Liste des biotopes et milieux floristiques.Biotope - Typologie Européenne EUNIS
A5.5212 - Niveau 6 : Saccharina latissima (anciennement Laminaria saccharina) et algues rouges robustes sur gravier et cailloutis infralittoraux
Description
Shallow kelp community found on gravel and gravelly sand in slightly less exposed areas than A5.5211 but in moderately strong tidal currents, and characterised by occasional Laminaria saccharina with an undergrowth of robust red seaweeds. Characteristic red seaweeds, as with A5.5211, include Plocamium cartilagineum, Halarachnion ligulatum and Brongniartella byssoides; however the greater stability of this biotope allows a slightly more diverse range of red seaweeds to become established including Polyides rotundus, Rhodophyllis divaricata, Delesseria sanguinea and Nitophyllum punctatum. Coralline encrusting algae may be found covering the larger pebbles. Laminaria hyperborea may also be present within this biotope, although at low densities. Other brown algal species present include Desmarestia spp., Dictyota dichotoma and Chorda filum, all at low abundance. The ubiquitous green seaweed Ulva sp. may be found attached to larger pebbles.
Taxons (Liens actifs si espèces présentes)
Bonnemaisonia asparagoides (Woodward) C.Agardh, 1822 ( Esp. caract. )
Brongniartella byssoides (Goodenough & Woodward) F.Schmitz, 1893 ( Esp. caract. )
Callophyllis laciniata (Hudson) Kütz., 1843 ( Esp. caract. )
Chylocladia verticillata (Lightf.) Bliding, 1928 ( Esp. caract. )
Corallinaceae Lamouroux, 1812 ( Esp. caract. )
Cryptopleura ramosa (Hudson) L.Newton, 1931 ( Esp. caract. )
Cystoclonium purpureum (Hudson) Batters, 1902 ( Esp. caract. )
Delesseria sanguinea (Hudson) J.V.Lamour., 1813 ( Esp. caract. )
Dilsea carnosa (Schmidel) Kuntze, 1898 ( Esp. caract. )
Gracilaria gracilis (Stackh.) M.Steentoft, L.M.Irvine & W.F.Farnham, 1995 ( Esp. caract. )
Halarachnion ligulatum (Woodward) Kütz., 1843 ( Esp. caract. )
Hypoglossum hypoglossoides (Stackh.) F.S.Collins & Hervey, 1917 ( 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. )
Phyllophora crispa (Hudson) P.S.Dixon, 1964 ( Esp. caract. )
Plocamium cartilagineum (L.) P.S.Dixon, 1967 ( Esp. caract. )
Polyides rotunda (Hudson) Gaillon, 1828 ( Esp. caract. )
Polysiphonia elongata (Hudson) Sprengel, 1827 ( Esp. caract. )
Pterothamnion plumula (J.Ellis) Nägeli, 1855 ( Esp. caract. )
Rhodomela confervoides (Hudson) P.C.Silva, 1952 ( Esp. caract. )
Rhodophyllis divaricata (Stackh.) Papenf., 1950 ( Esp. caract. )
Trailliella intricata Batters, 1896 ( Esp. caract. )
Ulva L., 1753 ( Esp. caract. )
Brongniartella byssoides (Goodenough & Woodward) F.Schmitz, 1893 ( Esp. caract. )
Callophyllis laciniata (Hudson) Kütz., 1843 ( Esp. caract. )
Chylocladia verticillata (Lightf.) Bliding, 1928 ( Esp. caract. )
Corallinaceae Lamouroux, 1812 ( Esp. caract. )
Cryptopleura ramosa (Hudson) L.Newton, 1931 ( Esp. caract. )
Cystoclonium purpureum (Hudson) Batters, 1902 ( Esp. caract. )
Delesseria sanguinea (Hudson) J.V.Lamour., 1813 ( Esp. caract. )
Dilsea carnosa (Schmidel) Kuntze, 1898 ( Esp. caract. )
Gracilaria gracilis (Stackh.) M.Steentoft, L.M.Irvine & W.F.Farnham, 1995 ( Esp. caract. )
Halarachnion ligulatum (Woodward) Kütz., 1843 ( Esp. caract. )
Hypoglossum hypoglossoides (Stackh.) F.S.Collins & Hervey, 1917 ( 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. )
Phyllophora crispa (Hudson) P.S.Dixon, 1964 ( Esp. caract. )
Plocamium cartilagineum (L.) P.S.Dixon, 1967 ( Esp. caract. )
Polyides rotunda (Hudson) Gaillon, 1828 ( Esp. caract. )
Polysiphonia elongata (Hudson) Sprengel, 1827 ( Esp. caract. )
Pterothamnion plumula (J.Ellis) Nägeli, 1855 ( Esp. caract. )
Rhodomela confervoides (Hudson) P.C.Silva, 1952 ( Esp. caract. )
Rhodophyllis divaricata (Stackh.) Papenf., 1950 ( Esp. caract. )
Trailliella intricata Batters, 1896 ( Esp. caract. )
Ulva L., 1753 ( Esp. caract. )
Analyse Ecologie du milieu (En fonction des espèces présentes)