EUNIS habitat classification 2012 amended 2019 > A - Marine habitats > A1 - Littoral rock and other hard substrata > A1.1 - High energy littoral rock > A1.15 - Fucoids in tide-swept conditions > A1.152 - Fucus serratus, sponges and ascidians on tide-swept lower eulittoral rock

Fucus serratus, sponges and ascidians on tide-swept lower eulittoral rock

English name: Fucus serratus, sponges and ascidians on tide-swept lower eulittoral rock

Quick facts

EUNIS habitat type code A1.152

Description (English)

Sheltered to extremely sheltered lower eulittoral bedrock, boulders and cobbles that are subject to increased tidal water movement and characterised by the wrack Fucus serratus and a rich assemblage of filter-feeding fauna. This community is encouraged by the increased water movement. It includes species such as the sponges Halichondria panicea and Hymeniacidon perleve, which occur frequently on steep and overhanging faces. Underneath the F. serratus canopy is a diverse flora of foliose red seaweeds including Mastocarpus stellatus, Lomentaria articulata, Membranoptera alata and Chondrus crispus. The green seaweeds Cladophora spp., Enteromorpha intestinalis and Ulva lactuca and the wrack Ascophyllum nodosum are present though usually in small numbers. On the rock underneath the seaweed canopy, species such as the limpet Patella vulgata, the barnacles Semibalanus balanoides and Balanus crenatus and the whelk Nucella lapillus can be found though in lower abundance than higher up the shore. Also present on the rock are the tube-forming polychaetes Pomatoceros triqueter and spirorbids and more mobile species such as the winkles Littorina mariae and Littorina littorea, the top shell Gibbula cineraria and the crab Carcinus maenas. Lastly, several species of bryozoans are usually present including Electra pilosa and Alcyonidium gelatinosum, all competing for space with the hydroid Dynamena pumila, which can form dense populations on the F. serratus fronds.
Situation: Areas where increased tidal movement influences such a community are in the narrows and/or intertidal sills of Scottish sea lochs and the rias in south-west England. In the few cases where the rock is also subject to variable salinity, an impoverished community results and records should be classified as A1.326 rather than the present biotope.

Source: EUNIS habitat classification

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Alcyonidium gelatinosum
Algae Ascophyllum nodosum
Invertebrates Balanus crenatus
Invertebrates Carcinus maenas
Algae Chondrus crispus
Invertebrates Dynamena pumila
Invertebrates Electra pilosa
Algae Enteromorpha intestinalis
Algae Fucus serratus
Invertebrates Gibbula cineraria
Invertebrates Halichondria panicea
Invertebrates Littorina littorea
Algae Lomentaria articulata
Algae Mastocarpus stellatus
Algae Membranoptera alata
Invertebrates Nucella lapillus
Invertebrates Patella vulgata
Invertebrates Pomatoceros triqueter
Invertebrates Semibalanus balanoides
Algae Ulva lactuca
Species scientific name English common name Species group
Alcyonidium gelatinosum Invertebrates
Ascophyllum nodosum Algae
Balanus crenatus Invertebrates
Carcinus maenas Invertebrates
Chondrus crispus Algae
Dynamena pumila Invertebrates
Electra pilosa Invertebrates
Enteromorpha intestinalis Algae
Fucus serratus Algae
Gibbula cineraria Invertebrates
Halichondria panicea Invertebrates
Littorina littorea Invertebrates
Lomentaria articulata Algae
Mastocarpus stellatus Algae
Membranoptera alata Algae
Nucella lapillus Dog whelk Invertebrates
Patella vulgata Invertebrates
Pomatoceros triqueter Invertebrates
Semibalanus balanoides Invertebrates
Ulva lactuca Algae

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 LR.HLR.FT.FserT <I>Fucus serratus</I>, sponges and ascidians on tide-swept lower 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 A1.152 Fucus serratus, sponges and ascidians on tide-swept lower eulittoral rock same
EUNIS Habitat Classification 200202 A1.3151 Fucus serratus, sponges and ascidians on tide-swept lower eulittoral rock same
EUNIS Habitat Classification 199910 A1.3151 Fucus serratus, sponges and ascidians on tide-swept lower eulittoral rock same
MNCR BioMar 97.06 (Britain & Ireland) SLR.F.Fserr.T Fucus serratus, sponges and ascidians on tide-swept lower eulittoral rock same
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