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Les peuplements benthiques d’un étang littoral Languedocien, l’étang du Prévost (Hérault): 2. Étude quantitative de la macrofaune des sables
Guelorget, O.; Michel, P. (1979). Les peuplements benthiques d’un étang littoral Languedocien, l’étang du Prévost (Hérault): 2. Étude quantitative de la macrofaune des sables. Téthys 9(1): 65-77
In: Téthys. Station Marine d'Endoume, Centre d'Océanographie de Marseille: Marseille. ISSN 0040-4012, more
Peer reviewed article  

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Keywords
    Lagoons; Scrobicularia plana (da Costa, 1778) [WoRMS]; Venerupis aurea (Gmelin, 1791) [WoRMS]; Ruditapes decussatus (Linnaeus, 1758) [WoRMS]; MED, Mediterranean [Marine Regions]; Marine; Brackish water

Authors  Top 
  • Guelorget, O.
  • Michel, P.

Abstract
    From October 1973 to December 1974, a quantitative study of the benthic macrofauna has been carried out in three stations situated in a brackish Mediterranean lagoon, the Prevost lagoon (Hérault, France). One of them is located in well sorted sands and the others in quiet muddy sands, where the Grau flows into the lagoon. The Grau, a canal linking the lagoon to the sea, results in a continuous vivification of the region and a relative stability of hydrological conditions compared with the rest of the lagoon. The density and biomass reach very high levels : I 0 015 organisms per sq. meter and 293,6 g per sq. meter (dry weight) in well sorted sands, 4 010 organisms per sq. meter and 44,5 g per sq. meter in muddy sands. Quite notable qualitative and quantitative fluctuations througout the cycle are closely connected with local hydrological conditions, which are dependant upon seasonal changes. Molluscs (Scrobicularia plana, Venerupis aurea and V. decussata) represent most of the biomass, respectively 96,5 % (well sorted sand) and 76 % (muddy sands).

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