Liste des biotopes et milieux floristiques.

Biotope - Typologie Européenne EUNIS

A5.52 - Niveau 4 : Biocénoses à laminaires et algues sur sédiment subtidal
Description
Taxons (Liens actifs si espèces présentes)
Bonnemaisonia asparagoides (Woodward) C.Agardh, 1822, Brongniartella byssoides (Goodenough & Woodward) F.Schmitz, 1893, Corallinaceae Lamouroux, 1812, Delesseria sanguinea (Hudson) J.V.Lamour., 1813, Gracilaria gracilis (Stackh.) M.Steentoft, L.M.Irvine & W.F.Farnham, 1995, Halarachnion ligulatum (Woodward) Kütz., 1843, Lomentaria clavellosa (Lightf. ex Turner) Gaillon, 1828, Nematoda sp., Nemertea sp., Phycodrys rubens (L.) Batters, 1902, Phyllophora crispa (Hudson) P.S.Dixon, 1964, Plocamium cartilagineum (L.) P.S.Dixon, 1967, Polyides rotunda (Hudson) Gaillon, 1828, Polysiphonia elongata (Hudson) Sprengel, 1827, Pterothamnion plumula (J.Ellis) Nägeli, 1855, Rhodophyllis divaricata (Stackh.) Papenf., 1950, Terebellidae sp., Trailliella intricata Batters, 1896, Ulva L., 1753,
A5.524 - Niveau 5 : Saccharina latissima (anciennement Laminaria saccharina), Gracilaria gracilis et algues brunes sur sédiment infralittoral en milieu marin
Description
Shallow kelp community found on muddy sand, in moderately exposed or sheltered, fully marine conditions, with weak tidal currents. The community is characterised by a reasonable covering of Laminaria saccharina. Frequent Chorda filum may also form part of the canopy although not at the abundance in A5.522. Beneath the canopy the community is characterised by the red algae Gracilaria gracilis, and various brown algal species particularly Dictyota dichotoma. Other members of the understory may include a variety of other filamentous and foliose red algae in particular Ceramium nodulosum and the green alga Ulva. The muddy sand substrate supports a variety of faunal species including polychaetes (Lanice conchilega) and gastropods (Hinia reticulata).
Taxons (Liens actifs si espèces présentes)
Ceramium nodulosum (Lightf.) Ducluzeau, 1806 ( Esp. caract. )
Corallinaceae Lamouroux, 1812 ( Esp. caract. )
Dudresnaya verticillata (With.) Le Jolis, 1863 ( Esp. caract. )
Gracilaria gracilis (Stackh.) M.Steentoft, L.M.Irvine & W.F.Farnham, 1995 ( Esp. caract. )
Halarachnion ligulatum (Woodward) Kütz., 1843 ( Esp. caract. )
Polyides rotunda (Hudson) Gaillon, 1828 ( Esp. caract. )
Rhodophyllis divaricata (Stackh.) Papenf., 1950 ( Esp. caract. )
Ulva L., 1753 ( Esp. caract. )
Analyse Ecologie du milieu (En fonction des espèces présentes)