Osmundea pinnatifida on moderately exposed mid eulittoral rock
Description (English)
Exposed to moderately exposed lower eulittoral rock characterised by extensive areas or a distinct band of Osmundea pinnatifida and Gelidium pusillum (either together or separately). This community usually occurs on shores on which a fucoid canopy is reduced in extent, or even absent. Other turf-forming red seaweeds, such as Corallina officinalis, Mastocarpus stellatus, Ceramium spp. and Callithamnion hookeri may be present, although O. pinnatifida always dominate. On flatter, more sheltered shores, Osmundea hybrida may also occur. Small patches of bare rock amongst the algal turf are occupied by barnacles Semibalanus balanoides, the limpet Patella vulgata, the whelk Nucella lapillus and small individuals of the mussel Mytilus edulis. The winkles Littorina littorea and Littorina saxatilis can be present on the rock or among the seaweeds. A variation of this biotope has been described for the chalk platforms in Kent where extensive turfs of G. pusillum occur in the mid eulittoral above the main O. pinnatifida zone.
Situation: This biotope can be found below barnacles S. balanoides or red seaweed dominated community, which includes the species Palmaria palmata, C. officinalis or M. stellatus (MA1-222; MA1-232; MA1-262). It is found above biotopes dominated by the wrack Fucus serratus and red seaweeds (MA1-23; MA1-247; MA1-2441) or above biotopes dominated by the kelp Laminaria digitata (MB1-2171).
Source: EUNIS habitat classification
Quick facts
EUNIS habitat type | code MA1236 |
---|---|
Relation to | Resolution 4 habitat type (used for designation of Emerald sites) |
Legal status
Relation to other habitat types mentioned in legal instruments
Vegetation types
Relation to vegetation types (syntaxa)
Not availableSpecies mentioned in habitat description
Species scientific name | English common name | Species group |
---|---|---|
Corallina officinalis | Algae | |
Fucus serratus | Algae | |
Gelidium pusillum | Algae | |
Laminaria digitata | Algae | |
Mastocarpus stellatus | Algae | |
Osmundea hybrida | Algae | |
Osmundea pinnatifida | Algae | |
Palmaria palmata | Algae | |
Littorina littorea | Invertebrates | |
Littorina saxatilis | Invertebrates | |
Mytilus edulis | Invertebrates | |
Nucella lapillus | Dog whelk | Invertebrates |
Patella vulgata | Invertebrates | |
Semibalanus balanoides | Invertebrates |
Other classifications
Classification | Code | Habitat type name | Relationship type |
---|---|---|---|
EUNIS Habitat Classification 2007 (revised descriptions 2012) | A1.126 | Osmundea pinnatifida on moderately exposed mid eulittoral rock | same |
History
Classification | Code | Habitat type name | Relationship type | Comment |
---|---|---|---|---|
EUNIS Habitat Classification 200410 | A1.126 | Osmundea pinnatifida on moderately exposed mid eulittoral rock | same | |
EUNIS Habitat Classification 200308 | A1.234 | Osmundea pinnatifida on moderately exposed mid eulittoral rock | same | |
EUNIS Habitat Classification 200202 | A1.234 | Osmundea (Laurencia) pinnatifida and Gelidium pusillum on moderately exposed mid eulittoral rock | same | |
EUNIS Habitat Classification 199910 | A1.224 | Osmundea (Laurencia) pinnatifida and Gelidium pusillum on moderately exposed mid eulittoral rock | same | |
MNCR BioMar 97.06 (Britain & Ireland) | MLR.R.Osm | Osmundea (Laurencia) pinnatifida and Gelidium pusillum on moderately exposed mid eulittoral rock | same |