|Basic Information||Biotope classification||Ecology||Habitat preferences and distribution||Species composition||Sensitivity||Importance|
Image Rohan Holt - Bedrock with the sea fan Eunicella verrucosa, the soft coral Alcyonium glomeratum and the stalked sponge Raspailia ramosa amongst a hydroid turf. Image width ca 1.0 m.
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CR.HCR.XFa.ByErSp.Eun recorded () and expected () distribution in Britain and Ireland (see below)
For a list of 2004 characterising species please see the JNCC website.
To assess the sensitivity of the biotope, the sensitivity of component species is reviewed. Those species that are considered to be particularly indicative of the sensitivity of the biotope, and for which research has been undertaken in detail are shown below (see selection criteria). The biology of other component species of the biotope is also taken into account wherever information is known to the researcher.
|Community Importance||Species name||Common Name|
|Key structural||Eunicella verrucosa||Pink sea fan|
|Important characterizing||Axinella dissimilis||A branching sponge|
|Important characterizing||Pentapora fascialis||Ross|
Eunicella verrucosa, the pink sea fan, is found with high frequency in the biotope and provides a key structural component. Eunicella verrucosa also acts as a functionally similar representative for other species, such as Swiftia pallida, found in other biotopes represented by this review. Pentapora fascialis also has a structural role and is characteristic of the biotope although may not always be present. Axinella dissimilis is characteristic of the biotope and represents other species of moderately large, upright, branching sponges. All these three species contribute significantly to the physical structure and complexity of the biotope. Where information on other species is known, it is taken into account in the sensitivity assessments.
This review can be cited as follows:
Jackson, A. & Hiscock, K. 2000. Erect sponges, Eunicella verrucosa and Pentapora fascialis on slightly tide-swept moderately exposed circalittoral rock.. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 26/11/2014]. Available from: <http://www.marlin.ac.uk/habitatreproduction.php?habitatid=77&code=2004>