Liste des biotopes et milieux floristiques.

Biotope - Typologie Européenne EUNIS

A5.5111 - Niveau 6 : Bancs de maërl à Phymatolithon calcareum avec algues rouges dans du gravier ou du sable grossier propre infralittoral en eau peu profonde

Description

Upper infralittoral maerl beds characterised by Phymatolithon calcareum in gravels and sand with a wide variety of associated red seaweeds. These algae typically include Dictyota dichotoma, Plocamium cartilagineum, Phycodrys rubens, Chondrus crispus, Halarachnion ligulatum, Chylocladia verticillata, Hypoglossum hypoglossoides and Nitophyllum punctum. These species are not restricted to maerl beds but their abundance on maerl beds differentiates this biotope from A5.5112. Anthozoans and echinoderms are much less common in this biotope than in A5.5112, which typically occurs deeper than A5.5111.

Taxons (Liens actifs si espèces présentes)

Bonnemaisonia asparagoides (Woodward) C.Agardh, 1822 ( Esp. caract. )
Brongniartella byssoides (Goodenough & Woodward) F.Schmitz, 1893 ( Esp. caract. )
Cystoclonium purpureum (Hudson) Batters, 1902 ( Esp. caract. )
Lomentaria clavellosa (Lightf. ex Turner) Gaillon, 1828 ( Esp. caract. )
Nitophyllum punctatum (Stackh.) Grev., 1830 ( Esp. caract. )
Phycodrys rubens (L.) Batters, 1902 ( Esp. caract. )
Phymatolithon calcareum (Pallas) W.H.Adey & D.L.McKibbin, 1970 ( Esp. caract. )
Plocamium cartilagineum (L.) P.S.Dixon, 1967 ( Esp. caract. )
Trailliella intricata Batters, 1896 ( Esp. caract. )
Ulva L., 1753 ( Esp. caract. )

Analyse Ecologie du milieu (En fonction des espèces présentes)

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