Brachiopod and ascidian communities on circalittoral rock

English name: Brachiopod and ascidian communities on circalittoral rock

Description (English)

This habitat type occurs on the wave-sheltered, circalittoral bedrock and boulders subject to weak tidal streams. The biotopes within this complex are typically found in the Scottish sealochs (with the exception of A4.312, recorded off Ireland) and are characterised by brachipod and ascidian communities. Ascidians often recorded in this complex are Ciona intestinalis, Ascidia mentula, Ascidia virginea and Clavelina lepadiformis. The brachiopod Neocrania anomala is also characteristic of the biotopes within this complex recorded in Scottish sealochs. The polychaete Pomatoceros triqueter, the saddle oyster Pododesmus patelliformis, the cup coral Caryophyllia smithii and encrusting red algae are frequently recorded on the rocky substrata. Echinoderms such as the brittlestars Ophiothrix fraglis, Ophiocomina nigra and Ophiura albida, the starfish Asterias rubens, Crossaster papposus and Henricia oculata, the crinoid Antedon bifida and the urchin Echinus esculentus are all found in this complex. Other species present include the squat lobster Munida rugosa, the hermit crab Pagurus bernhardus, Alcyonium digitatum, the anemone Protanthea simplex and the hydroid Kirchenpaueria pinnata.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A4.31
Bern Convention Included in a Resolution 4 habitat type at a higher level (A4)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Alcyonium digitatum
Invertebrates Antedon bifida
Invertebrates Ascidia mentula
Invertebrates Ascidia virginea
Invertebrates Asterias rubens
Invertebrates Caryophyllia smithii
Invertebrates Ciona intestinalis
Invertebrates Clavelina lepadiformis
Invertebrates Crossaster papposus
Invertebrates Echinus esculentus
Invertebrates Henricia oculata
Invertebrates Kirchenpaueria pinnata
Invertebrates Munida rugosa
Invertebrates Neocrania anomala
Invertebrates Ophiocomina nigra
Invertebrates Ophiura albida
Invertebrates Pagurus bernhardus
Invertebrates Pododesmus patelliformis
Invertebrates Pomatoceros triqueter
Invertebrates Protanthea simplex
Species scientific name English common name Species group
Alcyonium digitatum Invertebrates
Antedon bifida Invertebrates
Ascidia mentula Invertebrates
Ascidia virginea Invertebrates
Asterias rubens Invertebrates
Caryophyllia smithii Invertebrates
Ciona intestinalis Invertebrates
Clavelina lepadiformis Invertebrates
Crossaster papposus Invertebrates
Echinus esculentus Invertebrates
Henricia oculata Invertebrates
Kirchenpaueria pinnata Invertebrates
Munida rugosa Invertebrates
Neocrania anomala Invertebrates
Ophiocomina nigra Invertebrates
Ophiura albida Invertebrates
Pagurus bernhardus Invertebrates
Pododesmus patelliformis Invertebrates
Pomatoceros triqueter Invertebrates
Protanthea simplex Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 CR.LCR.BrAs Brachiopod and ascidian communities 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 A4.31 Brachiopod and ascidian communities on circalittoral rock same
EUNIS Habitat Classification 200308 A3.71 Brachiopod and ascidian communities on circalittoral rock same
EUNIS Habitat Classification 200202 A3.71 Brachiopods and solitary ascidian communities on sheltered circalittoral rock same
EUNIS Habitat Classification 199910 A3.71 Brachiopods and solitary ascidian communities on sheltered circalittoral rock same
EUNIS Habitat Classification 199811 A3.71 Mixed fauna on silty algal-encrusted circalittoral rock same
EUNIS Habitat Classification 199712 A5.31 Mixed fauna on silty algal-encrusted circalittoral rock same
MNCR BioMar 97.06 (Britain & Ireland) SCR.BrAs Brachiopods and solitary ascidian communities (sheltered rock) same
MNCR BioMar 96.7 (Britain & Ireland) SCR.FaAlc   narrower
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