Fucus spiralis on full salinity upper eulittoral mixed substrata

English name: Fucus spiralis on full salinity upper eulittoral mixed substrata

Quick facts

EUNIS habitat type code A1.3122

Description (English)

Moderately exposed to sheltered full salinity upper eulittoral mixed substrata characterised by a band of the wrack Fucus spiralis. Occasional clumps of the wrack Pelvetia canaliculata can be overgrowing the black lichen Verrucaria maura and the olive green lichen Verrucaria mucosa. On the more stable boulders underneath the fronds the red crust Hildenbrandia rubra can be found along with the barnacle Semibalanus balanoides and the limpet Patella vulgata. The winkles Littorina littorea and Littorina saxatilis can be found on and among the boulders and cobbles, while amphipods and the crab Carcinus maenas can be present either underneath the boulders or among the brown seaweeds. The green seaweed Enteromorpha intestinalis can occur in some abundance especially during the summer.
Situation: This zone usually lies below a zone dominated by the wrack P. canaliculata (units A1.211; A1.311). Vertical surfaces in this zone, especially on moderately exposed shores, often lack the fucoids and are characterised by a barnacle-limpet dominated community (A1.113).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. A1.3122 occur above the wracks Ascophyllum nodosum (A1.3142) and/or Fucus vesiculosus (A1.3132) zones. These two fucoids may also occur among the F. spiralis, although F. spiralis always dominates. Fspi.X can also be found above a barnacle S. balanoides and winkle L. littorea dominated biotope (A2.431).
Temporal variation: Ephemeral green seaweeds such as E. intestinalis can occur in some abundance during the summer when the growth conditions are optimal.

Source: EUNIS habitat classification

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 Carcinus maenas
Invertebrates Littorina littorea
Invertebrates Littorina saxatilis
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
Carcinus maenas Invertebrates
Littorina littorea Invertebrates
Littorina saxatilis 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.X <I>Fucus spiralis</I> on full salinity upper eulittoral mixed substrata 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 A1.3122 Fucus spiralis on full salinity upper eulittoral mixed substrata same
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