|Basic Information||Biotope classification||Ecology||Habitat preferences and distribution||Species composition||Sensitivity||Importance|
Image Dominic Counsell - Aggregation of Ocnus planci on broken shell and cobbles. Image width ca 40 cm.
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SS.IMU.MarMu.Ocn recorded () and expected () distribution in Britain and Ireland (see below)
EC Habitats Directive
|Habitat Directive feature (Annex 1)||Large shallow inlets and bays
This biotope is notable for the large aggregations of the sea cucumber Ocnus planci (or Ocnus brunneus). The presence of hard substrata in areas otherwise dominated by sheltered muds allows epifaunal species to colonize the habitat increasing the species richness. The biotope is dominated by suspension feeders, which probably transport primary productivity from the pelagic ecosystem to the benthic ecosystem, although their relative importance in energy flow within the community and surrounding ecosystem is not known.
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This review can be cited as follows:
Tyler-Walters, H. 2002. Ocnus planci aggregations on sheltered sublittoral muddy sediment. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 26/11/2015]. Available from: <http://www.marlin.ac.uk/habitatimportance.php?habitatid=325&code=1997>