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Marine Habitat Classification


3 results for 'SS.SMx.SMxVS.CreMed'

   SS.SMx.SMxVS.CreMed  Crepidula fornicata and Mediomastus fragilis in variable salinity infralittoral mixed sediment

Variable salinity mixed sediment characterised by the slipper limpet Crepidula fornicata and the polychaetes Mediomastus fragilis and Aphelochaeta marioni. Other numerically important taxa include the oligochaetes Tubificoides benedii, syllids such as Exogone naidinaand Sphaerosyllis, and other polychaetes Nephtys hombergii. Lepidonotus squamatus and Scoloplos armiger may also be common. Shell debris and cobbles are colonised by encrusting worms, the ascidians Ascidiella aspersa, Ascidiella scabra, Molgula sp. and Dendrodoa grossularia (the ascidians may not be recorded adequately by remote infaunal survey techniques).

   SS.SMx.SMxVS  Sublittoral mixed sediment in variable salinity (estuaries)

Shallow sublittoral mixed sediments in estuarine conditions, often with surface shells or stones, enabling the development of diverse epifaunal communities, e.g. Crepidula fornicata (SS.SMx.SMxVS.CreMed), as well as infaunal communities. This biotope complex is therefore often quite species rich, compared with purer sediments.

   SS.SMx.IMx.CreAsAn  Crepidula fornicata with ascidians and anemones on infralittoral coarse mixed sediment

Medium-coarse sands with gravel, shells, pebbles and cobbles on moderately exposed coasts may support populations of the slipper limpet Crepidula fornicata with ascidians and anemones. C. fornicata is common in this biotope though not as abundant as in the muddier estuarine biotope SS.SMx.SMxVS.CreMed to which this is related. Anemones such as Urticina felina and Alcyonium digitatum and ascidians such as Styela clava are typically found in this biotope. Bryozoans such as Flustra foliacea are also found along with polychaetes such as Lanice conchilega. Little information is available with regard to the infauna of this biotope but given the nature of the sediment the infaunal communities are liable to resemble those in biotopes from the SS.SCS habitat complex. As with SS.SMx.CMx.FluHyd this biotope could be considered a superficial or epibiotic overlay but more data is required to support this.
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