Liste des biotopes et milieux floristiques.

Biotope - Typologie Européenne EUNIS

A5.443 - Niveau 5 : Kurtiella bidentata et Thyasira spp. dans du sédiment hétérogène envasé circalittoral

Description

In moderately exposed or sheltered, circalittoral muddy sands and gravels a community characterised by the bivalves Thyasira spp. (often Thyasira flexuosa), Mysella bidentata and Prionospio fallax may develop. Infaunal polychaetes such as Lumbrineris gracilis, Chaetozone setosa and Scoloplos armiger are also common in this community whilst amphipods such as Ampelisca spp. and the cumacean Eudorella truncatula may also be found in some areas. The brittlestar Amphiura filiformis may also be abundant at some sites. Conspicuous epifauna may include encrusting bryozoans Escharella spp. particularly Escharella immersa and, in shallower waters, maerl (Phymatolithon calcareum), although at very low abundances and not forming maerl beds.

Taxons (Liens actifs si espèces présentes)

Anthozoa sp. ( Esp. caract. )
Corallinaceae Lamouroux, 1812 ( Esp. caract. )
Crisia sp. ( Esp. caract. )
Hildenbrandia rubra (Sommerfelt) Menegh., 1841 ( Esp. caract. )
Nematoda sp. ( Esp. caract. )
Nemertea sp. ( Esp. caract. )
Nephtys sp. ( Esp. caract. )
Phoronis sp. ( Esp. caract. )
Phymatolithon calcareum (Pallas) W.H.Adey & D.L.McKibbin, 1970 ( Esp. caract. )
Tubulipora sp. ( Esp. caract. )

Analyse Ecologie du milieu (En fonction des espèces présentes)

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