Concept
Osmundea (Laurencia) pinnatifida and Gelidium pusillum on moderately exposed mid eulittoral rock
| URI | http://vocab.nerc.ac.uk/collection/M24/current/LRMLRROSM/ | |
|---|---|---|
| Within Vocab | Marine Habitat Classification for Britain and Ireland Version 97.06 | |
| Alternative Labels | LR.MLR.R.Osm | |
| Definition | Exposed to moderately exposed lower eulittoral rock may be characterised by extensive areas or a distinct band of Osmundea (Laurencia) 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 algae, such as Ceramium spp. and Callithamnion hookeri may be present, although Osmundea and/or Gelidium always dominate. On flatter, more sheltered shores, Laurencia hybrida may also occur. Small patches of bare rock amongst the algal turf are occupied by barnacles Semibalanus balanoides, the limpet Patella vulgata, dog whelks Nucella lapillus and small mussels Mytilus edulis. A variation of this biotope has been described for the chalk platforms in Kent where extensive turfs of Gelidium pusillum occur in the mid eulittoral above the main Osmundea zone. | |
| Date | 2019-11-26T11:41:44 | |
| Identifier | SDN:M24::LRMLRROSM | |
| Note | accepted | |
| Has Current Version | 1 | |
| version | 1 | |
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