EUNIS habitat classification 2017 > M - Marine benthic habitats > MA1 - Littoral rock > MA12 - Atlantic littoral rock > MA124 - Mussel and/or barnacle communities with seaweeds on Atlantic littoral rock > MA1242 - Fucus spiralis on full salinity exposed to moderately exposed upper eulittoral rock

Fucus spiralis on full salinity exposed to moderately exposed upper eulittoral rock

Description (English)

Exposed to moderately exposed upper eulittoral bedrock characterised by a band of the spiral wrack Fucus spiralis overlying the black lichen Verrucaria maura and the olive green lichen Verrucaria mucosa. Underneath the fronds of F. spiralis is a community consisting of the limpet Patella vulgata, the winkles Littorina saxatilis and Littorina littorea, the mussel Mytilus edulis and the barnacle Semibalanus balanoides. The whelk Nucella lapillus can be found in cracks and crevices preying on the mussels and barnacles. During the summer months ephemeral green seaweeds such as Enteromorpha intestinalis can be common. The insect Anurida maritima can be present in this zone taking shelter in cracks and crevices when the tide comes in.
Situation: This zone usually lies below a zone dominated by the wrack Pelvetia canaliculata (unit MA1-241), but occasional clumps of P. canaliculata may be present (usually less than common) amongst the F. spiralis. This unit occurs above the wrack Fucus vesiculosus (MA1-243) zones. Vertical surfaces in this zone, especially on moderately exposed shores, often lack the fucoids and are characterised by a barnacle-limpet dominated community (unit MA1-223).

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code MA1242
Relation to Resolution 4 habitat type (used for designation of Emerald sites)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Algae Enteromorpha intestinalis
Algae Fucus spiralis
Algae Fucus vesiculosus
Algae Pelvetia canaliculata
Invertebrates Anurida maritima
Invertebrates Littorina littorea
Invertebrates Littorina saxatilis
Invertebrates Mytilus edulis
Invertebrates Nucella lapillus
Invertebrates Patella vulgata
Species scientific name English common name Species group
Enteromorpha intestinalis Algae
Fucus spiralis Algae
Fucus vesiculosus Algae
Pelvetia canaliculata Algae
Anurida maritima Invertebrates
Littorina littorea Invertebrates
Littorina saxatilis Invertebrates
Mytilus edulis Invertebrates
Nucella lapillus Dog whelk Invertebrates
Patella vulgata Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 2007 (revised descriptions 2012) A1.212 Fucus spiralis on full salinity exposed to moderately exposed upper eulittoral rock same
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type Comment
EUNIS Habitat Classification 200410 A1.212 Fucus spiralis on full salinity exposed to moderately exposed upper eulittoral rock same
EUNIS Habitat Classification 200308 A1.312 Fucus spiralis on moderately exposed to very sheltered upper eulittoral rock wider
EUNIS Habitat Classification 200202 A1.312 Fucus spiralis on moderately exposed to very sheltered upper eulittoral rock same
EUNIS Habitat Classification 199910 A1.312 Fucus spiralis on moderately exposed to very sheltered upper eulittoral rock same
MNCR BioMar 97.06 (Britain & Ireland) SLR.F.Fspi Fucus spiralis on moderately exposed to very sheltered upper eulittoral rock same
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