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CR.LCR Low energy circalittoral rock
Published date 2015-03This habitat complex occurs on wave-sheltered circalittoral bedrock and boulders subject to mainly weak/very weak tidal streams. The biotopes identified within this habitat complex are often dominated...
CR.FCR.FouFa Circalittoral fouling faunal communities
Published date 2015-03This biotope complex contains two biotopes which, although have different physical habitat characteristics, share the fact that they colonise new areas of artificial substrata relatively quickly. The ...
CR.HCR.XFa.ByErSp.Cyl Mixed turf of bryozoans and erect sponges with Cylista elegans on tide-swept ciraclittoral rock
Published date 2015-03This variant is typically found on wave-exposed circalittoral bedrock and boulders, on steep slopes and upper faces in moderate tidal streams. This species-rich biotope is characterised by a dense spo...
CR.MCR.EcCr.CarSwi.Aglo Caryophyllia smithii, Swiftia pallida and Alcyonium glomeratum on wave-sheltered circalittoral rock
Published date 2015-03This variant typically occurs on sheltered, ridged, circalittoral bedrock or boulders subject to only weak tidal streams, but may be found in somewhat more exposed conditions. It is found in water dep...
CR.MCR.EcCr.CarSp.PenPcom Caryophyllia smithii and sponges with Pentapora foliacea, Porella compressa and crustose communities on wave-exposed circalittoral rock
Published date 2015-03This variant is typically found on the upper faces and vertical sides of wave-exposed bedrock or boulders subject to moderately strong to weak tidal streams. The fauna is often sparse with the frequen...
CR.MCR.EcCr.FaAlCr.Flu Flustra foliacea on slightly scoured silty circalittoral rock
Published date 2015-03This variant is typically found on the upper faces of moderately wave-exposed circalittoral bedrock or boulders subjected to moderately strong tidal streams. These rocky patches may be interspersed wi...
CR.MCR.EcCr.FaAlCr.Adig Alcyonium digitatum, Spirobranchus triqueter, algal and bryozoan crusts on wave-exposed circalittoral rock
Published date 2015-03This variant is typically found on the vertical, steep and upper faces of wave-exposed circalittoral bedrock or boulders subject to varying amounts of current. The variant has a very grazed, sparse ap...
CR.MCR.SfR.Pid Piddocks with a sparse associated fauna in sublittoral very soft chalk or clay
Published date 2015-03This biotope occurs on circalittoral soft rock, such as soft chalk or clay, most often in moderately exposed tide-swept conditions. As soft chalk and firm clay are often too soft for sessile filter-fe...
CR.MCR.CSab.Sspi.ByB Sabellaria spinulosa with a bryozoan turf and barnacles on silty turbid circalittoral rock
Published date 2015-03This variant is typically found encrusting the upper faces of exposed and moderately exposed circalittoral rock and mixed substrata, subject to strong and moderately strong currents and high turbidity...
CR.MCR.CFaVS.CuSpH.VS Cushion sponges and hydroids on turbid tide-swept variable salinity sheltered circalittoral rock
Published date 2015-03This sub-biotope typically occurs in turbid, variable salinity water, on wave-sheltered bedrock in estuaries subject to strong tidal regimes where circalittoral communities occur in relatively shallow...