EUNIS habitat classification 2012 amended 2019 > A - Marine habitats > A1 - Littoral rock and other hard substrata > A1.2 - Moderate energy littoral rock > A1.21 - Barnacles and fucoids on moderately exposed shores > A1.213 - Fucus vesiculosus and barnacle mosaics on moderately exposed mid eulittoral rock

Fucus vesiculosus and barnacle mosaics on moderately exposed mid eulittoral rock

English name: Fucus vesiculosus and barnacle mosaics on moderately exposed mid eulittoral rock

Quick facts

EUNIS habitat type code A1.213

Description (English)

Exposed to moderately exposed mid eulittoral bedrock and boulders are frequently characterised by a mosaic of the barnacle Semibalanus balanoides and the wrack Fucus vesiculosus. The limpet Patella vulgata and the whelk Nucella lapillus are typically present, whilst the anemone Actinia equina and small individuals of the mussel Mytilus edulis are confined to crevices. Underneath the F. vesiculosus is a community of red seaweeds, including Corallina officinalis, Mastocarpus stellatus and Osmundea pinnatifida, usually with the winkles Littorina littorea and Littorina spp. present. Opportunistic seaweeds such as Enteromorpha intestinalis may occur in patches recently cleared on the rock or growing on the M. edulis.
Situation: On exposed shores this unit is found below the black lichen Verrucaria maura and sparse barnacles biotope (unit B3.1131) and/or below the Chthamalus spp. and P. vulgata biotopes (A1.1121). It is found above the biotope dominated by the wrack Himanthalia elongata (A1.123) or the red seaweed biotopes (A1 122; A1.2141). This unit forms an intermediate along the wave exposure gradient between the exposed shore barnacle-P. vulgata biotopes (unit A1.1132) and the sheltered shore F. vesiculosus biotope (A1.313). Vertical surfaces tend to be dominated by the barnacle-P. vulgata biotope (A1.112).
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), through this mosaic (A1.213) to a F. vesiculosus-dominated biotope (A1.313).

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 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
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.MLR.BF.FvesB <I>Fucus vesiculosus</I> and barnacle mosaics 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 A1.213 Fucus vesiculosus and barnacle mosaics on moderately exposed mid eulittoral rock same
EUNIS Habitat Classification 200308 A1.222 Fucus vesiculosus and barnacle mosaics on moderately exposed mid eulittoral rock same
EUNIS Habitat Classification 200202 A1.222 Fucus vesiculosus and barnacle mosaics on moderately exposed mid eulittoral rock same
EUNIS Habitat Classification 199910 A1.212 Fucus vesiculosus and barnacle mosaics on moderately exposed mid eulittoral rock same
MNCR BioMar 97.06 (Britain & Ireland) MLR.BF.FvesB Fucus vesiculosus and barnacle mosaics on moderately exposed mid eulittoral rock same
European Environment Agency (EEA)
Kongens Nytorv 6
1050 Copenhagen K
Denmark
Phone: +45 3336 7100