EUNIS habitat classification 2012 amended 2019 > A - Marine habitats > A1 - Littoral rock and other hard substrata > A1.1 - High energy littoral rock > A1.12 - Robust fucoid and/or red seaweed communities > A1.126 - Osmundea pinnatifida on moderately exposed mid eulittoral rock

Osmundea pinnatifida on moderately exposed mid eulittoral rock

English name: 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 (A1.112; A1 122; A1.411). It is found above biotopes dominated by the wrack Fucus serratus and red seaweeds (A1.12; A1.222; A1.2141) or above biotopes dominated by the kelp Laminaria digitata (A3.2111).

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A1.126

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Algae Corallina officinalis
Algae Fucus serratus
Algae Gelidium pusillum
Algae Laminaria digitata
Invertebrates Littorina littorea
Invertebrates Littorina saxatilis
Invertebrates Mytilus edulis
Invertebrates Nucella lapillus
Algae Osmundea hybrida
Algae Osmundea pinnatifida
Algae Palmaria palmata
Invertebrates Patella vulgata
Invertebrates Semibalanus balanoides
Species scientific name English common name Species group
Corallina officinalis Algae
Fucus serratus Algae
Gelidium pusillum Algae
Laminaria digitata Algae
Littorina littorea Invertebrates
Littorina saxatilis Invertebrates
Mytilus edulis Invertebrates
Nucella lapillus Dog whelk Invertebrates
Osmundea hybrida Algae
Osmundea pinnatifida Algae
Palmaria palmata Algae
Patella vulgata Invertebrates
Semibalanus balanoides Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 LR.HLR.FR.Osm <I>Osmundea pinnatifida</I> on moderately exposed mid eulittoral rock source
CORINE Land Cover 4.2.3. Intertidal flats n/a
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type
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
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