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| Meinesz, Alexandre; Belsher, Thomas; Boudouresque, Charles-françois; Lefevre, Jean-robert. |
| A Spot satellite image was processed to assess the suitability of this facility for the cartography of epibenthic populations and bottom types in the Mediterranean sublittoral fringe. The area studied was on the north coast of Porquerolles island (Hyeres, SE France). The treated data were compared with mapping carried out by diving. We show that satellite remote sensing may permit a distinction between certain epibenthic populations and bottom types down to 10 m depth. Thus the usefulness of the satellite is reduced where the sublittoral is steeply shelving, as the mappable area is narrow and represented by only a few pixels, each of which tends to overlap several separate biocoenoses. The image treated was obtained in June under very favourable... |
| Tipo: Text |
Palavras-chave: POSIDONIA-OCEANICA; MAPPING; REMOTE SENSING; SPOT. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00183/29397/27762.pdf |
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| Francour, P. |
| From July 1988 to September 1992, Scuba divers used a non-destructive sampling method to study the fish communities of rocks and Posidonia oceanica seagrass beds, in Scandola Marine Reserve. Sites were established in the integral reserve (protection of the marine environment), in the non-integral reserve (partial protection) and outside the reserve (no protection). Average density and biomass of the sampled population in P. oceanica seagrass beds showed no significant difference between the sites in the integral reserve and the others. Only the integrally-protected shallow and deep water zones showed considerably reduced seasonal variations. For rocky substrata, the integral reserve site demonstrated higher density and biomass than the other sites. The... |
| Tipo: Text |
Palavras-chave: RESERVE EFFECT; ROCKY REEFS; POSIDONIA-OCEANICA; SEAGRASS BEDS; TEMPORAL-ANALYSIS; CORSICA. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00098/20893/18507.pdf |
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