EUNIS habitat classification 2012 amended 2019 > A - Marine habitats > A5 - Sublittoral sediment > A5.6 - Sublittoral biogenic reefs > A5.62 - Sublittoral mussel beds on sediment > A5.624 - Modiolus modiolus beds with Chlamys varia, sponges, hydroids and bryozoans on slightly tide-swept very sheltered circalittoral mixed substrata

Modiolus modiolus beds with Chlamys varia, sponges, hydroids and bryozoans on slightly tide-swept very sheltered circalittoral mixed substrata

English name: Modiolus modiolus beds with Chlamys varia, sponges, hydroids and bryozoans on slightly tide-swept very sheltered circalittoral mixed substrata

Description (English)

Dense Modiolus modiolus beds, covered by hydroids and bryozoans, on soft gravelly, shelly mud with pebbles in areas of slight or moderate tidal currents. The variable scallop (Chlamys varia) is frequently found in large numbers amongst the Modiolus shells. Hydroids such as Halecium spp. and Kirchenpaueria pinnata and ascidians such as Ascidiella aspersa, Corella parallelogramma and Ciona intestinalis may be found attached to pebbles or mussel shells. The echinoderms Ophiothrix fragilis and Antedon bifida are often frequent in this biotope as is the encrusting polychaete Pomatoceros triqueter. Similar communities have been found on cobble and pebble plains in stable, undisturbed conditions in some sealochs, although not all these examples have Modiolus beds.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A5.624
Bern Convention Included in a Resolution 4 habitat type at a higher level (A5)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Antedon bifida
Invertebrates Ascidiella aspersa
Invertebrates Chlamys varia
Invertebrates Ciona intestinalis
Invertebrates Corella parallelogramma
Invertebrates Kirchenpaueria pinnata
Invertebrates Modiolus modiolus
Invertebrates Ophiothrix fragilis
Invertebrates Pomatoceros triqueter
Species scientific name English common name Species group
Antedon bifida Invertebrates
Ascidiella aspersa Invertebrates
Chlamys varia Invertebrates
Ciona intestinalis Invertebrates
Corella parallelogramma Invertebrates
Kirchenpaueria pinnata Invertebrates
Modiolus modiolus Invertebrates
Ophiothrix fragilis Invertebrates
Pomatoceros triqueter Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 SS.SBR.SMus.ModCvar <I>Modiolus modiolus</I> beds with <I>Chlamys varia</I>, sponges, hydroids and bryozoans on slightly tide-swept very sheltered circalittoral mixed substrata source
CORINE Land Cover 5.2.3. Sea and ocean n/a
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 200410 A5.624 Modiolus modiolus beds with Chlamys varia, sponges, hydroids and bryozoans on slightly tide-swept very sheltered circalittoral mixed substrata same
EUNIS Habitat Classification 200308 A3.721 Modiolus modiolus beds with Chlamys varia, sponges, hydroids and bryozoans on slightly tide-swept very sheltered circalittoral mixed substrata same
EUNIS Habitat Classification 200202 A3.721 Modiolus modiolus beds with Chlamys varia, sponges, hydroids and bryozoans on slightly tide-swept very sheltered circalittoral mixed substrata same
EUNIS Habitat Classification 199910 A3.721 Modiolus modiolus beds with Chlamys varia, sponges, hydroids and bryozoans on slightly tide-swept very sheltered circalittoral mixed substrata same
MNCR BioMar 97.06 (Britain & Ireland) SCR.Mod.ModCvar Modiolus modiolus beds with Chlamys varia, sponges, hydroids and bryozoans on slightly tide-swept very sheltered circalittoral mixed substrata same
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