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| Soletchnik, Patrick; Le Moine, Olivier; Razet, Daniel; Blouin, Frederic; Geairon, Philippe. |
| In the scope of the "Coastal ecology" thematics, the LCPC supervises a study which aims at understanding the causes and mechanisms of the summer mortality of C. Gigas. Different types of analysis conducted on the oyster (quality index, immunology, cell biology, etc.) enable the identification of a one month period preceding the acute mortality episode and during which the animals undergo a stress situation and become weaker. The energy balance (material balance) is close to zero for the most exposed stocks. Studies conducted on the environment included the search for pathogens and contaminants in the water column, the sediment and the animal, as well as the analysis of the hydrological features of the mass of water. The weakening period corresponds to an... |
| Tipo: Text |
Palavras-chave: Hydrologie; Modèle; Contaminant; Sédiment; Colonne d'eau; Bilan énergétique; Crassostrea gigas; Huîtres; Mortalités estivales. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/acte-3391.pdf |
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| Abrantes, F; Moita, Mt. |
| Diatom and coccolithophorid abundance and diatom assemblage composition found in the water column along the Portuguese margin, during upwelling and non-upwelling conditions, are compared to the distribution patterns observed in the recent sediments from the same area. The water column results indicate a one order of magnitude increase in phytoplankton biomass during upwelling conditions (summer), with diatoms being the most important contributors. Coccolithophorids, on the contrary, dominate the phytoplankton in winter (non-upwelling), The comparison of the upwelling and non-upwelling spatial distribution of these phytoplankton groups to their sedimentary record reveals the sediment record as a reflection of the upwelling situation, preserving most of its... |
| Tipo: Text |
Palavras-chave: Upwelling; Portugal; Diatomée; Colonne d'eau; Sédiment; Upwelling; Portugal; Diatom; Water column; Sediment. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00325/43630/43253.pdf |
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