2. Données et outils
  3. Rechercher un habitat
  4. MB1-23A1 - Saccharina latissima (anciennement Laminaria saccharina) et Laminaria digitata sur roche abritée de la frange infralittorale inférieure en Atlantique
  5. Description
MB1-23A1 - Saccharina latissima (anciennement Laminaria saccharina) et Laminaria digitata sur roche abritée de la frange infralittorale inférieure en Atlantique

Laminaria saccharina and Laminaria digitata on sheltered Atlantic sublittoral fringe rock

MB1-23A2 - Forêt de Saccharina latissima (anciennement Laminaria saccharina) sur roche très abritée de l'infralittoral supérieur en Atlantique

Classification des habitats EUNIS 2022

Descriptif de l'habitat

Sheltered bedrock and boulders in the sublittoral fringe characterised by a mixed canopy of the kelp Laminaria digitata (usually in its broad-fronded cape-form) and Laminaria saccharina - both species are generally Frequent or greater. Beneath the kelp canopy, the understorey of red seaweeds often includes Chondrus crispus, Dumontia contorta, Bonnemaisonia hamifera and Plocamium cartilagineum. The surface of the rock is usually covered with encrusting coralline algae as well as non-calcified red crusts and the tube-building polychaete Pomatoceros triqueter. The brown seaweeds Chorda filum, Ectocarpaceae and Fucus serratus can be present along with the green seaweeds Ulva lactuca and Enteromorpha intestinalis. Patches of the sponge Halichondria panicea can frequently be found in cracks and crevices. Beneath and between boulders a variety of mobile crustaceans such as Carcinus maenas, the gastropod Gibbula cineraria and the starfish Asterias rubens are common.
Situation: Where hard substrata occur on the shore, this biotope will be found below the F. serratus zone (units MA1-23F1, MA1-244 or MA1-23F2 on mixed substrata). With such sheltered shores, the transition between sublittoral fringe and the true sublittoral zone may not be distinct; this biotope therefore extends into the shallow sublittoral kelp forest below (MB1-2391, MB1-2391 or MB1-23B).

Bibliographie

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