EUNIS habitat classification 2017 > M - Marine benthic habitats > MC4 - Circalittoral mixed sediment

Circalittoral mixed sediment

Description (English)

Mixed (heterogeneous) sediment habitats in the circalittoral zone (generally below 15-20 m) including well mixed muddy gravelly sands or very poorly sorted mosaics of shell, cobbles and pebbles embedded in or lying upon mud, sand or gravel. Due to the variable nature of the seabed a variety of communities can develop which are often very diverse. A wide range of infaunal polychaetes, bivalves, echinoderms and burrowing anemones such as Cerianthus lloydii are often present in such habitat and the presence of hard substrata (shells and stones) on the surface enables epifaunal species to become established, particularly hydroids such as Nemertesia spp and Hydrallmania falcata. The combination of epifauna and infauna can lead to species rich communities. Coarser mixed sediment communities may show a strong resemblance, in terms of infauna, to biotopes within MB-4.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code MC4
Relation to Resolution 4 habitat type (used for designation of Emerald sites)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Hydrallmania falcata
Species scientific name English common name Species group
Hydrallmania falcata Invertebrates

History

Classification Code Habitat type name Relationship type Comment
EUNIS Habitat Classification 200410 A5 Sublittoral sediment same
EUNIS Habitat Classification 200410 A5.4 Sublittoral mixed sediments same
EUNIS Habitat Classification 200410 A5.44 Circalittoral mixed sediments same
EUNIS Habitat Classification 200308 A4.76 Communities of shelf-edge detritic bottom narrower
EUNIS Habitat Classification 200308 A4 Sublittoral sediment same
EUNIS Habitat Classification 200308 A4.75 Animal communities of deep circalittoral mixed sediment bottoms narrower
EUNIS Habitat Classification 200308 A4.4 Sublittoral mixed sediment same
EUNIS Habitat Classification 200308 A4.44 Animal communities of circalittoral mixed sediments wider
EUNIS Habitat Classification 200202 A4 Sublittoral sediments same
EUNIS Habitat Classification 200202 A4.75 Animal communities of deep circalittoral mixed sediment bottoms narrower
EUNIS Habitat Classification 200202 A4.4 Sublittoral combination sediments narrower
EUNIS Habitat Classification 200202 A4.44 Animal communities of circalittoral mixed sediments same
EUNIS Habitat Classification 200202 A4.76 Communities of shelf-edge detritic bottom narrower
EUNIS Habitat Classification 199910 A4 Sublittoral sediments same
EUNIS Habitat Classification 199910 A4.49 Animal communities of circalittoral mixed sediments same
EUNIS Habitat Classification 199910 A4.4 Sublittoral mixed sediments narrower
EUNIS Habitat Classification 199910 A4.72 Biocenosis of shelf-edge detritic bottom narrower
EUNIS Habitat Classification 199811 A4 Sublittoral sediments same
EUNIS Habitat Classification 199712 X16 Sublittoral sediments same
Palaearctic Habitat Classification 199905 11.22 Sublittoral soft seabeds narrower
Palaearctic Habitat Classification 199905 11.23 Sublittoral pebbly seabeds narrower
Palaearctic Habitat Classification 1997 11.23 Sublittoral pebbly seabeds narrower
Palaearctic Habitat Classification 1997 11.22 Sublittoral soft seabeds narrower
Palaearctic Habitat Classification 1996 11.23   narrower
Palaearctic Habitat Classification 1996 11.22   narrower
Palaearctic Habitat Classification 1993 11.22   narrower
Palaearctic Habitat Classification 1993 11.23   narrower
CORINE Biotopes Classification 1991 11.23   narrower
CORINE Biotopes Classification 1991 11.22   narrower
MNCR BioMar 97.06 (Britain & Ireland) SS Sublittoral sediments same
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