|Basic Information||Biotope classification||Ecology||Habitat preferences and distribution||Species composition||Sensitivity||Importance|
Image Jon Davies - Cobbles with dense Pomatoceros species (ECR.PomByC). Image width ca 50 cm.
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CR.ECR.EFa.PomByC recorded () and expected () distribution in Britain and Ireland (see below)
Temperature range preferences - No information found
Limiting Nutrients -
Other preferences - Mobile hard substrata and scour
This biotope characterizes hard mobile substrata such as cobbles, pebbles and boulders with sand or gravel in areas of considerable water movement either due to wave action or tidal streams. The biotope occurs in very wave exposed to moderately wave exposed habitats, and/or in areas of strong to very weak tidal streams (Connor et al., 1997a; JNCC, 1999). Scour of the cobbles, pebbles and boulders by sand, or by mobilization of the cobbles and pebbles themselves results in a scour resistant or ephemeral fauna. For example, in the mouth of the Teign, Devon, ECR.PomByC occurs on cobbles sitting on coarse sand and gravel in a scour pit. This biotope is probably very similar to the impoverished Balanus-Pomatoceros assemblage described on hard substrata subject to severe scour or deep submergence by sand or gravel reported by Holme & Wilson (1985) in tide-swept areas of the central English Channel.
This review can be cited as follows:
Tyler-Walters, H. 2002. Pomatoceros triqueter, Balanus crenatus and bryozoan crusts on mobile circalittoral cobbles and pebbles. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 06/12/2013]. Available from: <http://www.marlin.ac.uk/habitatpreferences.php?habitatid=177&code=1997>