Fucus serratus and red seaweeds on moderately exposed lower eulittoral rock

English name: Fucus serratus and red seaweeds on moderately exposed lower eulittoral rock

Quick facts

EUNIS habitat type code A1.2141

Description (English)

Moderately exposed lower eulittoral bedrock characterised by mosaics of the wrack Fucus serratus and turf-forming red seaweeds including Osmundea pinnatifida, Mastocarpus stellatus or Corallina officinalis. The hydroid Dynamena pumila can occur in dense populations on the F. serratus fronds whilst the sponge Halichondria panicea can cover the bedrock beneath. Underneath the canopy a number of other red seaweeds may be present including Palmaria palmata, Lomentaria articulata,Membranoptera alata and Chondrus crispus. Green seaweeds such as Cladophora rupestris, Enteromorpha intestinalis and Ulva lactuca are present though usually in small numbers. In addition, such shores provide a greater number of permanently damp refuges between the stones and underneath the seaweed canopy. Within these micro-habitats species such as the limpet Patella vulgata, the barnacle Semibalanus balanoides or the whelk Nucella lapillus can be found in lower abundance than higher up the shore. If a few boulders are present then the winkle Littorina littorea and the crab Carcinus maenas can be found on or underneath the boulders.
Situation: Above the F. serratus biotope on moderately exposed bedrock shores are the wrack Fucus vesiculosus and/or S. balanoides and P. vulgata dominated biotopes (A1.113; A1.1132; A1.213). The sub littoral fringe below on moderately exposed shores is dominated by the kelp Laminaria digitata and on vertical faces the kelp Alaria esculenta (A3.2112; A3.1112). On uneven bedrock F. serratus and red seaweeds often dominate the upper-facing surfaces, while steep or vertical rock is characterised by S. balanoides and P. vulgata dominated biotopes (see above).
Temporal variation: Fluctuations from year to year in the abundance of the F. serratus and the red seaweeds due to factors such as severe storms may convert this biotope into either A1.3151 or into a red seaweed dominated biotope. The C. maenas population may migrate offshore during the winter.

Source: EUNIS habitat classification

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Algae Alaria esculenta
Invertebrates Carcinus maenas
Algae Chondrus crispus
Algae Cladophora rupestris
Algae Corallina officinalis
Invertebrates Dynamena pumila
Algae Enteromorpha intestinalis
Algae Fucus serratus
Algae Fucus vesiculosus
Invertebrates Halichondria panicea
Algae Laminaria digitata
Invertebrates Littorina littorea
Algae Lomentaria articulata
Algae Mastocarpus stellatus
Algae Membranoptera alata
Invertebrates Nucella lapillus
Algae Osmundea pinnatifida
Algae Palmaria palmata
Invertebrates Patella vulgata
Invertebrates Semibalanus balanoides
Algae Ulva lactuca
Species scientific name English common name Species group
Alaria esculenta Algae
Carcinus maenas Invertebrates
Chondrus crispus Algae
Cladophora rupestris Algae
Corallina officinalis Algae
Dynamena pumila Invertebrates
Enteromorpha intestinalis Algae
Fucus serratus Algae
Fucus vesiculosus Algae
Halichondria panicea Invertebrates
Laminaria digitata Algae
Littorina littorea Invertebrates
Lomentaria articulata Algae
Mastocarpus stellatus Algae
Membranoptera alata Algae
Nucella lapillus Dog whelk Invertebrates
Osmundea pinnatifida Algae
Palmaria palmata Algae
Patella vulgata Invertebrates
Semibalanus balanoides Invertebrates
Ulva lactuca Algae

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 LR.MLR.BF.Fser.R <I>Fucus serratus</I> and red seaweeds on moderately exposed 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 A1.2141 Fucus serratus and red seaweeds on moderately exposed lower eulittoral rock same
EUNIS Habitat Classification 200308 A1.2231 Fucus serratus and red seaweeds on moderately exposed lower eulittoral rock narrower
EUNIS Habitat Classification 200308 A1.2232 Dense Fucus serratus on moderately exposed to very sheltered lower eulittoral rock narrower
EUNIS Habitat Classification 200202 A1.2231 Fucus serratus and red seaweeds on moderately exposed lower eulittoral rock narrower
EUNIS Habitat Classification 200202 A1.2232 Dense Fucus serratus on moderately exposed to very sheltered lower eulittoral rock narrower
EUNIS Habitat Classification 199910 A1.2132 Dense Fucus serratus on moderately exposed to very sheltered lower eulittoral rock narrower
EUNIS Habitat Classification 199910 A1.2131 Fucus serratus and red seaweeds on moderately exposed lower eulittoral rock narrower
MNCR BioMar 97.06 (Britain & Ireland) MLR.BF.Fser.Fser Dense Fucus serratus on moderately exposed to very sheltered lower eulittoral rock narrower
MNCR BioMar 97.06 (Britain & Ireland) MLR.BF.Fser.R Fucus serratus and red seaweeds on moderately exposed lower eulittoral rock narrower
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