|Basic Information||Biotope classification||Ecology||Habitat preferences and distribution||Species composition||Sensitivity||Importance|
COS.COS.Sty recorded () and expected () distribution in Britain and Ireland (see below)
UK Biodiversity Action Plan
|Habitat Directive feature (Annex 1)|
Fourteen species are listed by Allen (1953a) as attached to live individuals of Pseudamussium septemradiatum from the Clyde Sea area including five foramaniferans, one sponge, two polychaetes, one bryozoan, two barnacles, two small bivalves but only one ascidian, Styela clava. Allen (1953a) notes that dead shells had very little attached and suggested that movement of the scallop was important in retaining surfaces clear of silt for settlement of attached fauna. None of the other species in the biotope are known to provide food or a habitat for other species.
This biotope is only known from one location and from one survey station. It is distinctly different from other biotopes and includes one species (Styela gelatinosa) that is unique to it. It is therefore important as a nationally rare biotope.
This review can be cited as follows:
Hiscock, K. 2002. Styela gelatinosa and other solitary ascidians on very sheltered deep circalittoral muddy sediment. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 07/12/2013]. Available from: <http://www.marlin.ac.uk/habitatimportance.php?habitatid=274&code=1997>