EUNIS habitat classification 2012 amended 2019 > A - Marine habitats > A3 - Infralittoral rock and other hard substrata > A3.1 - Atlantic and Mediterranean high energy infralittoral rock > A3.11 - Kelp with cushion fauna and/or foliose red seaweeds > A3.114 - Sparse Laminaria hyperborea and dense Paracentrotus lividus on exposed infralittoral limestone

Sparse Laminaria hyperborea and dense Paracentrotus lividus on exposed infralittoral limestone

English name: Sparse Laminaria hyperborea and dense Paracentrotus lividus on exposed infralittoral limestone

Description (English)

This biotope is known from only one location, the Aran Islands, Co. Galway (Ireland). Here, a limestone platform between 3 m and 6 m of depth is dominated by a dense population of the urchin Paracentrotus lividus, which heavily graze and burrow into the soft limestone. So intense is the grazing pressure that the rock appears completely bare, except for a coralline algal crust and occasional Laminaria hyperborea and Saccorhiza polyschides. The anthozoans Sagartia elegans and Corynactis viridis are also present, though at low abundance. The grazed kelp also extends deeper to 20 to 25 m further offshore. (Only one CB record within this biotope).
Situation: This rare biotope has only been recorded from one location and the neighbouring biotopes were not fully surveyed. In deeper water (30-40m) there is unit A4.121.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A3.114
Bern Convention Included in a Resolution 4 habitat type at a higher level (A3)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Algae Laminaria hyperborea
Algae Saccorhiza polyschides
Invertebrates Corynactis viridis
Invertebrates Paracentrotus lividus
Invertebrates Sagartia elegans
Species scientific name English common name Species group
Laminaria hyperborea Algae
Saccorhiza polyschides Algae
Corynactis viridis Invertebrates
Paracentrotus lividus Invertebrates
Sagartia elegans Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 IR.HIR.KFaR.LhypPar Sparse <I>Laminaria hyperborea</I> and dense <I>Paracentrotus lividus</I> on exposed infralittoral limestone source
CORINE Land Cover 5.2.3. Sea and ocean n/a
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 200410 A3.114 Sparse Laminaria hyperborea and dense Paracentrotus lividus on exposed infralittoral limestone same
EUNIS Habitat Classification 200308 A3.114 Sparse Laminaria hyperborea and dense Paracentrotus lividus on exposed infralittoral limestone rock same
EUNIS Habitat Classification 200202 A3.114 Sparse Laminaria hyperborea and dense Paracentrotus lividus on exposed infralittoral limestone rock same
EUNIS Habitat Classification 199910 A3.114 Sparse Laminaria hyperborea and dense Paracentrotus lividus on exposed infralittoral limestone rock same
MNCR BioMar 97.06 (Britain & Ireland) EIR.KFaR.LhypPar Sparse Laminaria hyperborea and dense Paracentrotus lividus on exposed infralittoral limestone rock same
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