EUNIS habitat classification 2012 amended 2019 > A - Marine habitats > A5 - Sublittoral sediment > A5.4 - Sublittoral mixed sediments > A5.44 - Circalittoral mixed sediments > A5.442 - Sparse Modiolus modiolus, dense Cerianthus lloydii and burrowing holothurians on sheltered circalittoral stones and mixed sediment

Sparse Modiolus modiolus, dense Cerianthus lloydii and burrowing holothurians on sheltered circalittoral stones and mixed sediment

English name: Sparse Modiolus modiolus, dense Cerianthus lloydii and burrowing holothurians on sheltered circalittoral stones and mixed sediment

Description (English)

Pebbles and cobbles on mud or muddy gravel in sealochs with frequent Cerianthus lloydii and occasional Modiolus modiolus. Large burrowing holothurians may include Psolus phantapus, Paracucumaria hyndmani, Thyonidium commune, Thyone fusus and Leptopentacta elongate. Many of these species only extend their tentacles above the sediment surface seasonally and are likely to be under recorded by epifaunal surveys. Other more conspicuous characterising taxa include Pagurus bernhardus, Asterias rubens, and Buccinum undatum. This biotope is well developed in the Clyde sealochs, although many examples are rather species-poor. Some examples in south-west Scottish sealochs have greater quantities of boulders and cobbles and therefore have a richer associated biota (compared with other sheltered Modiolus bed biotopes such as A5.623). Examples in Shetland are somewhat different in having the cucumber Cucumaria frondosa amongst sparse Modiolus beds and a slightly different balance in abundance of other species; for example the brittlestar Ophiopholis aculeata is more abundant in these far northern examples in the voes and narrows

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A5.442
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 Asterias rubens
Invertebrates Buccinum undatum
Invertebrates Cucumaria frondosa
Invertebrates Modiolus modiolus
Invertebrates Ophiopholis aculeata
Invertebrates Pagurus bernhardus
Invertebrates Psolus phantapus
Invertebrates Thyone fusus
Species scientific name English common name Species group
Asterias rubens Invertebrates
Buccinum undatum Invertebrates
Cucumaria frondosa Invertebrates
Modiolus modiolus Invertebrates
Ophiopholis aculeata Invertebrates
Pagurus bernhardus Invertebrates
Psolus phantapus Invertebrates
Thyone fusus Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 SS.SMx.CMx.ClloModHo Sparse <I>Modiolus modiolus</I>, dense <I>Cerianthus lloydii</I> and burrowing holothurians on sheltered circalittoral stones and mixed sediment source
CORINE Land Cover 5.2.3. Sea and ocean n/a
Biodiversity Action Plan Priority Habitats (UK) 38 Modiolus modiolus beds wider
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 200410 A5.442 Sparse Modiolus modiolus, dense Cerianthus lloydii and burrowing holothurians on sheltered circalittoral stones and mixed sediment same
EUNIS Habitat Classification 200308 A4.443 Sparse Modiolus modiolus, dense Cerianthus lloydii and burrowing holothurians on sheltered circalittoral stones and mixed sediment same
EUNIS Habitat Classification 200202 A4.443 Sparse Modiolus modiolus, dense Cerianthus lloydii and burrowing holothurians on sheltered circalittoral stones and mixed sediment same
EUNIS Habitat Classification 199910 A4.493 Sparse Modiolus modiolus, dense Cerianthus lloydii and burrowing holothurians on sheltered circalittoral stones and mixed sediment same
MNCR BioMar 97.06 (Britain & Ireland) CMX.ModHo Sparse Modiolus modiolus, dense Cerianthus lloydii and burrowing holothurians on sheltered circalittoral stones and mixed sediment same
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