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LS Littoral sediment
Published date 2015-03Littoral sediment includes habitats of shingle (mobile cobbles and pebbles), gravel, sand and mud or any combination of these which occur in the intertidal zone. Littoral sediment is defined further u...
IR Infralittoral rock (and other hard substrata)
Published date 2015-03Infralittoral rock includes habitats of bedrock, boulders and cobbles which occur in the shallow subtidal zone and typically support seaweed communities. The upper limit is marked by the top of the ke...
IR.HIR.KFaR.Ala.Myt Alaria esculenta, Mytilus edulis and coralline crusts on very exposed sublittoral fringe bedrock
Published date 2015-03Very exposed sublittoral fringe bedrock characterised by the kelp Alaria esculenta and dense patches of small individuals of the mussel Mytilus edulis, both of which grow over a dense cover of encrust...
LR.FLR.CvOv.SpByAs Sponges, bryozoans and ascidians on deeply overhanging lower shore bedrock or caves
Published date 2015-03Overhanging, and shaded vertical, bedrock on the lower shore and in lower shore caves, which is not subject to appreciable wave-surge, characterised by crusts of bryozoans including Oshurkovia littora...
LR.MLR.BF.PelB Pelvetia canaliculata and barnacles on moderately exposed littoral fringe rock
Published date 2015-03Exposed to moderately exposed steep, lower littoral fringe rock and mixed substrata characterised by the wrack Pelvetia canaliculata and sparse barnacles Chthamalus montagui and Semibalanus balanoides...
LR.FLR.Lic.UloUro Ulothrix flacca and Urospora spp. on freshwater-influenced vertical littoral fringe soft rock
Published date 2015-03An assemblage of the small un-branched filamentous green seaweeds Ulothrix flacca, Urospora penicilliformis and Urospora wormskioldii at High Water Spring Tide level on steep and vertical rock often i...
LR.LLR.F.Pel Pelvetia canaliculata on sheltered littoral fringe rock
Published date 2015-03Lower littoral fringe bedrock or stable boulders and mixed substrata in sheltered to extremely sheltered conditions characterised by a dense cover of the wrack Pelvetia canaliculata. The biotope may b...
IR.HIR.KSed.Sac Saccorhiza polyschides and other opportunistic kelps on disturbed sublittoral fringe rock
Published date 2015-03Exposed low-lying reefs in the sublittoral fringe or upper infralittoral (generally above 5m depth), mainly in the southwest and west, dominated by the kelp Saccorhiza polyschides. This opportunistic ...
IR.HIR.KFaR.LhypRVt Laminaria hyperborea and red seaweeds on exposed vertical rock
Published date 2015-03On exposed coasts with moderately strong to weak tidal currents generally at depths of 0-10m, vertical rock communities dominated by frequent Laminaria hyperborea and its commonly associated red seawe...
SS.SCS.CCS.SpiB Spirobranchus triqueter with barnacles and bryozoan crusts on unstable circalittoral cobbles and pebbles
Published date 2015-03This biotope is characterised by a few ubiquitous robust and/or fast growing ephemeral species which are able to colonise pebbles and unstable cobbles and slates which are regularly moved by wave and ...