You are here:
Eionet
Data Dictionary
Vocabulary

Concept: [Laminaria hyperborea] park and foliose red seaweeds on moderately exposed lower infralittoral rock in the eunishabitats vocabulary

Concept URI http://eunis.eea.europa.eu/eunishabitats/A3.2142
Preferred label [Laminaria hyperborea] park and foliose red seaweeds on moderately exposed lower infralittoral rock
Definition Below the dense kelp forest (Lhyp.Ft) on moderately exposed lower infralittoral bedrock and boulders, the kelp thins out to form a park. Beneath the kelp, the rock and kelp stipes are covered by an often dense turf of foliose red seaweeds such as [Callophyllis laciniata], [Plocamium cartilagineum], [Delesseria sanguinea, Hypoglossum hypoglossoides, Cryptopleura ramosa, Callophyllis laciniata] and [Phycodrys rubens]. Coralline crusts are often present on the rock surface. Many species of red seaweed found in this biotope occur at greater abundance in the shallower kelp forest. Other seaweeds, such as the red seaweeds [Bonnemaisonia asparagoides] and [Hypoglossum hypoglossoides] as well as the brown seaweed [Dictyota dichotoma] are more abundant in this zone than the upper infralittoral. The faunal component of this biotope is similar to that found below the kelp in the upper infralittoral zone and include the hydroid [Obelia geniculata], the ascidian [Clavelina lepadiformis], the anthozoans [Urticina felina, Alcyonium digitatum] and [Caryophyllia smithii], the tube-building polychaete [Pomatoceros triqueter] and the gastropods [Calliostoma zizyphinum] and [Gibbula cineraria]. The gastropods [Gibbula cineraria] and [Calliostoma zizyphinum] and the echinoderm [Echinus esculentus] can be found grazing on the rock. Other echinoderms present include [Asterias rubens] and [Antedon bifida] which can be locally abundant, particularly in the north-west. Situation: This biotope generally occurs below [L. hyperborea] forest (Lhyp.Ft) and marks the lower limit of the infralittoral rock. Occasionally a narrow band of foliose seaweeds (FoR) may occur below the kelp park but generally circalittoral biotopes are found. Temporal variation: The under-storey of foliose and filamentous seaweeds will diminish towards the autumn and regrow in the spring. When grazing urchins (predominantly [E. esculentus]) reach a large number in the kelp park their voracious grazing can substantially alter the community structure of the biotope, removing most of the seaweeds and leaving only coralline crusts on the rock. This is common around the coast of Scotland, particularly in Shetland and such sites should be recorded as Lhyp.GzFt.
Notation A3.2142
Status Valid
Status Modified 2014-01-31
Accepted Date 2014-01-31
Not Accepted Date
Has broader
Has exact match