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SS.SMx.SMxVS.CreMed Crepidula fornicata and Mediomastus fragilis in variable salinity infralittoral mixed sediment
Published date 2015-03It is associated with oyster beds and relict oyster beds (SS.SMx.IMx.Ost) in southern England and Wales ... It may be associated with SS.SMx.IMx.VcorAsquAps and possibly form a component of SS.SMu.ISaMu.CundAasp
SS.SMu.ISaMu.CundAasp Cylista undata and Ascidiella aspersa on infralittoral sandy mud
Published date 2015-03Other taxa may include Carcinus maenas, Pagurus bernhardus and terebellid polychaetes. ... The status of this biotope is uncertain at present as it is not known whether it is an impoverished,
LR.FLR.Lic.UloUro Ulothrix flacca and Urospora spp. on freshwater-influenced vertical littoral fringe soft rock
Published date 2015-03It is visually recognised as a closely adherent, often shiny, green mat of filamentous growth. ... and a mixed zone of UloUro and Ulv can occur.
CR.MCR.CFaVS.CuSpH Cushion sponges and hydroids on turbid tide-swept sheltered circalittoral rock
Published date 2015-03This biotope is found in variable salinity environments and tends to occur on the upper faces of circalittoral ... This biotope is characterised by aggregations of cushion sponges such as Hymeniacidon perlevis, Halichondria
M.AtUA.Mu.HolCom.HygPet Hygrosoma petersii, Benthothuria funebris and Oneirophanta assemblage on Atlantic upper abyssal mud
Published date 2015-03No other detail are available on this assemblage and it is possible that it may represent a transitional ... longicauda and Oneirophanta mutabilis assemblage found deeper.
LR.FLR.Eph.UlvPor Porphyra purpurea and Ulva spp. on sand-scoured mid or lower eulittoral rock
Published date 2015-03As a consequence of sand-abrasion, wracks such as Fucus vesiculosus or Fucus spiralis are scarce and ... the community is typically dominated by ephemeral red or green seaweeds, particularly the foliose red
LS.LMx.GvMu.HedMx.Cir Hediste diversicolor, cirratulids and Tubificoides spp. in littoral gravelly sandy mud
Published date 2015-03Nematodes and oligochaetes occur, as well as the bivalve Macoma balthica. ... It is probable that there are broad transition areas between this biotope and the corresponding muddy
IR.HIR.KFaR.AlaAnCrSp Alaria esculenta forest with dense anemones and crustose sponges on extremely exposed infralittoral bedrock
Published date 2015-03Beneath the A. esculenta canopy, the rock surface is covered by a dense turf of anthozoans such as Cylista ... and the rock surface is characterised by a dense turf of red algae (FoR).
M.AtMB.Mu.BurAne.CerAne Cerianthid anemones and burrowing megafauna in Atlantic mid bathyal mud
Published date 2015-03This biotope is characterised by burrowing anemones (Cerianthidae), unidentified hydroids (Hydrozoa) ... and unidentified tube worms (Sabellidae) on bioturbated mud with phytodetritus.
LR.HLR.FR.Him Himanthalia elongata and red seaweeds on exposed to moderately exposed lower eulittoral rock
Published date 2015-03The wrack Fucus serratus is normally present as well. ... On some shores this biotope may occur as a distinct zone between a Fucus serratus and red algal turf