Skip to Content

Marine Habitat Classification


1 result for 'CR.LCR.BrAs.NovPro.VS'

   CR.LCR.BrAs.NovPro.VS  Novocrania anomala, Dendrodoa grossularia and Rolandia coralloides on variable salinity circalittoral rock

This variant typically occurs on lower circalittoral silty, bedrock or boulder cliffs and ridges in very wave-sheltered fjordic sealochs subjected to variable salinity regimes (such as Loch Etive). In these sheltered conditions, there are frequently dense populations of the ascidian Dendrodoa grossularia, the brachiopod Novocrania anomala and to a lesser extent, the brachiopod Terebratulina retusa, which are able to tolerate the variable salinity. Other solitary ascidians that may be present include Ciona intestinalis, Corella parallelogramma, Ascidiella scabra, Ascidia mentula, Ascidia virginea and Polycarpa pomaria. The anemone Protanthea simplex is occasionally seen, although to a lesser extent than in NeoPro, possibly due to the variable salinity. The hydroids Bougainvillia muscus and Lafoea dumosa, the cup-coral Caryophilia smithii and Rolandia coralloides are occasionally present. The tubes formed by the polychaete Sabella pavonina may be observed standing erect from the rock surface. The rest of the rock surface is usually covered by encrusting red algae and the polychaete Spirobranchus triqueter and Protula tubularia. The sea cucumber Psolus phantapus may be found on the underside of boulders. Other species such as the hermit crab Pagurus bernhardus and the spider crab Hyas araneus may be found amongst the rock/boulders. The starfish Asterias rubens, Crossaster papposus, and Henricia spp. and the sea urchin Psammechinus miliaris are also recorded within this variant. The relatively bare, silty rock supports low numbers of a relatively few species. Although barren rock grazed by the sea urchin Echinus esculentus is found in other sea loch biotopes (see FaAlCr.Pom and FaAlCr.Car), E.esculentus is virtually absent within NeoPro.VS.
Back to top