MB3-2112 - Saccharina latissima (anciennement Laminaria saccharina) et algues rouges robustes sur gravier et cailloutis de l'infralittoral en Atlantique

Laminaria saccharina and robust red algae on Atlantic infralittoral gravel and pebble

Classification des habitats EUNIS 2022

Descriptif de l'habitat

Shallow kelp community found on gravel and gravelly sand in slightly less exposed areas than MB1-274 but in moderately strong tidal currents, and characterised by occasional Laminaria saccharina with an undergrowth of robust red seaweeds. Characteristic red seaweeds, as with MB1-274, include Plocamium cartilagineum, Halarachnion ligulatum and Brongniartella byssoides ; however the greater stability of this biotope allows a slightly more diverse range of red seaweeds to become established including Polyides rotundus, Rhodophyllis divaricata, Delesseria sanguinea and Nitophyllum punctatum. Coralline encrusting algae may be found covering the larger pebbles. Laminaria hyperborea may also be present within this biotope, although at low densities. Other brown algal species present include Desmarestia spp., Dictyota dichotoma and Chorda filum, all at low abundance. The ubiquitous green seaweed Ulva sp. may be found attached to larger pebbles.

Bibliography

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