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CR.MCR.SfR.Hia
Hiatella-bored vertical sublittoral limestone rock

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Habitat (physical) description

Distribution

 Salinity: Full (30-35 ppt) 
 Wave exposure: Moderately exposed 
 Tidal streams: Moderately strong (1-3 kn), Weak (>1 kn), Very weak (negligible) 
 Substratum: Bedrock 
 Zone: Circalittoral 
 Depth Band: 0-5 m, 5-10 m, 10-20 m 
 Other Features: Vertical limestone or chalk. 

Download comparative physical and biological data. The comparative tables enable a rapid comparison of the species composition and principal physical characteristics between a given set of biotopes.
Distribution of habitat CR.MCR.SfR.Hia  Hiatella-bored vertical sublittoral limestone rock
Distribution of habitat CR.MCR.SfR.Hia Hiatella-bored vertical sublittoral limestone rock, based on records on the UK Marine Recorder database and EUSeaMap. Red dots represent records on which the biotope is based. Blue dots show other certain records, black dots show records tentatively assigned to this biotope. Yellow areas show level 2 and 3 sublittoral and deep-sea habitats prediced by EUSeaMap within UK waters.

Biotope description

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.

Situation

No situation data available.

Temporal variation

No temporal variation data available.

Similar biotopes

IR.MIR.KR.HiaSwHas seaweed community.

Characterising Species

Taxa Frequency Typical Abundance % Contribution to similarity
Leucosolenia botryoides F 2
Cliona celata F 2
Halichondria panicea F 2
Myxilla incrustans O 1
Dysidea fragilis P 1
Nemertesia antennina F 1
Alcyonium digitatum C 3
Sabellaria spinulosa F 1
Cancer pagurus O 2
Janolus cristatus F 2
Hiatella arctica C 7
Crisiidae C 5
Alcyonidium diaphanum F 3
Flustra foliacea C 2
Bugula flabellata F 2
Bugula plumosa F 4
Cellepora pumicosa O 1
Henricia sanguinolenta O 2
Asterias rubens F 9
Ophiothrix fragilis C 10
Clavelina lepadiformis F 2
Polyclinum aurantium F 5
Aplidium punctum C 2
Botryllus schlosseri O 2
Botrylloides leachi F 4
Delesseria sanguinea F 2

Example photographs of biotope

No characteristic photos currently available. If you are able to provide a photograph of this biotope please contact .


Version 15.03 of the classification adds a deep-sea section to version 04.05; therefore superseding version 04.05, 97.06 and 03.02.

This online classification should be cited as:

JNCC (2015) The Marine Habitat Classification for Britain and Ireland Version 15.03 [Online]. [Date accessed]. Available from: jncc.defra.gov.uk/MarineHabitatClassification

Information from the shallower section (up to sublittoral sediment, taken from Version 04.05) be cited as the report accompanying Version 04.05, as follows:

CONNOR, D.W., J.H. ALLEN, N.GOLDING, K.L.HOWELL, L.M. LIEBERKNECHT, K.O. NORTHEN AND J.B. REKER (2004) The Marine Habitat Classification for Britain and Ireland Version 04.05. In: JNCC (2015) The Marine Habitat Classification for Britain and Ireland Version 15.03 [Online]. [Date accessed].
Available from: jncc.defra.gov.uk/MarineHabitatClassification
ISBN 1 861 07561 8


Information from the deep-sea section (added in March 2015) should be cited as the report accompanying the deep-sea section, as follows:

PARRY, M.E.V., K.L. HOWELL, B.E. NARAYANASWAMY, B.J. BETT, D.O.B. JONES, D.J. HUGHES, N. PIECHAUD, T.D. NICKELL, H. ELLWOOD, N. ASKEW, C. JENKINS and E. MANCA (2015) A Deep-sea Section for the Marine Habitat Classification of Britain and Ireland. JNCC report 530. In: JNCC (2015) The Marine Habitat Classification for Britain and Ireland Version 15.03 [Online]. [Date accessed].
Available from: jncc.defra.gov.uk/MarineHabitatClassification
ISSN 0963 8901