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 > A1.1132 - Semibalanus balanoides, Fucus vesiculosus and red seaweeds on exposed to moderately exposed eulittoral rock

Semibalanus balanoides, Fucus vesiculosus and red seaweeds on exposed to moderately exposed eulittoral rock

English name: Semibalanus balanoides, Fucus vesiculosus and red seaweeds on exposed to moderately exposed eulittoral rock

Quick facts

EUNIS habitat type code A1.1132
Bern Convention Included in a Resolution 4 habitat type at a higher level (A1.11)

Description (English)

Exposed and moderately exposed upper and mid eulittoral bedrock characterised by the barnacle Semibalanus balanoides, the limpet Patella vulgata and the whelk Nucella lapillus with a sparse community of seaweeds. Turfs of the wrack Fucus vesiculosus can be present on the more horizontal parts of the shore though usually in low abundance (Occasional). Individuals of F. vesiculosus can lack the characteristic twin air bladders due to environmental stress (i.e. wave exposure). A sparse seaweed community consisting of foliose red seaweeds such as Osmundea pinnatifida and Mastocarpus stellatus are usually present along with the Corallina officinalis and the green seaweed Enteromorpha intestinalis. The algal community is usually restricted to fissures and cracks in the bedrock surface. Moist cracks and crevices also provide a refuge for small individuals of the mussel Mytilus edulis and the winkles Littorina saxatilis and Littorina littorea. These crevices can also be occupied by encrusting coralline algae and the anemone Actinia equina.
Situation: On exposed and moderately exposed shores. This unit is found below the black lichen Verrucaria maura and sparse barnacles biotope (B3.1131) and/or below the Chthamalus spp. and P. vulgata biotopes (A1.112). It is found above the biotope dominated by the wrack Himanthalia elongata (A1.123) or the red seaweed biotopes (A1 122).
Temporal variation: On some shores, particularly those which are moderately exposed to wave action, temporal fluctuations in the abundance of limpets, barnacles and fucoid seaweeds may occur. As a result, over a number of years, a single shore may cycle between the barnacle-P. vulgata dominated biotope (A1.1132) and a F. vesiculosus-dominated biotope (A1.313). Individuals of F. vesiculosus growing in stressed environmental conditions (i.e. high wave exposure) do not always develop the characteristic twin air bladders.

Source: EUNIS habitat classification

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Algae Corallina officinalis
Algae Enteromorpha intestinalis
Algae Fucus vesiculosus
Algae Himanthalia elongata
Algae Mastocarpus stellatus
Algae Osmundea pinnatifida
Invertebrates Actinia equina
Invertebrates Littorina littorea
Invertebrates Littorina saxatilis
Invertebrates Mytilus edulis
Invertebrates Nucella lapillus
Invertebrates Patella vulgata
Invertebrates Semibalanus balanoides
Species scientific name English common name Species group
Corallina officinalis Algae
Enteromorpha intestinalis Algae
Fucus vesiculosus Algae
Himanthalia elongata Algae
Mastocarpus stellatus Algae
Osmundea pinnatifida Algae
Actinia equina Invertebrates
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
Marine Habitat Classification Britain/Ireland 0405 LR.HLR.MusB.Sem.FvesR <I>Semibalanus balanoides</I>, <I>Fucus vesiculosus</I> and red seaweeds on exposed to moderately exposed 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 A1.1132 Semibalanus balanoides, Fucus vesiculosus and red seaweeds on exposed to moderately exposed eulittoral rock same
EUNIS Habitat Classification 200308 A1.1124 Semibalanus balanoides, Fucus vesiculosus and red seaweeds on exposed to moderately exposed eulittoral rock same
EUNIS Habitat Classification 200202 A1.1124 Barnacles, Patella and Fucus vesiculosus f. linearis on exposed eulittoral rock same
EUNIS Habitat Classification 199910 A1.1124 Barnacles, Patella and Fucus vesiculosus f. linearis on exposed eulittoral rock same
MNCR BioMar 97.06 (Britain & Ireland) ELR.MB.BPat.Fvesl Barnacles, Patella and Fucus vesiculosus f. linearis on exposed eulittoral rock same
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