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| Mostajir, B; Bustillos-guzman, J; Claustre, H; Rassoulzadegan, F. |
| The egestion of particulate material as well as pigment degradation during microzooplankton grazing on phytoplankton are poorly known processes. In an attempt to evaluate these processes, changes in pigment concentrations within various size fractions were monitored in batch cultures of an assemblage of a pelagic ciliate (Strombidium sulcatum) and a heterotrophic flagellate (Paraphysomonas sp.) feeding on a cyanobacterium (Synechococcus sp.) over a 10-day period. Chlorophyll a, carotenoids and phaeopigments were not found in the 0.1-0.7 mu m fraction while the pigments originally in the 0.7-3.0 mu m fraction (prey) were transferred into the > 3.0 mu m size fraction (predator). During this transfer, the carotenoids (zeaxanthin and B-carotene) were not... |
| Tipo: Text |
Palavras-chave: Pigment; Phéopigment; Broutage; Protozoaire; HPLC; Pigment; Phaeopigment; Grazing; Protozoa; HPLC. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00325/43660/43209.pdf |
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| Cailliau, C; Claustre, H; Giannino, S. |
| An analysis of chlorophyll alpha and of taxon-specific pigments, as measured by High Performance Liquid Chromatography (HPLC), revealed the abundance, composition and fate of phytoplankton in the Indian sector of the Southern Ocean, during the late austral summer of 1994 (ANTARES 2 cruise). In the study area (49 degrees S-67 degrees S, 62 degrees E), four different sub-systems are presented from south to north: the Coastal and Continental Shelf Zone (CCSZ), the Seasonal Ice Zone (SIZ), including the Antarctic Divergence (AD), the Permanent Open Ocean Zone (POOZ) and a frontal system, the Polar Frontal Zone (PFZ). The phytoplankton biomass was low everywhere, never exceeding 0.45 mg Chl alpha m(-3). The highest biomass was found in the CCSZ, in the AD and... |
| Tipo: Text |
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| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00093/20430/18097.pdf |
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