Biotope - Typologie Européenne EUNIS

A5.624 - Niveau 5 : Moulières à Modiolus modiolus avec Mimachlamys varia, éponges, hydraires et bryozoaires sur substrat hétérogène du circalittoral très abrité et soumis à de faibles courants de marée
Description
Dense Modiolus modiolus beds, covered by hydroids and bryozoans, on soft gravelly, shelly mud with pebbles in areas of slight or moderate tidal currents. The variable scallop (Chlamys varia) is frequently found in large numbers amongst the Modiolus shells. Hydroids such as Halecium spp. and Kirchenpaueria pinnata and ascidians such as Ascidiella aspersa, Corella parallelogramma and Ciona intestinalis may be found attached to pebbles or mussel shells. The echinoderms Ophiothrix fragilis and Antedon bifida are often frequent in this biotope as is the encrusting polychaete Pomatoceros triqueter. Similar communities have been found on cobble and pebble plains in stable, undisturbed conditions in some sealochs, although not all these examples have Modiolus beds.
Taxons (Liens actifs si espèces présentes)
Analyse Ecologie du milieu (En fonction des espèces présentes)