MB3-214 - Saccharina latissima (anciennement Laminaria saccharina) et Gracilaria gracilis avec éponges et ascidies sur sédiment de l'infralittoral en milieu à salinité variable en Atlantique

Laminaria saccharina and Gracilaria gracilis with sponges and ascidians on variable salinity Atlantic infralittoral sediment

Classification des habitats EUNIS 2022

Descriptif de l'habitat

Shallow kelp community found on stony sediment, in extremely sheltered, variable salinity conditions, with moderately strong tidal currents. The community is characterised by a more sparse covering of Laminaria saccharina, particularly when compared to the fully marine version of this sub biotope (MB3-213). Beneath the canopy the community is characterised by the red algae Gracilaria gracilis, and a variety of faunal species in particular sponges (Suberites ficus and Halichondria panacea) and ascidians (Ascidiella aspersa and Dendrodoa grossularia). The stony substrate provides a surface for attachment for these and many other filter and suspension feeding species, particularly barnacles (Balanus crenatus), hydroids (Urticina feline and Hydractinia echinata) and anemones. Other members of the understory may include a variety of filamentous and foliose red algae in particular Pterothamnion plumula, and the green alga Ulva.

Bibliography

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