EUNIS habitat classification 2012 amended 2019 > A - Marine habitats > A1 - Littoral rock and other hard substrata > A1.1 - High energy littoral rock > A1.11 - Mussel and/or barnacle communities > A1.113 - Semibalanus balanoides on exposed to moderately exposed or vertical sheltered eulittoral rock > A1.1131 - Semibalanus balanoides, Patella vulgata and Littorina spp. on exposed to moderately exposed or vertical sheltered eulittoral rock

Semibalanus balanoides, Patella vulgata and Littorina spp. on exposed to moderately exposed or vertical sheltered eulittoral rock

English name: Semibalanus balanoides, Patella vulgata and Littorina spp. on exposed to moderately exposed or vertical sheltered eulittoral rock

Quick facts

EUNIS habitat type code A1.1131
Bern Convention Included in a Resolution 4 habitat type at a higher level (A1.11)

Description (English)

Very exposed to sheltered mid to upper eulittoral bedrock and large boulders characterised by dense barnacles Semibalanus balanoides and the limpet Patella vulgata. The community has a relatively low diversity of species though occasional cracks and crevices in the rock can provide a refuge for small individuals of the mussel Mytilus edulis, the winkle Littorina spp. and the whelk Nucella lapillus. Seaweeds are usually not found in high numbers though fissures and crevices in the bedrock can hold a sparse algae community, though patches of the red seaweed Osmundea pinnatifida can be present throughout the zone. On some shores the olive green lichen Verrucaria mucosa can be present in some abundance (Frequent). Records should not be assigned to this species impoverished biotope if there is a significant number or abundance of seaweeds.
Situation: On very exposed to exposed shores Chthamalus spp. (see A1.1121 for geographical variation) often forms a distinct white band above a darker band of S. balanoides in the mid eulittoral zone. Alternatively, found above A1.113 are the black lichen Verrucaria maura dominated biotopes (B3.1131 or B3.1132). In the lower eulittoral and the sublittoral fringe is a community dominated by the wrack Himanthalia elongata and various red seaweeds including Corallina officinalis, Mastocarpus stellatus and Osmundea pinnatifida (A1.123; A1 122; A1.126) or the mussel and barnacle dominated biotope A1.111. This unit may occur on steep and vertical faces on more sheltered shores, while fucoids dominate the flatter areas (A1.1132; A1.213).
Temporal variation: Periods with little scour or less severe storms can allow a seaweed community to develop creating a more diverse biotope (i.e. A1.313). This is a dynamic process, which will change individual sites over time. More information is required to validate this hypothesis.

Source: EUNIS habitat classification

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Algae Corallina officinalis
Algae Himanthalia elongata
Algae Mastocarpus stellatus
Invertebrates Mytilus edulis
Invertebrates Nucella lapillus
Algae Osmundea pinnatifida
Invertebrates Patella vulgata
Invertebrates Semibalanus balanoides
Species scientific name English common name Species group
Corallina officinalis Algae
Himanthalia elongata Algae
Mastocarpus stellatus Algae
Mytilus edulis Invertebrates
Nucella lapillus Dog whelk Invertebrates
Osmundea pinnatifida Algae
Patella vulgata Invertebrates
Semibalanus balanoides Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 LR.HLR.MusB.Sem.Sem <I>Semibalanus balanoides</I>, <I>Patella vulgata</I> and <I>Littorina</I> spp. on exposed to moderately exposed or vertical sheltered 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 A1.1131 Semibalanus balanoides, Patella vulgata and Littorina spp. on exposed to moderately exposed or vertical sheltered eulittoral rock same
EUNIS Habitat Classification 200308 A1.1125 Semibalanus balanoides, Patella vulgata and Littorina spp. on exposed to moderately exposed or vertical sheltered eulittoral rock same
EUNIS Habitat Classification 200202 A1.1125 Semibalanus balanoides on exposed or moderately exposed, or vertical sheltered, eulittoral rock same
EUNIS Habitat Classification 199910 A1.1125 Semibalanus balanoides on exposed or moderately exposed, or vertical sheltered, eulittoral rock same
MNCR BioMar 97.06 (Britain & Ireland) ELR.MB.BPat.Sem Semibalanus balanoides on exposed or moderately exposed, or vertical sheltered, eulittoral rock same
European Environment Agency (EEA)
Kongens Nytorv 6
1050 Copenhagen K
Denmark
Phone: +45 3336 7100