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LR.HLR.MusB.Sem Semibalanus balanoides on exposed to moderately exposed or vertical sheltered eulittoral rock
Published date 2015-03Exposed to moderately exposed mid to upper eulittoral bedrock and large boulders characterised by dense barnacles Semibalanus balanoides and the limpet Patella vulgata. The community has a relatively ...
LR.HLR.FR.Pal Palmaria palmata on very exposed to moderately exposed lower eulittoral rock
Published date 2015-03Very exposed to moderately exposed lower eulittoral rock which supports a pure stand of dulse Palmaria palmata as a dense band or in large patches above the main kelp zone. P. palmata favours shaded o...
IR.MIR.KT.FilRVS Filamentous red seaweeds, sponges and Balanus crenatus on tide-swept variable-salinity infralittoral rock
Published date 2015-03Tide-swept infralittoral rock subject to variable salinity and turbid waters occurs in the mid to upper reaches of the rias of south-west Britain, where riverine freshwater input reduces the salinity....
IR.HIR.KFaR.AlaAnCrSp Alaria esculenta forest with dense anemones and crustose sponges on extremely exposed infralittoral bedrock
Published date 2015-03This biotope has only been recorded from Rockall, where Alaria esculenta appears to replace Laminaria hyperborea as the dominant kelp forest species on the extremely wave-exposed steep and vertical ro...
LR.HLR.FR.Osm Osmundea pinnatifida on moderately exposed mid eulittoral rock
Published date 2015-03Exposed to moderately exposed lower eulittoral rock characterised by extensive areas or a distinct band of Osmundea pinnatifida and Gelidium pusillum (either together or separately). This community us...
IR.HIR.KFaR.LhypR.Pk Laminaria hyperborea park with dense foliose red seaweeds on exposed lower infralittoral rock
Published date 2015-03Very exposed to exposed lower infralittoral bedrock or large boulders characterised by a kelp park of Laminaria hyperborea with a dense turf of foliose red seaweeds and encrusting coralline algae. The...
IR.MIR.KR.Lhyp.GzPk Grazed Laminaria hyperborea park with coralline crusts on lower infralittoral rock
Published date 2015-03Exposed to moderately exposed Laminaria hyperborea kelp park in some areas is intensively grazed by the urchin Echinus esculentus. The rock surface lacks a significant turf of foliose seaweeds and gen...
IR.MIR.KR.Lhyp.Pk Laminaria hyperborea park and foliose red seaweeds on moderately exposed lower infralittoral rock
Published date 2015-03Below 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 of...
IR.HIR.KSed.XKScrR Mixed kelps with scour-tolerant and opportunistic foliose red seaweeds on scoured or sand-covered infralittoral rock
Published date 2015-03Bedrock and boulders, often in tide-swept areas, that are subject to scouring or periodic burial by sand, characterised by a canopy of mixed kelps such as Saccharina latissima, Laminaria hyperborea an...
SS.SMx.CMx.OphMx Ophiothrix fragilis and/or Ophiocomina nigra brittlestar beds on sublittoral mixed sediment
Published date 2015-03Circalittoral sediment dominated by brittlestars (hundreds or thousands m-2) forming dense beds, living epifaunally on boulder, gravel or sedimentary substrata. Ophiothrix fragilis and Ophiocomina nig...