2. Données et outils
  3. Rechercher un habitat
  4. MC1-2812 - Sabellaria spinulosa, didemnidés et petites ascidies sur roche du circalittoral soumise aux courants de marée et modérément exposée aux vagues en Atlantique
  5. Description
MC1-2812 - Sabellaria spinulosa, didemnidés et petites ascidies sur roche du circalittoral soumise aux courants de marée et modérément exposée aux vagues en Atlantique

Sabellaria spinulosa, didemnid and small ascidians on tide-swept moderately wave-exposed Atlantic circalittoral rock
MC1-2811 - Sabellaria spinulosa avec tapis de bryozoaires et de balanes sur roche envasée du circalittoral en eau turbide en Atlantique

Classification des habitats EUNIS 2022

Descriptif de l'habitat

This variant is typically found on tide-swept, moderately wave-exposed circalittoral bedrock, boulders and cobbles subject to slight sand-scour. It occurs predominantly in the lower circalittoral. This variant normally appears as a bedrock/boulder outcrop or reef with a dense crust of the polychaete Sabellaria spinulosa and a dense turf of didemnid ascidians and scour-tolerant bryozoans such as Flustra foliacea, Pentapora foliacea and Cellaria species. There may be discreet clumps of Alcyonium digitatum and sparse sponges such as Tethya aurantium and Phorbas fictitius. Patchy occurrences of the small ascidians Polycarpa scuba, Polycarpa pomaria and Distomus variolosus may be present on the tops of rocks and boulders whilst in crevices between, the anemone Urticina felina may be found. Species such as Asterias rubens, Crossaster papposus, the serpulid worm Salmacina dysteri and the anemone Sagartia elegans are occasionally seen on the rock surface. This variant has been recorded from the Lleyn Peninsula, the Skerries and around Pembrokeshire in Wales.

Bibliographie

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