MB5-232 - Sertularia cupressina et Hydrallmania falcata sur sable avec galets ou cailloutis de l'infralittoral soumis aux courants de marée en Atlantique

Sertularia cupressina and Hydrallmania falcata on tide-swept Atlantic infralittoral sand with cobbles or pebbles

Classification des habitats EUNIS 2022

Descriptif de l'habitat

Shallow sands with cobbles and pebbles, exposed to strong tidal streams, with conspicuous colonies of hydroids, particularly Hydrallmania falcata and to a lesser extent Sertularia cupressina and S. argentea. These hydroids are tolerant to periodic submergence and scour by sand. Both diving and dredge surveys will easily record this biotope. Flustra foliacea, Balanus crenatus and Alcyonidium diaphanum may also occur on the more stable cobbles and pebbles, with Urticina felina and occasional Lanice conchilega present in the sand. Infaunal components of the other biotopes of sublittoral sand or coarse sediments may occur in this biotope as may elements of the 'Venus' associations; indeed, this biotope may be at one extreme of the spectrum of such associations (E.I.S. Rees pers. comm. 1997) and this biotope may be best considered an epibiotic overlay.

Bibliographie

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