grazing experiments were performed in order to measure effects of abiotic (temperature, salinity and irradiance) and biotic (bacterial and algal abundances) factors on uptake rates of bacteria. In mean conditions, A. tepida grazed 78 pgC ind-1 h-1 during the first eight hours of incubation,...
Tipo: Text
Palavras-chave: Trophoecology; Prey abundance; Mudflat; Grazing; Foraminifera; Environmental factor; Bacteria.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4298.pdf