2. Données et outils
  3. Rechercher un habitat
  4. MC1-212 - Tubularia indivisa sur roche du circalittoral soumise aux courants de marée en Atlantique
  5. Description
MC1-212 - Tubularia indivisa sur roche du circalittoral soumise aux courants de marée en Atlantique

Tubularia indivisa on tide-swept Atlantic circalittoral rock
MC1-211 - Balanus crenatus et Tubularia indivisa sur roche du circalittoral extrêmement soumise aux courants de marée en Atlantique
MC1-213 - Tapis de bryozoaires et éponges dressées sur roche du circalittoral soumise aux courants de marée en Atlantique

Classification des habitats EUNIS 2022

Descriptif de l'habitat

This biotope is typically found on the vertical and upper faces of strongly tide-swept, wave-exposed circalittoral bedrock and boulders. It is characterised by a dense carpet of the robust hydroid Tubularia indivisa. The barnacle Balanus crenatus, where present, is recorded as common. The accompanying species in the community are determined by tidal stream strength. On the more sheltered sides of headlands, where tidal streams are accelerated, sponges such as Pachymatisma johnstonia, Esperiopsis fucorum, Myxilla incrustans and Halichondria panicea proliferate forming the MC1-2121 sub-unit. There may also be a scattered bryozoan turf, formed by criisid bryozoans. However, where tidal streams are slightly reduced, but on more wave-exposed coasts, anthozoans such as Alcyonium digitatum become more prominent forming the biotope MC1-2122. Other species recorded in this biotope include the anemones Sagartia elegans, Actinothoe sphyrodeta, Corynactis virdis and Urticina felina. There may be scattered clumps of hydroids such as Sertularia argentea and Nemertesia antennina. Where `relative shelter' is afforded by the topography of the seabed, the bryozoans Flustra foliacea, Alcyonidium diaphanum and the crab Cancer pagurus may be found. More ubiqutous species such as Asterias rubens and Calliostoma zizyphinum may also be present.

Bibliographie

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