Mixed kelps with scour-tolerant and opportunistic foliose red seaweeds on scoured or sand-covered infralittoral rock
|Marine Habitat Classification for Britain and Ireland Version 97.06
|Bedrock and boulders, often in tide-swept areas, that are subject to scouring, or periodic burial, by sand characterised by a canopy of mixed kelps (including Laminaria saccharina, Laminaria hyperborea and Saccorhiza polyschides) and Desmarestia spp; there may also be an under-storey of foliose seaweeds that can withstand scour or burial. This biotope often occurs below a L. hyperborea forest, close to a rock-sediment boundary. Red seaweeds such as Calliblepharis ciliata are able to withstand the effects of scouring as they have tough fronds and a stoloniferous base from which new growth occurs. Other seaweeds are annuals growing rapidly in the spring, taking advantage of the calmer summer weather. At some times of the year, seaweeds may be sparse (due to urchin grazing?), leaving predominantly kelps and encrusting coralline algae.
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