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Concept: [Fucus serratus] and red seaweeds on moderately exposed lower eulittoral rock in the eunishabitats vocabulary

Concept URI http://eunis.eea.europa.eu/eunishabitats/A1.2141
Preferred label [Fucus serratus] and red seaweeds on moderately exposed lower eulittoral rock
Definition 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 (Sem; Sem.FvesR; FvesB). The sub littoral fringe below on moderately exposed shores is dominated by the kelp [Laminaria digitata] and on vertical faces the kelp [Alaria esculenta] (Ldig.LdigBo; Ala.Ldig). 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 Fserr.FS or into a red seaweed dominated biotope. The [C. maenas] population may migrate offshore during the winter.
Notation A1.2141
Status Valid
Status Modified 2014-01-31
Accepted Date 2014-01-31
Not Accepted Date
Has broader
Has exact match