Hiatella-bored vertical sublittoral limestone rock

English name: Hiatella-bored vertical sublittoral limestone rock

Description (English)

Moderately exposed vertical and overhanging soft rock (typically chalk), subject to moderately strong to weak tidal streams, bored by the rock-boring mollusc Hiatella arctica. As with other biotopes in the soft rock complex, it is found in areas of high turbidity, where there is poor light penetration. There may be isolated clumps of the hydroid Nemertesia antennina and a sparse bryozoan turf formed by various crisiids, Bugula plumosa and Bugula flabellate (often being grazed on by the nudibranch Janolus cristatus), Alcyonidium diaphanum, Flustra foliacea and Cellapora pumicosa. A patchy 'carpet' of the brittlestar Ophiothrix fragilis is often recorded along with other echinoderms such as Asterias rubens and Henricia sanguinolenta. Other species present include the colonial ascidians Polyclinum aurantium, Botrylloides leachi, Clavelina lepadiformis, Aplidium punctatum and Botryllus schlosseri, dead mans fingers Alcyonium digitatum and the crab Cancer pagurus. Sponges present include the boring sponge Cliona celata, Halichondria panicea, Myxilla incrustans, Leucosolenia botryoidesand Dysidea fragilis. Occasionally, the foliose red seaweed Delessaria sanguinea may be recorded.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A4.233
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 Alcyonidium diaphanum
Invertebrates Alcyonium digitatum
Invertebrates Asterias rubens
Invertebrates Botrylloides leachi
Invertebrates Botryllus schlosseri
Invertebrates Bugula plumosa
Invertebrates Cancer pagurus
Invertebrates Clavelina lepadiformis
Invertebrates Cliona celata
Invertebrates Dysidea fragilis
Invertebrates Flustra foliacea
Invertebrates Halichondria panicea
Invertebrates Henricia sanguinolenta
Invertebrates Hiatella arctica
Invertebrates Janolus cristatus
Invertebrates Leucosolenia botryoides
Invertebrates Myxilla incrustans
Invertebrates Nemertesia antennina
Invertebrates Ophiothrix fragilis
Invertebrates Polyclinum aurantium
Species scientific name English common name Species group
Alcyonidium diaphanum Invertebrates
Alcyonium digitatum Invertebrates
Asterias rubens Invertebrates
Botrylloides leachi Invertebrates
Botryllus schlosseri Invertebrates
Bugula plumosa Invertebrates
Cancer pagurus Invertebrates
Clavelina lepadiformis Invertebrates
Cliona celata Invertebrates
Dysidea fragilis Invertebrates
Flustra foliacea Invertebrates
Halichondria panicea Invertebrates
Henricia sanguinolenta Invertebrates
Hiatella arctica Invertebrates
Janolus cristatus Invertebrates
Leucosolenia botryoides Invertebrates
Myxilla incrustans Invertebrates
Nemertesia antennina Invertebrates
Ophiothrix fragilis Invertebrates
Polyclinum aurantium Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 CR.MCR.SfR.Hia <I>Hiatella</I>-bored vertical sublittoral limestone 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 A4.233 Hiatella-bored vertical sublittoral limestone rock same
EUNIS Habitat Classification 200308 A3.2411 Hiatella arctica, bryozoans and ascidians on vertical infralittoral soft rock overlap
EUNIS Habitat Classification 200202 A3.2411 Hiatella arctica, bryozoans and ascidians on vertical infralittoral soft rock overlap
EUNIS Habitat Classification 199910 A3.2411 Hiatella arctica, bryozoans and ascidians on vertical infralittoral soft rock overlap
MNCR BioMar 97.06 (Britain & Ireland) IR.FaSwV.AlcByH.Hia Hiatella arctica, bryozoans and ascidians on vertical infralittoral soft rock overlap
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