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CR.FCR.FouFa.AdigMsen Alcyonium digitatum and Metridium senile on moderately wave-exposed circalittoral steel wrecks

Published date 2015-03

This biotope is found on moderately wave-exposed circalittoral steel wrecks that are subject to moderately strong to weak tidal streams. The vertical and upward facing sides of the wreck stand proud o...


IR.LIR.K.Slat.Gz Grazed Saccharina latissima with Echinus, brittlestars and coralline crusts on sheltered infralittoral rock

Published date 2015-03

Coralline encrusted rock with scattered tufts of red seaweed and a relatively high abundance of grazing echinoderms which typically include the urchin Echinus esculentus and/or the brittlestars Ophiot...


SS.SCS.CCS.Pkef Protodorvillea kefersteini and other polychaetes in impoverished circalittoral mixed gravelly sand

Published date 2015-03

In coarse gravelly or shelly sand sometimes with a slight mud content, along open coasts in depths of 10 to 30 m, and in shallower offshore areas, an impoverished community characterised by Protodorvi...


CR.LCR.BrAs Brachiopod and ascidian communities

Published date 2015-03

This biotope complex occurs on the wave-sheltered, circalittoral bedrock and boulders subject to weak tidal streams. The biotopes within this complex are typically found in the Scottish sealochs (with...


IR.FIR.IFou Infralittoral fouling seaweed communities

Published date 2015-03

Moderately exposed to wave-sheltered artificial substrata (such as steel wrecks/concrete pilings/cable debris etc) subject to moderately strong to weak tidal streams in the infralittoral zone. This bi...


SS.SMx.OMx Offshore circalittoral mixed sediment

Published date 2015-03

Offshore (deep) circalittoral habitats with slightly muddy mixed gravelly sand and stones or shell. This habitat may cover large areas of the offshore continental shelf although there is relatively li...


LS.LMx.GvMu Hediste-dominated gravelly sandy mud shores

Published date 2015-03

Sheltered gravelly sandy mud, subject to reduced salinity, mainly on the mid and lower shore. The infaunal community is dominated by abundant ragworms Hediste diversicolor. Other species of the infaun...


IR.HIR.KFaR.LhypR Laminaria hyperborea with dense foliose red seaweeds on exposed infralittoral rock

Published date 2015-03

Very exposed to exposed infralittoral bedrock or large boulders characterised by the kelp Laminaria hyperborea, beneath which is a dense turf of foliose red seaweeds. Three variations of this biotope ...


LS.LBR.Sab Littoral Sabellaria honeycomb worm reefs

Published date 2015-03

The sedentary polychaete Sabellaria alveolata (honeycomb worm) builds tubes from sand and shell. On exposed shores, where there is a plentiful supply of sediment, S. alveolata can form honeycomb reefs...


IR.LIR.IFaVS.CcasEin Cordylophora caspia and Einhornia crustulenta on reduced salinity infralittoral rock

Published date 2015-03

Shallow sublittoral rock in the upper estuary of one of the south-west inlets (Tamar) with very high turbidity and therefore no seaweeds. The brackish-water hydroid Cordylophora caspia and small colon...



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