MA1-247 - Mytilus edulis, Fucus serratus et algues rouges sur roche du médiolittoral inférieur modérément exposée

Mytilus edulis, Fucus serratus and red seaweeds on moderately exposed lower eulittoral rock

Classification des habitats EUNIS 2022

Descriptif de l'habitat

Lower eulittoral moderately exposed bedrock covered by a dense community of large individuals of the mussel Mytilus edulis , often with a scarce covering of the wrack Fucus serratus and red seaweeds. The red seaweeds may include Palmaria palmata, Mastocarpus stellatus, Ceramium spp., Audouinella spp. and Chondrus crispus. Ephemeral green seaweeds such as Enteromorpha intestinalis and Ulva lactuca commonly occur on the shells of the mussels. The barnacle Semibalanus balanoides is common on both the mussel valves and on patches of bare rock, where the limpet Patella vulgata is also found, often at high abundance. The whelk Nucella lapillus and the winkle Littorina littorea occur within the mussel bed, as well as the polychaete Pomatoceros triqueter and the crab Carcinus maenas. The anemone Actinia equina is present in cracks and crevices. These moist areas can be overgrown by coralline crusts.
Situation: Above this biotope on sand influenced shores is a M. edulis and F. vesiculosus dominated biotope (unit MA1-246). In the sublittoral fringe below MA1-247 is a biotope dominated by the kelp Laminaria digitata (MB1-2171).

Bibliography

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