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SS.SSa.IFiSa.ScupHyd Sertularia cupressina and Hydrallmania falcata on tide-swept sublittoral sand with cobbles or pebbles.

Published date 2015-03

Shallow sands with cobbles and pebbles, exposed to strong tidal streams, with conspicuous colonies of hydroids, particularly Hydrallmania falcata and to a lesser extent Sertularia cupressina and S. ar...


IR.LIR.K.LhypSlat.Gz Grazed, mixed Laminaria hyperborea and Saccharina latissima on sheltered infralittoral rock

Published date 2015-03

Silted infralittoral rock with mixed Laminaria hyperborea and Saccharina latissima kelp forest, intensively grazed by the echinoderm Echinus esculentus and the gastropods Steromphala cineraria and Cal...


IR.MIR.KT.XKT Mixed kelp with foliose red seaweeds, sponges and ascidians on sheltered tide-swept infralittoral rock

Published date 2015-03

Stable, tide-swept rock characterised by dense kelp Laminaria hyperborea and/or Saccharina latissima forest on scoured, coralline-encrusted rock. This biotope occurs in the sheltered narrows and sills...


IR.LIR.IFaVS Faunal communities on variable or reduced salinity infralittoral rock

Published date 2015-03

Shallow subtidal rocky habitats which support faunal-dominated communities, with seaweed communities only poorly developed or absent. In some sealochs dense mussel Mytilus edulis beds (MytRS) develop ...


IR.MIR.KT.FilRVS Filamentous red seaweeds, sponges and Balanus crenatus on tide-swept variable-salinity infralittoral rock

Published date 2015-03

Tide-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....


SS.SCS.ICS.CumCset Cumaceans and Chaetozone setosa in infralittoral gravelly sand

Published date 2015-03

In shallow medium-fine sands with gravel, on moderately exposed open coasts, communities dominated by cumaceans such as Iphinoe trispinosa and Diastylis bradyi along with the cirratulid polychaete Cha...


LR.MLR Moderate energy littoral rock

Published date 2015-03

Moderately exposed shores (bedrock, boulders and cobbles) characterised by mosaics of barnacles and fucoids on the mid and upper shore; with fucoids and red seaweed mosaics on the lower shore. Where f...


IR.FIR.SG.CC Coralline crusts in surge gullies and scoured infralittoral rock

Published date 2015-03

Scoured rock in wave-surged caves, tunnels or gullies often looks rather bare, and may be characterised by a limited scour-tolerant fauna of Balanus crenatus and/or Spirobranchus triqueter with spiror...


SS.SMu.SMuVS.NhomTubi Nephtys hombergii and Tubificoides spp. in variable salinity infralittoral soft mud

Published date 2015-03

Variable salinity soft infralittoral mud and sandy mud characterised by the polychaete Nephtys hombergii and oligochaetes of the genus Tubificoides. Other characterising species that may be present ar...


SS.SMx.IMx.Ost Ostrea edulis beds on shallow sublittoral muddy mixed sediment

Published date 2015-03

Dense beds of the oyster Ostrea edulis can occur on muddy fine sand or sandy mud mixed sediments. There may be considerable quantities of dead oyster shell making up a substantial portion of the subst...



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