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  4. MB3-236 - Cumacées et Chaetozone setosa dans du sable graveleux de l'infralittoral en Atlantique
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MB3-236 - Cumacées et Chaetozone setosa dans du sable graveleux de l'infralittoral en Atlantique

Cumaceans and Chaetozone setosa in Atlantic infralittoral gravelly sand
MB3-235 - Glycera lapidum dans du gravier et du sable mobile de l'infralittoral à biocénose appauvrie en Atlantique
MB3-237 - Bancs de Lanice conchilega et autres polychètes dans du sable graveleux de l'infralittoral soumis aux courants de marée en Atlantique

Classification des habitats EUNIS 2022

Descriptif de l'habitat

In shallow medium-fine sands with gravel, on moderately exposed open coasts, communities dominated by cumacean crustaceans such as Iphinoe trispinosa and Diastylis bradyi along with the cirratulid polychaete Chaetozone setosa (agg.) may occur. Chaetozone setosa is a species complex so it is likely that some variability in nomenclature will be found in the literature. Other important taxa may include the polychaetes Anaitides spp., Lanice conchilega, Eteone longa and Scoloplos armiger. This community may be subject to periodical sedimentary disturbance, such that a sub-climactic community may develop with opportunistic taxa such as C. setosa and S. armiger often dominating the community (Allen 2000).
Situation: This biotope may be found in areas with moderate currents and wave action often facing into the prevailing wind and along the Holderness coast of the North Sea. It is possible that this biotope has developed due to chronic sedimentary disturbance in areas where the units MC5-214 or MB5-236 would normally develop as these biotopes are often found in more sheltered areas adjacent to A5.136.
Temporal variation: The importance of the cumacean crustaceans in this biotope is unusual, and their numbers are likely to fluctuate over time; at times of increased disturbance it is likely that C. setosa will become more dominant.

Bibliography

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