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LR.FLR.Rkp.Cor
Coralline crust-dominated shallow eulittoral rockpools

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Habitat (physical) description

Distribution

 Salinity: Full (30-35 ppt) 
 Wave exposure: Very exposed, Exposed, Moderately exposed, Sheltered 
 Tidal streams:  
 Substratum: Bedrock; boulders 
 Zone: Eulittoral, Littoral fringe 
 Depth Band: Mid shore, Upper shore 
 Other Features: Rockpool 

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.

Previous code

This biotope occurred in previous versions of the classification as:
Includes RKP.Gas - Version: 96.7

Distribution of habitat LR.FLR.Rkp.Cor  Coralline crust-dominated shallow eulittoral rockpools
Distribution of habitat LR.FLR.Rkp.Cor Coralline crust-dominated shallow eulittoral rockpools, 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

Shallow and smaller rockpools throughout the eulittoral zone in a wide range of wave exposures characterised by a covering of encrusting coralline algae on which Corallina officinalis often forms a dense turf. The bottom of these pools can be covered in coarse gravel and cobbles. These 'coralline' pools have a striking appearance as they are dominated by red seaweeds. Foliose red seaweeds found in these pools include Mastocarpus stellatus, Chondrus crispus and the filamentous Ceramium nodulosum. The ephemeral green seaweeds Cladophora rupestris, Ulva lactuca and Enteromorpha spp. can also occur in high abundance. The pools may hold large numbers of grazing molluscs, particularly the winkle Littorina littorea (which often occur in exceptionally high densities in upper shore pools) and the limpet Patella vulgata. Gastropods may graze these pools to such an extent that they is devoid of any foliose red seaweeds, and the flora are reduced to encrusting coralline algae and large numbers of gastropods. Large brown seaweeds are generally absent. Within the pools, pits and crevices are often occupied by the anemone Actinia equina and small individuals of the mussel Mytilus edulis. The whelk Nucella lapillus can be found on the rock surface preying on the barnacles and mussels. A number of variants have been identified. Pools dominated by coralline algae and foliose red seaweeds with a distribution throughout the UK (see Cor.Cor). In Ireland, the sea urchin Paracentrotus lividus can dominate these shallow coralline pools (see Cor.Par). In south-west Britain, the brown seaweed Bifurcaria bifurcata (Cor.Bif) or Cystoseira spp. (Cor.Cys) can be regionally dominant.

Situation

Rockpools throughout the eulittoral and lower littoral fringe on rocky shores.

Temporal variation

No temporal variation data available.

Similar biotopes

Not applicable or unknown.

Characterising Species

Taxa Frequency Typical Abundance % Contribution to similarity
Actinia equina O 4
Patella vulgata F 6
Littorina littorea C 6
Nucella lapillus O 1
Mytilus edulis O 2
Corallinaceae A 26
Corallina officinalis C 23
Chondrus crispus O 1
Mastocarpus stellatus O 1
Ceramium nodulosum F 2
Enteromorpha intestinalis F 7
Ulva lactuca O 3
Cladophora O 1

Example photographs of biotope


Pool in Pelvetia zone Corallina officinalis and coralline crusts, NE of Idrigill Point, Loch Bracadale, Skye., David Connor, © JNCC Ceramium rubrum and Corallina in shallow pool, Thannaf Point, Keith Hiscock, © JNCC
Click on an image for a larger view


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