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  4. MB1-219 - Laminaria hyperborea sur substrats hétérogènes soumis aux courants de marée de l'infralittoral en Atlantique
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MB1-219 - Laminaria hyperborea sur substrats hétérogènes soumis aux courants de marée de l'infralittoral en Atlantique

Laminaria hyperborea on tide-swept Atlantic infralittoral mixed substrata
MB1-218 - Laminaria hyperborea sur roche soumise aux courants des marées de l'infralittoral en Atlantique
MB1-21A - Laminaria hyperborea et algues rouges foliacées sur roche modérément exposée de l'infralittoral en Atlantique

Classification des habitats EUNIS 2022

Descriptif de l'habitat

Wave-exposed through to wave-sheltered, tide-swept infralittoral mixed substrata with Laminaria hyperborea forest/park and other kelp species such as Laminaria saccharina. The rich under-storey and stipe flora is characterised by foliose seaweeds including the brown algae Dictyota dichotoma. The kelp stipes support epiphytes such as Cryptopleura ramosa, Callophyllis laciniata and Phycodrys rubens. At some sites, instead of being covered by red seaweeds, the kelp stipes are heavily encrusted by the ascidians Botryllus schlosseri and the bryozoan Alcyonidium diaphanum. Epilithic seaweeds such as Desmerestia aculeata, Odonthalia dentate, Delesseria sanguinea, Plocamium cartilagineum, Callophyllis laciniata, and crustose seaweeds commonly occur beneath the kelp. The kelp fronds are often covered with growths of the hydroid Obelia geniculata or the bryozoan Membranipora membranacea. On the rock surface, a rich fauna comprising anthozoans such as Alcyonium digitatum and Urticina felina, colonial ascidians such as Clavelina lepadiformis and the calcareous tubeworm Pomatoceros triqueter occurs. More mobile species include the gastropods Gibulla cineria and Calliostoma zizyphinum, the crab Cancer pagurus and the echinoderms Crossaster papposus, Henricia oculata, Asterias rubens and Echinus esculentus. Two variants are described; tide-swept kelp forest on upper infralittoral mixed substrata (unit MB1-2191) and tide-swept kelp park on lower infralittoral mixed substrata (unit MB1-2192).

Bibliography

European Topic Centre on Biological Diversity 2022. EUNIS marine habitat classification 2022 including crosswalks. Table Excel. (Source)