2. Données et outils
  3. Rechercher un habitat
  4. MC1-2132 - Tapis mixte de bryozoaires et d'éponges dressées, avec Dysidea fragilis et Actinothoe sphyrodeta, sur roche du circalittoral soumise aux courants de marée et exposée aux vagues en Atlantique
  5. Description
MC1-2132 - Tapis mixte de bryozoaires et d'éponges dressées, avec Dysidea fragilis et Actinothoe sphyrodeta, sur roche du circalittoral soumise aux courants de marée et exposée aux vagues en Atlantique

Mixed turf of bryozoans and erect sponges with Dysidia fragilis and Actinothoe sphyrodeta on tide-swept wave-exposed Atlantic circalittoral rock
MC1-2131 - Eunicella verrucosa et Pentapora fascialis sur roche du circalittoral exposée aux vagues en Atlantique
MC1-2133 - Tapis mixte de bryozoaires et éponges dressées avec Sagartia elegans sur roche du circalittoral soumise aux courants de marée en Atlantique

Classification des habitats EUNIS 2022

Descriptif de l'habitat

This variant typically occurs on exposed and moderately wave-exposed bedrock and boulders subject to a variety of tidal regimes (from strong through to weak). It is found mainly in the 10-20m depth range and does not usually occur deeper than 30 m. It therefore often straddles the upper circalittoral and lower infralittoral. It often has a light covering of silt and sand may be in the vicinity. Sponges form a dominant part of this variant, although cover usually appears patchy, with no single species dominating. Species present include Dysidea fragilis, Pachymatisma johnstonia, Esperiopsis fucorum, Hemimycale columella, Cliona celata, Stelligera rigida, Polymastia boletiformis, Stelligera stuposa, Raspailia ramosa, Tethya aurantium, Polymastia mamillaris and Axinella dissimilis. Tufts of large hydroids such as Nemertesia antennina, frequently recorded on the tops of outcrops and boulders, stand out more clearly than the understorey of finer hydroid and bryozoan turf such as Aglaophenia pluma, Bugula flabellata, Bugula plumosa, crisiids, Cellaria sinuosa and Bugula turbinata. Other bryozoans such as Alcyonidium diaphanum and Flustra foliacea are also frequently recorded. Other more widespread species present include Asterias rubens, Actinothoe sphyrodeta, Balanus crenatus, Caryophyllia smithii, Corynactis viridis, Necora puber and Clavelina lepadiformis. This variant has been recorded off the south east coast of Ireland, the welsh coast and Lundy Island.
Situation: This biotope is typically found on exposed coasts, with exposed kelp forest in the infralittoral zone, characterised by species such as Laminaria hyperborea and Saccorhiza polyschides. The MC1-2132 variant is usually found below MC1-2131, with similar Geographic range.

Bibliographie

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