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| Masse, Hl. |
| The carbonates associated with the macrofauna of shallow fine sands have been evaluated at six stations located at five different sites on the French Mediterranean coast. The carbonate content of forty species or zoological groups has been estimated. At each station the mean calcimass has been calculated during a year-long cycle, showing the participation of the different zoological groups, mainly molluscs and echinoderms. The comparison of calcimass and associated biomass shows that CaCO3/AFDW ratio fluctuates between 1.6 to 19.3. These values are similar to those obtained in some rocky bottom communities. Calcimass values usually largely exceed biomass ones; therefore the carbon linked to carbonates cannot be excluded from the carbon balance including... |
| Tipo: Text |
Palavras-chave: Carbonates; Macrofaune; Sables fins littoraux tempérés; Carbonates; Macrofauna; Temperate shallow fine sands. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00325/43604/43923.pdf |
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| Masse, Hl. |
| At a time when there is a great deal of talk of the degradation of the coastal environment and of biodiversity being threatened, we felt it would be of interest to sample the macrofauna of five sites at five metres depth in well sorted fine sand at a thirty-year interval (1966-1996), using the same techniques. Four seasonal samplings provided comparative data at each site on the species richness (S), density (N) and biomass (B). The S values are comparable and even on the increase at two stations. Nevertheless, we observed a general tendency towards decline in the relative abundance of the crustacean group. From the quantitative point of view (N and B), the changes observed would appear to result from the impact of clearly identifiable human pressure, such... |
| Tipo: Text |
Palavras-chave: Méditerranée; Macrofaune des sables; Variations; Long-terme; Mediterranean; Sand-macrofauna; Changes; Long-term. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00325/43572/44053.pdf |
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