Mussel beds on circalittoral rock

English name: Mussel beds on circalittoral rock

Description (English)

This habitat type occurs on moderately wave-exposed upper circalittoral bedrock subject to strong or moderately strong tidal streams. This complex is characterised by dense aggregations of the mussels Mytilus edulis or Musculus discors carpeting the underlying substrata. Sponges that may be recorded in this complex are Scypha ciliata, Tethya aurantium, Pachymatisma johnstonia, Dysidea fragilis and Cliona celata. A sparse hydroid/bryozoan turf composed primarily of Nemertesia antennina, Alcyonidium diaphanum and Flustra foliacea is often recorded. Anemones present are Urticina felina and Sagartia elegans. Other species recorded are the crabs Cancer pagurus, Carcinus maenas and Necora puber, the starfish Crossaster papposus and Asterias rubens, and Alcyonium digitatum and in this upper circalittoral complex, algae species such as Dictyota dichotoma, Cryptopleura ramosa and Plocamium cartilagineum.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A4.24
Bern Convention Included in a Resolution 4 habitat type at a higher level (A4)
Relation to Annex I habitat types (EU Habitats Directive)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Algae Cryptopleura ramosa
Algae Dictyota dichotoma
Algae Plocamium cartilagineum
Invertebrates Alcyonidium diaphanum
Invertebrates Alcyonium digitatum
Invertebrates Asterias rubens
Invertebrates Cancer pagurus
Invertebrates Carcinus maenas
Invertebrates Cliona celata
Invertebrates Crossaster papposus
Invertebrates Dysidea fragilis
Invertebrates Flustra foliacea
Invertebrates Musculus discors
Invertebrates Mytilus edulis
Invertebrates Necora puber
Invertebrates Nemertesia antennina
Invertebrates Pachymatisma johnstonia
Invertebrates Sagartia elegans
Invertebrates Tethya aurantium
Invertebrates Urticina felina
Species scientific name English common name Species group
Cryptopleura ramosa Algae
Dictyota dichotoma Algae
Plocamium cartilagineum Algae
Alcyonidium diaphanum Invertebrates
Alcyonium digitatum Invertebrates
Asterias rubens Invertebrates
Cancer pagurus Invertebrates
Carcinus maenas Invertebrates
Cliona celata Invertebrates
Crossaster papposus Invertebrates
Dysidea fragilis Invertebrates
Flustra foliacea Invertebrates
Musculus discors Invertebrates
Mytilus edulis Invertebrates
Necora puber Invertebrates
Nemertesia antennina Invertebrates
Pachymatisma johnstonia Invertebrates
Sagartia elegans Invertebrates
Tethya aurantium Invertebrates
Urticina felina Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 CR.MCR.CMus Circalittoral mussel beds on rock source
Palaearctic Habitat Classification 200112 11.254 Mussel beds wider
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 A4.24 Mussel beds on circalittoral rock same
EUNIS Habitat Classification 200308 A3.64 Mussel beds on circalittoral rock same
EUNIS Habitat Classification 200202 A3.64 Mussel beds on moderately exposed circalittoral rock same
EUNIS Habitat Classification 199910 A3.64 Mussel beds on moderately exposed circalittoral rock same
EUNIS Habitat Classification 199811 A3.65 Mussel beds on moderately exposed circalittoral rock same
EUNIS Habitat Classification 199712 A5.25 Mussel beds on moderately exposed circalittoral rock same
Palaearctic Habitat Classification 199905 11.254 Part of Mussel beds narrower
Palaearctic Habitat Classification 1997 11.254 Part of Mussel beds narrower
Palaearctic Habitat Classification 1996 11.254   narrower
Palaearctic Habitat Classification 1993 11.254   narrower
CORINE Biotopes Classification 1991 11.254   narrower
MNCR BioMar 97.06 (Britain & Ireland) MCR.M Mussel beds (open coast circalittoral rock/mixed substrata) same
MNCR BioMar 96.7 (Britain & Ireland) MCR.M   same
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