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1 result for 'SS.SSa.CMuSa.AbraAirr'

   SS.SSa.CMuSa.AbraAirr  Acrocnida brachiata with Astropecten irregularis and other echinoderms in circalittoral muddy sand

In shallow, circalittoral non-cohesive muddy sand (typically less than 20% silt/clay) abundant populations of the brittlestar Acrocnida brachiata may occur with other echinoderms such as Astropecten irregularis, Asterias rubens, Ophiura ophiura and Echinocardium cordatum. Other infaunal species typically include Kurtiella bidentata, Lanice conchilega and Magelona filiformis. This biotope is likely to form part of the non-cohesive/cohesive muddy sand communities, which make up the 'off-shore muddy sand association' described by other workers (Jones 1951; Mackie 1990). It is possible that in some areas this biotope forms an epifaunal overlay which may cover a range of biotopes in years of good recruitment but does not develop into a settled or established community. If sampling epifauna, in addition to those described above, taxa such as Pagurus spp., Astropecten irregularis and Corystes cassivelaunus may be present, although their distribution is known to be extensive beyond this biotope.
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