Fucus spiralis on full salinity sheltered upper eulittoral rock

English name: Fucus spiralis on full salinity sheltered upper eulittoral rock

Description (English)

Sheltered 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 and sparse individuals of the barnacle Semibalanus balanoides while the mussel Mytilus edulis can be found attached in cracks and crevices. A variety of red algae including Hildenbrandia rubra may be present underneath the fronds. During the summer months ephemeral green seaweeds such as Enteromorpha intestinalis can be common.
Situation: This zone usually lies below a zone dominated by the wrack Pelvetia canaliculata (units A1.211; A1.311), but occasional clumps of P. canaliculata may be present (usually less than common) amongst the F. spiralis. In areas of extreme shelter, such as in Scottish sea lochs, the P. canaliculata and F. spiralis zones often merge together forming a very narrow band. A1.3121 occurs above the wracks Ascophyllum nodosum (A1.314) and/or Fucus vesiculosus (A1.313) zones and these two fucoids may also occur, although F. spiralis always dominates. Vertical surfaces in this zone, especially on moderately exposed shores, often lack the fucoids and are characterised by a barnacle-limpet dominated community (Sem).

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A1.3121

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Algae Ascophyllum nodosum
Algae Enteromorpha intestinalis
Algae Fucus spiralis
Algae Fucus vesiculosus
Algae Hildenbrandia rubra
Algae Pelvetia canaliculata
Invertebrates Littorina littorea
Invertebrates Littorina saxatilis
Invertebrates Mytilus edulis
Invertebrates Patella vulgata
Invertebrates Semibalanus balanoides
Species scientific name English common name Species group
Ascophyllum nodosum Algae
Enteromorpha intestinalis Algae
Fucus spiralis Algae
Fucus vesiculosus Algae
Hildenbrandia rubra Algae
Pelvetia canaliculata Algae
Littorina littorea Invertebrates
Littorina saxatilis Invertebrates
Mytilus edulis Invertebrates
Patella vulgata Invertebrates
Semibalanus balanoides Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 LR.LLR.F.Fspi.FS <I>Fucus spiralis</I> on full salinity sheltered upper 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 A1.3121 Fucus spiralis on full salinity sheltered upper eulittoral rock same
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