2. Données et outils
  3. Rechercher un habitat
  4. MB1-275 - Éponges encroûtantes sur parois de grottes ou de ravins de l'infralittoral extrêmement battus par les vagues en Atlantique
  5. Description
MB1-275 - Éponges encroûtantes sur parois de grottes ou de ravins de l'infralittoral extrêmement battus par les vagues en Atlantique

Crustose sponges on extremely wave-surged Atlantic infralittoral cave or gully walls
MB1-274 - Dendrodoa grossularia et Clathrina coriacea sur paroi rocheuse de l'infralittoral verticale battue par les vagues en Atlantique
MB1-276 - Encroûtements de corallinales dans des ravins creusés par les vagues et sur roche de l'infralittoral abrasée par le sable en Atlantique

Classification des habitats EUNIS 2022

Descriptif de l'habitat

Walls, or massive boulders, in caves or gullies that are subject to severe wave-surge and characterised by extensive thin crusts of the sponge Halichondria panicea with smaller patches of other sponges such as Esperiopsis fucorum or Clathrina coriacea. Small turfs of robust hydroids, such as Diphasia rosacea and Ventromma halecioides, and patches of the barnacle Balanus crenatus, coralline crusts and tube-building spirorbid polychaetes may be present. The starfish Henricia spp., the brittlestar Ophiopholis aculeata and the crabs Cancer pagurus and Necora puber can be present. The anemones Sagartia elegans, Urticina felina and Actinia equina can be found in cracks and crevices or under boulders. The mussel Mytilus edulis may be present in low densities.
Situation: This surge-tolerant biotope of low-growing fauna is typically confined to the mid or rear section of caves (or the narrowest part of gullies) where the wave-surge is intensified. It generally abuts the less surged ascidian-sponge communities (units MB1-272, MB1-274 and MB1-273). A highly scoured zone of barnacles and calcareous tubeworms often form a zone below, abutting the cave/gully floor (MB1-2761).

Bibliographie

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