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Marine Habitat Classification


Description of biotope or habitat type

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   Corallina officinalis, Himanthalia elongata and Patella ulyssiponensis on very exposed lower eulittoral rock


Habitat (physical) description

Salinity Full (30-35 ppt)
Wave exposure Very exposed, Exposed
Tidal streams
Substratum Bedrock
Zone Eulittoral - lower
Depth Band Lower shore
Other Features

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 LR.HLR.FR.Coff.Puly <I>Corallina officinalis</I>, <I>Himanthalia elongata</I> and <I>Patella ulyssiponensis</I> on very exposed lower eulittoral rock

  • Records used to define the biotope (core records)
  • Other records assigned to this biotope, marked as 'certain'
  • Other records assigned to this biotope, marked as 'uncertain'

Point data based on records in the UK Marine Recorder Snapshot.

Description

Very exposed to exposed lower eulittoral bedrock shores in the south-west can support a dense turf of the red seaweed Corallina officinalis found underneath the long erect fronds of the wrack Himanthalia elongata. The rock surface is pitted with the limpet Patella ulyssiponensis. Also found on the bedrock is the barnacle Chthamalus stellatus or the limpet Patella vulgata, while numerous cracks and crevices provide shelter for anemones such as Actinia equina or the mussel Mytilus edulis. Other turf-forming red seaweeds include Lomentaria articulata, Mastocarpus stellatus, Palmaria palmata, Gastroclonium ovatum, Ceramium spp. and Osmundea pinnatifida which can be found along with the kelp Laminaria digitata. Foliose green seaweeds such as Enteromorpha intestinalis and Ulva lactuca may also be present along with siphonous Codium spp. Sponges such as Grantia compressa, Halichondria panicea and Hymeniacidon perleve may be present in shaded areas. The brown seaweed Bifurcaria bifurcata and the barnacle Balanus perforatus may occur in the extreme south-west.

Situation

This community usually forms a distinct band just above the kelp zone (Ala; Ala.Ldig or Ldig). It can be found below the barnacle and P. vulgata dominated biotopes (Cht; Sem or Sem.FvesR).

Temporal variation

There might be some fluctuations in the abundance of the individual species from year to year, which reverts this biotope into either the Coff.Coff or the Him biotopes.

Characterising Species

Taxon Relative importance of taxon for defining this community (%) Typical abundance - SACFOR scale % of core records where taxon was recorded
Actinia equina 4 Occasional 61-80 %
Chthamalus stellatus 3 Common 41-60 %
Patella ulyssiponensis 13 Common 81-100 %
Patella vulgata 2 Frequent 21-40 %
Mytilus edulis 2 Frequent 41-60 %
Porphyra umbilicalis 1 Occasional 21-40 %
Palmaria palmata 2 Occasional 41-60 %
Corallinaceae 3 Common 41-60 %
Corallina officinalis 14 Common 81-100 %
Chondrus crispus 2 Occasional 41-60 %
Mastocarpus stellatus 6 Occasional 61-80 %
Gastroclonium ovatum 1 Occasional 41-60 %
Lomentaria articulata 2 Occasional 41-60 %
Ceramium 3 Occasional 41-60 %
Osmundea pinnatifida 8 Frequent 81-100 %
Laminaria digitata 2 Occasional 61-80 %
Himanthalia elongata 10 Abundant 61-80 %
Enteromorpha intestinalis 3 Occasional 61-80 %
Ulva lactuca 1 Occasional 41-60 %
Codium 1 Occasional 21-40 %

Similar biotopes

LR.HLR.FR.Coff.Coff
Occurs on moderately exposed to exposed coasts, but otherwise similar physical conditions. The biotope is dominated by C. officinalis while H. elongata is not present in high abundance (Frequent). C. stellatus is usually absent.

LR.HLR.FR.Him
Occurs in similar physical conditions. H. elongata is always present in high abundance (Common) while C. officinalis is not dominating (Frequent). C. stellatus and P. ulyssiponensis are usually absent.

Biotope history

Classification Habitat code
97.06 ELR.Coff in part

Photos

LR.HLR.FR.Coff.Puly Corallina officinalis, Himanthalia elongata and Patella ulyssiponensis on very exposed lower eulittoral rock, Emblestone Transect, Seahouses. Judy Foster-Smith © JNCC
LR.HLR.FR.Coff.Puly Corallina officinalis, Himanthalia elongata and Patella ulyssiponensis on very exposed lower eulittoral rock, Emblestone Transect, Seahouses. Judy Foster-Smith © JNCC

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