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LR.FLR.Lic.Ver.Ver Verrucaria maura on very exposed to very sheltered upper littoral fringe rock

Published date 2015-03

Upper littoral fringe bedrock, boulders and stable cobbles on very exposed to very sheltered shores which have a blanket covering of the black lichen Verrucaria maura. The winkle Littorina saxatilis i...


LR.LLR.F.Fspi Fucus spiralis on sheltered upper eulittoral rock

Published date 2015-03

Sheltered upper eulittoral bedrock is typically characterised by a band of the spiral wrack Fucus spiralis overlying the black lichen Verrucaria maura. Underneath the fronds of F. spiralis and the occ...


LR.LLR.FVS Fucoids in variable salinity

Published date 2015-03

Blankets of fucoid seaweeds dominating sheltered to extremely sheltered rocky shores with variable salinity. The wrack Pelvetia canaliculata (PelVS) occurs on the upper shore, with the wrack Fucus spi...


LR.MLR.BF.FvesB Fucus vesiculosus and barnacle mosaics on moderately exposed mid eulittoral rock

Published date 2015-03

Exposed to moderately exposed mid eulittoral bedrock and boulders are frequently characterised by a mosaic of the barnacle Semibalanus balanoides and the wrack Fucus vesiculosus. The limpet Patella vu...


LR.LLR.FVS.FserVS Fucus serratus and large Mytilus edulis on variable salinity lower eulittoral rock

Published date 2015-03

Areas of very sheltered lower eulittoral rock or mixed substrata subject to variable salinity, which support an impoverished community dominated by the wrack Fucus serratus. The hydroid Dynamena pumil...


LR.MLR.BF.Rho Rhodothamniella floridula on sand-scoured lower eulittoral rock

Published date 2015-03

Lower eulittoral and sublittoral fringe bedrock and boulders subject to mild sand-scouring characterised by a canopy of the wracks Fucus serratus or Fucus vesiculosus, beneath which a mat of the sand-...


LR.FLR.Eph.Ulv Ulva spp. on freshwater-influenced and/or unstable upper eulittoral rock

Published date 2015-03

Upper shore hard substratum that is relatively unstable (e.g. soft rock) or subject to considerable freshwater runoff is typically very species poor and characterised by a dense mat of Ulva spp., thou...


LR.FLR.CvOv.SpR Sponges and shade-tolerant red seaweeds on overhanging lower eulittoral bedrock and in cave entrances

Published date 2015-03

Overhanging shaded bedrock on the open lower shore and at the entrance to inner reaches of caves (where light availability permits), which is not subject to appreciable wave-surge, characterised by a ...


LR.FLR.Lic.Bli Blidingia spp. on vertical littoral fringe soft rock

Published date 2015-03

Vertical soft rock in the littoral fringe may be characterised by a band of the green seaweeds Blidingia minima and Blidingia marginata. Unbranched filamentous green seaweeds, including Ulothrix flacc...


LR.HLR.FR.Fdis Fucus distichus and Fucus spiralis f. nana on extremely exposed upper shore rock

Published date 2015-03

Extremely exposed gently or steeply sloping upper shore bedrock which supports a mixture of the wracks Fucus distichus and Fucus spiralis f. nana, the latter often at the top of the zone. On some site...



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