Sponge crusts and anemones on wave-surged vertical infralittoral rock
|Within Vocab||Marine Habitat Classification for Britain and Ireland Version 97.06|
|Definition||Vertical very exposed and exposed bedrock gullies, tunnels and cave entrances subject to wave-surge dominated by sponge crusts (such as Clathrina coriacea, Leucosolenia botryoides and Halichondria panicea) and anemones, such as Sagartia elegans and dwarf Metridium senile generally dominate the area, the anemones often appearing to protrude through the sponge layer. This biotope is generally unaffected by sand scour (compare with those dominated by sponge crusts and ascidians (EIR.SCAs). A variant of this biotope has been identified from the very wave-surged sublittoral fringe with dense aggregations of the hydroid Tubularia (EIR.SCAn.Tub). Both of these biotopes may contain colonial ascidians, but never at high densities (compare with EIR.SCAs). Encrusting coralline algae and tufts of foliose red seaweeds may also occur on well-illuminated rock faces. Due to the wave-surged nature and vertical orientation of these biotopes, kelps are rare and certainly never dominate (compare with EIR.LhypFa and EIR.Ala.Myt). This biotope may also include a turf of Crisia or Scrupocellaria spp.|
|Has Current Version||1|
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