Data/hora: 01/06/2024 11:38:59

Provedor de dados: | 5
País: | France
Título: | Les peuplements benthiques du plateau insulaire de la Martinique et des zones bathyales adjacentes. Cas particulier de la malacofaune
Autores: | Paulmier, Gerard; Durand, Francoise.
Data: | 1997
Ano: | 1997
Palavras-chave: | Ecologie; Sédimentologie; Bathymétrie; Peuplements; Benthos; Invertebrés; Communautés; Bivalves; Gastéropodes; Ecology; Sedimentology; Bathymetry; Settelment; Benthos; Invertebrates; Molluscs; Communities; Bivalvia; Gastropoda.
Resumo: | Several oceanographic surveys in Martinique waters with, as main objectives, either geological mapping and evaluating marine aggregate resources of research into deep water carcinologie resources, nafe produced interesting informtion on benthic pppulations situated from the infralittoral to the bathyal shelf, for the wole of faunistic groups and more specifically for the malacofauna. The distribution of the various faunistic group has been analysed in function to the bathymetric, edaphic and possibly, thermic factors. The infralittoral zones, up to the 20 metres isobath, and circalittoral, between 60  and 80 metres, are known to have the richest populations. Corals, sponges, polychaete annelida and molluscs are the best represented, numerically as well as in diversity. Above the insular shelf, at slope level and towards the bathyal zones, faunistic desity decreases except in certain localised areas. The edaphic distribtion shows that the coral reef or those characterised by mixed sediments are the richest as are the loose grounds where the pelite density is relatively high. The highest indexes of abondance are spread over the upper part of the plateau, to the east, and at the entrance to Fort-de-France bay, to the west. Malacofauna distribution which makes a non-negligible contribution to benthic populations, follows the same pattern. Using multivarious analysis, several mollusc communities or gatherings have been identified in function the the three principal environmental factors : bathymetric, edaphic structure and temperature. The gasteropos were more abundant and varied on hard or coarse bottoms and bivalves, notably the soil-dwelling forms, on loose gronds. Diversity is maximal on the various substrata, particularly where they are composed of biodetric elements and heterometric mineral elements. Fairly distinctive communiteis have been found in the shallows and especially in deep water. Shelf communites, characterised by a greater number of ubiquitous forms, have less precise contours. The malacologic fauna of the slope, as far as the insular rise, appeared much poorer, due perhaps to the pronounced incline and a certain substratum instality. .
Tipo: | Text
Idioma: | Francês

Identificador:

https://archimer.ifremer.fr/doc/00480/59191/61880.pdf

https://archimer.ifremer.fr/doc/00480/59191/

Formato: | application/pdf

Fonte:

info:eu-repo/semantics/openAccess

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