Fucoids in variable salinity

English name: Fucoids in variable salinity

Description (English)

Blankets of fucoid seaweeds dominating sheltered to extremely sheltered rocky shores with variable salinity. The wrack Pelvetia canaliculata (A1.321) occurs on the upper shore, with the wrack Fucus spiralis (A1.322) below. The middle shore is dominated by vast areas of the wrack Ascophyllum nodosum or the wrack Fucus vesiculosus (A1.323, A1.324) or a mixture of both. The wrack Fucus serratus covers lower shore bedrock and boulders (A1.326). Fucus ceranoides can be found on extremly sheltered shores with variable or low salinity (A1.327). The variable salinity communities are species impoverished compared to fucoids in full salinity or in tide-swept conditions as red seaweeds and sponges are usually absent. Underneath the canopy are a few green seaweeds including Enteromorpha intestinalis and Cladophora spp., while the red seaweed Polysiphonia lanosa can be found as an epiphyte on A. nodosum. On the rock and among the boulders are the winkles Littorina littorea and Littorina saxatilis, the crab Carcinus maenas, the barnacles Semibalanus balanoides and Elminius modestus and even the occasional mussel Mytilus edulis.
Situation: On sheltered eulittoral rocky shores with variable salinity conditions, such as sea loch or estuaries.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A1.32

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Algae Ascophyllum nodosum
Invertebrates Carcinus maenas
Invertebrates Elminius modestus
Algae Enteromorpha intestinalis
Algae Fucus serratus
Algae Fucus spiralis
Algae Fucus vesiculosus
Invertebrates Littorina littorea
Invertebrates Littorina saxatilis
Invertebrates Mytilus edulis
Algae Pelvetia canaliculata
Algae Polysiphonia lanosa
Invertebrates Semibalanus balanoides
Species scientific name English common name Species group
Ascophyllum nodosum Algae
Carcinus maenas Invertebrates
Elminius modestus Invertebrates
Enteromorpha intestinalis Algae
Fucus serratus Algae
Fucus spiralis Algae
Fucus vesiculosus Algae
Littorina littorea Invertebrates
Littorina saxatilis Invertebrates
Mytilus edulis Invertebrates
Pelvetia canaliculata Algae
Polysiphonia lanosa Algae
Semibalanus balanoides Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 LR.LLR.FVS Fucoids in variable salinity 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 A1.32 Fucoids in variable salinity same
EUNIS Habitat Classification 200308 A1.32 Fucoids, barnacles or ephemeral seaweeds on sheltered littoral mixed substrata overlap
EUNIS Habitat Classification 200308 A1.31 Dense fucoids on sheltered littoral rock overlap
EUNIS Habitat Classification 200202 A1.31 Dense fucoids on sheltered littoral rock overlap
EUNIS Habitat Classification 200202 A1.32 Fucoids, barnacles or ephemeral seaweeds on sheltered littoral mixed substrata overlap
EUNIS Habitat Classification 199910 A1.31 Dense fucoids on sheltered littoral rock overlap
EUNIS Habitat Classification 199910 A1.32 Fucoids, barnacles or ephemeral seaweeds on sheltered littoral mixed substrata overlap
EUNIS Habitat Classification 199811 A1.32 Fucoids, barnacles or ephemeral seaweeds on sheltered mixed substrata overlap
EUNIS Habitat Classification 199811 A1.31 Dense fucoids on sheltered rock overlap
EUNIS Habitat Classification 199712 A1.41 Dense fucoids on sheltered rock overlap
EUNIS Habitat Classification 199712 A1.42 Fucoids, barnacles or ephemeral seaweeds on sheltered mixed substrata overlap
MNCR BioMar 97.06 (Britain & Ireland) SLR.FX Fucoids, barnacles or ephemeral seaweeds (mixed substrata) overlap
MNCR BioMar 97.06 (Britain & Ireland) SLR.F Dense fucoids (stable rock) overlap
MNCR BioMar 96.7 (Britain & Ireland) SLR.F   narrower
MNCR BioMar 96.7 (Britain & Ireland) SLR.FX   same
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