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CR.LCR.BrAs Brachiopod and ascidian communities
Published date 2015-03This biotope complex occurs on the wave-sheltered, circalittoral bedrock and boulders subject to weak tidal streams. The biotopes within this complex are typically found in the Scottish sealochs (with...
SS.SCS.CCS.Pkef Protodorvillea kefersteini and other polychaetes in impoverished circalittoral mixed gravelly sand
Published date 2015-03In coarse gravelly or shelly sand sometimes with a slight mud content, along open coasts in depths of 10 to 30 m, and in shallower offshore areas, an impoverished community characterised by Protodorvi...
LR.FLR.CvOv.RpurPlac Rhodochorton purpureum and Pleurocladia lacustris crusts on upper and mid-shore cave walls and ceilings
Published date 2015-03Golden brown velvety growths of the brown algae Pleurocladia lacustris occurring in mats with the red alga Rhodochorton purpureum forming on cave walls and upper littoral levels of cliffs. Fauna is sp...
SS.SBR Sublittoral biogenic reefs on sediment
Published date 2015-03This complex includes polychaete reefs, bivalve reefs (e.g. mussel beds) and cold water coral reefs. These communities develop in a range of habitats from exposed open coasts to estuaries, marine inle...
CR.HCR.XFa.ByErSp.DysAct Mixed turf of bryozoans and erect sponges with Dysidea fragilis and Actinothoe sphyrodeta on tide-swept wave-exposed circalittoral rock
Published date 2015-03This variant typically occurs on exposed and moderately wave-exposed bedrock and boulders subject to a variety of tidal regimes (from strong through to weak). It is found mainly in the 10-20m depth ra...
SS.SMu.ISaMu.CundAasp Cylista undata and Ascidiella aspersa on infralittoral sandy mud
Published date 2015-03Sheltered sublittoral mud or sandy mud in shallow water with relatively few conspicuous species may be characterised by the anemone Cylista undata in low numbers and the tunicate Ascidiella aspersa. O...
CR.HCR.XFa.ByErSp Bryozoan turf and erect sponges on tide-swept circalittoral rock
Published date 2015-03This biotope is typically found on wave-exposed circalittoral bedrock or boulders subject to tidal streams ranging from moderately strong to strong. It often has a thin layer of silt covering the seab...
CR.HCR.XFa.FluCoAs.Paur Polyclinum aurantium and Flustra foliacea on sand-scoured tide-swept moderately wave-exposed circalittoral rock
Published date 2015-03This variant is typically found on the upper face of moderately exposed, moderately tide-swept, circalittoral bedrock or boulders. Sand and silt are periodically re-suspended in the water column, resu...
CR.MCR.CFaVS.CuSpH.As Cushion sponges, hydroids and ascidians on turbid tide-swept sheltered circalittoral rock
Published date 2015-03This sub-biotope typically occurs in a mixture of turbid, full and variable salinity water, on wave-sheltered and moderately exposed bedrock or boulders. Tidal streams are typically moderately strong ...
SS.SSa Sublittoral sands and muddy sands
Published date 2015-03Clean medium to fine sands or non-cohesive slightly muddy sands on open coasts, offshore or in estuaries and marine inlets. Such habitats are often subject to a degree of wave action or tidal currents...