Sabellaria spinulosa encrusted circalittoral rock

English name: Sabellaria spinulosa encrusted circalittoral rock

Quick facts

EUNIS habitat type code A4.221
Bern Convention Included in a Resolution 4 habitat type at a higher level (A4)

Description (English)

This biotope is typically found encrusting the upper faces of wave-exposed and moderately wave-exposed circalittoral bedrock, boulders and cobbles subject to strong/moderately strong tidal streams in areas with high turbidity. The crusts formed by the sandy tubes of the polychaete worm Sabellaria spinulosa may even completely cover the rock, binding the substratum together to form a crust. A diverse fauna may be found attached to, and sometimes obscuring the crust, often reflecting the character of surrounding biotopes. Bryozoans such as Flustra foliacea, Pentapora foliacea and Alcyonidium diaphanum, anemones such as Urticina felina and Sagartia elegans, the polychaete Pomatoceros triqueter, Alcyonium digitatum, the hydroid Nemertesia antennina and echinoderms such as Asterias rubens and Crossaster papposus may all be recorded within this biotope. There are two variants. The first (unit A4.2211) contains significant cover of barnacles (Balanus crenatus) and bryozoans. The second (unit A4.2212) has a dense turf of didemnid ascidians as well as scour-tolerant bryozoans such as F. foliacea, sponges such as Tethya aurantium and Phorbas fictitius, colonies of the serpulid worm Salmacina dysteri and patchy occurrences of the ascidians Distomus variolosus, Polycarpa pomaria and Polycarpa scuba. This biotope has been recorded from the Lleyn Peninsula, Lundy Island (including the wreck of the MV Robert) and the north-east and south coast of England.

Source: EUNIS habitat classification

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Alcyonidium diaphanum
Invertebrates Alcyonium digitatum
Invertebrates Asterias rubens
Invertebrates Balanus crenatus
Invertebrates Crossaster papposus
Invertebrates Distomus variolosus
Invertebrates Flustra foliacea
Invertebrates Nemertesia antennina
Invertebrates Phorbas fictitius
Invertebrates Polycarpa pomaria
Invertebrates Polycarpa scuba
Invertebrates Pomatoceros triqueter
Invertebrates Sabellaria spinulosa
Invertebrates Sagartia elegans
Invertebrates Salmacina dysteri
Invertebrates Tethya aurantium
Invertebrates Urticina felina
Species scientific name English common name Species group
Alcyonidium diaphanum Invertebrates
Alcyonium digitatum Invertebrates
Asterias rubens Invertebrates
Balanus crenatus Invertebrates
Crossaster papposus Invertebrates
Distomus variolosus Invertebrates
Flustra foliacea Invertebrates
Nemertesia antennina Invertebrates
Phorbas fictitius Invertebrates
Polycarpa pomaria Invertebrates
Polycarpa scuba Invertebrates
Pomatoceros triqueter Invertebrates
Sabellaria spinulosa Invertebrates
Sagartia elegans Invertebrates
Salmacina dysteri Invertebrates
Tethya aurantium Invertebrates
Urticina felina Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 CR.MCR.CSab.Sspi <I>Sabellaria spinulosa</I> encrusted circalittoral rock 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 A4.221 Sabellaria spinulosa encrusted circalittoral rock same
EUNIS Habitat Classification 200308 A3.631 Sabellaria spinulosa with a bryozoan turf and barnacles on silty turbid circalittoral rock same
EUNIS Habitat Classification 200202 A3.631 Sabellaria spinulosa crusts on silty turbid circalittoral rock same
EUNIS Habitat Classification 199910 A3.631 Sabellaria spinulosa crusts on silty turbid circalittoral rock same
MNCR BioMar 97.06 (Britain & Ireland) MCR.CSab.Sspi Sabellaria spinulosa crusts on silty turbid circalittoral rock same
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