MB5-233 - Nephtys cirrosa et Bathyporeia spp. dans du sable de l'infralittoral en Atlantique (EUNIS 2022)

MB5-233 - Nephtys cirrosa et Bathyporeia spp. dans du sable de l'infralittoral en Atlantique

Nephtys cirrosa and Bathyporeia spp. in Atlantic infralittoral sand

MB5-232 - Sertularia cupressina et Hydrallmania falcata sur sable avec galets ou cailloutis de l'infralittoral soumis aux courants de marée en Atlantique

MB5-234 - Amphipodes tubicoles semi-permanents et polychètes dans du sable de l'infralittoral en Atlantique

Classification des habitats EUNIS 2022

Descriptif de l'habitat

Well-sorted medium and fine sands characterised by Nephtys cirrosa and Bathyporeia spp. (and sometimes Pontocrates spp.) which occur in the shallow sublittoral to at least 30 m depth. This biotope occurs in sediments subject to physical disturbance, as a result of wave action (and occasionally strong tidal streams). The magelonid polychaete Magelona mirabilis may be frequent in this biotope in more sheltered, less tideswept areas whilst in coarser sediments the opportunistic polychaete Chaetozone setosa may be commonly found. The faunal diversity of this biotope is considerably reduced compared to less disturbed biotopes (such as unit MB5-236) and for the most part consists of the more actively-swimming amphipods. Sand eels Ammodytes sp. may occasionally be observed in association with this biotope (and others) and spionid polychaetes such as Spio filicornis and S. martinensis may also be present. Occasional Lanice conchilega may be visible at the sediment surface.
Temporal variation: Stochastic recruitment events in the Nephtys cirrosa populations may be very important to the population size of other polychaetes present and may therefore create a degree of variation in community composition (Bamber 1994).

Bibliographie

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