Laminaria digitata on moderately exposed sublittoral fringe bedrock

Quick facts

EUNIS habitat type code MB12171
Relation to Resolution 4 habitat type (used for designation of Emerald sites)

Description (English)

Exposed to sheltered sublittoral fringe bedrock dominated by a dense canopy of Laminaria digitata, often with a wide range of filamentous and foliose red seaweeds beneath. The most frequently occurring red seaweeds are Palmaria palmata, Corallina officinalis, Mastocarpus stellatus, Chondrus crispus, Lomentaria articulata and Membranoptera alata. Generally the rocky substratum is covered by encrusting coralline algae, on which occasional limpets Patella vulgata and topshells Gibbula cineraria graze. A wide variety of fauna occurs, some of the most commonly occurring species being the sponge Halichondria panicea and the tube-building polychaete Pomatoceros triqueter. Kelp holdfasts provide a refuge for a varied assemblage of species such as sponges and the limpet Helcion pellucidum, while encrusting bryozoans such as Electra pilosa more often are found on the fronds of foliose red seaweeds. Solitary ascidians may be locally abundant where overhanging or vertical rock occurs, while the hydroid Dynamena pumila can be abundant on Fucus serratus and Laminaria sp. fronds. On exposed, wave-surged shores, the robust red seaweeds M. stellatus, C. crispus and C. officinalis can form a dense turf beneath the kelp along with the occasional green seaweed Ulva lactuca. Similarly on such shores the mussel Mytilus edulis can occur in extremely dense aggregations on the rock, beneath the kelp canopy.
Situation: This biotope is usually found on the extreme low shore below the Fucus serratus zone (unit MA1-244) and above the truly sublittoral Laminaria hyperborea zone (unit MB1-21A).

Source: EUNIS habitat classification

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Algae Chondrus crispus
Algae Corallina officinalis
Algae Fucus serratus
Algae Laminaria digitata
Algae Laminaria hyperborea
Algae Lomentaria articulata
Algae Mastocarpus stellatus
Algae Membranoptera alata
Algae Palmaria palmata
Algae Ulva lactuca
Invertebrates Dynamena pumila
Invertebrates Electra pilosa
Invertebrates Gibbula cineraria
Invertebrates Halichondria panicea
Invertebrates Mytilus edulis
Invertebrates Patella vulgata
Invertebrates Pomatoceros triqueter
Species scientific name English common name Species group
Chondrus crispus Algae
Corallina officinalis Algae
Fucus serratus Algae
Laminaria digitata Algae
Laminaria hyperborea Algae
Lomentaria articulata Algae
Mastocarpus stellatus Algae
Membranoptera alata Algae
Palmaria palmata Algae
Ulva lactuca Algae
Dynamena pumila Invertebrates
Electra pilosa Invertebrates
Gibbula cineraria Invertebrates
Halichondria panicea Invertebrates
Mytilus edulis Invertebrates
Patella vulgata Invertebrates
Pomatoceros triqueter Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 2007 (revised descriptions 2012) A3.2111 Laminaria digitata on moderately exposed sublittoral fringe bedrock same
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type Comment
EUNIS Habitat Classification 200410 A3.2111 Laminaria digitata on moderately exposed sublittoral fringe bedrock same
EUNIS Habitat Classification 200308 A3.2111 Laminaria digitata on moderately exposed sublittoral fringe rock same
EUNIS Habitat Classification 200202 A3.2111 Laminaria digitata on moderately exposed sublittoral fringe rock same
EUNIS Habitat Classification 199910 A3.2111 Laminaria digitata on moderately exposed sublittoral fringe rock same
MNCR BioMar 97.06 (Britain & Ireland) MIR.KR.Ldig.Ldig Laminaria digitata on moderately exposed sublittoral fringe rock same
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