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CR.HCR.DpSp Deep sponge communities (circalittoral)
Published date 2015-03This biotope complex typically occurs on deep (commonly below 30m depth), wave-exposed circalittoral rock subject to negligible tidal streams. The sponge component of this biotope is the most striking...
LS.LSa.MoSa Barren or amphipod-dominated mobile sand shores
Published date 2015-03Shores consisting of clean mobile sands (coarse, medium and some fine-grained), with little very fine sand, and no mud present. Shells and stones may occasionally be present on the surface. The sand m...
SS.SBR.PoR.SalvMx Sabellaria alveolata on variable salinity sublittoral mixed sediment
Published date 2015-03Tide-swept sandy mixed sediments with cobbles and pebbles, in variable salinity or fully marine conditions, may be characterised by surface accumulations of the reef building polychaete Sabellaria alv...
IR.FIR Features of infralittoral rock
Published date 2015-03Only one biotope complex is currently found within the infralittoral rock features habitat complex: Surge Gulleys (SG). Surge Gulleys features are found throughout the infralittoral rock zone, and usu...
SS.SMu.OMu.ForThy Foraminiferans and Thyasira sp. in deep circalittoral fine mud
Published date 2015-03In deep water and soft muds of Boreal and Arctic areas, a community dominated by foraminiferans and the bivalve Thyasira sp. (e.g. T. croulinensis and T. pygmaea) may occur (Thorson 1957; Künitzer et...
LR.LLR.F.Fserr Fucus serratus on sheltered lower eulittoral rock
Published date 2015-03Sheltered to extremely sheltered lower eulittoral rock with Fucus serratus (for detailed description of the rich associated community please see Fserr.FS). Two variants of this biotope have been descr...
LR.LLR.F.Fspi.X Fucus spiralis on full salinity upper eulittoral mixed substrata
Published date 2015-03Moderately exposed to sheltered full salinity upper eulittoral mixed substrata characterised by a band of the wrack Fucus spiralis. Occasional clumps of the wrack Pelvetia canaliculata can be overgrow...
LR.HLR.MusB.Sem.LitX Semibalanus balanoides and Littorina spp. on exposed to moderately exposed eulittoral boulders and cobbles
Published date 2015-03Large patches of boulders, cobbles and pebbles in the eulittoral zone on exposed to moderately exposed shores colonised by the barnacle Semibalanus balanoides and, on larger rocks, the limpet Patella ...
LR.FLR.Eph Ephemeral green or red seaweed communities (freshwater or sand-influenced)
Published date 2015-03Ephemeral seaweeds on disturbed littoral rock in the lower to upper shore. Dominant green seaweeds include Ulva intestinalis, Ulva lactuca and the red seaweeds Rhodothamniella floridula and Porphyra p...
SS.SBR.SMus.MytSS Mytilus edulis beds on sublittoral sediment
Published date 2015-03Shallow sublittoral mixed sediment, in fully marine coastal habitats or sometimes in variable salinity conditions in the outer regions of estuaries, are characterised by beds of the common mussel Myti...