Palmaria palmata on very to moderately exposed lower eulittoral rock
|Within Vocab||Marine Habitat Classification for Britain and Ireland Version 97.06|
|Definition||Moderately exposed lower eulittoral rock may support an often pure stand of dulse Palmaria palmata which forms a dense band or occurs in large patches above the main kelp zone (Ldig). It can also occur on very exposed shores (recorded from Orkney). Palmaria is a common component of adjacent biotopes; it should only be recorded as Pal where it forms a distinct band or occurs in large patches on the shore. Palmaria favours shaded or overhanging rock and often forms a band at the top of overhanging rock. Relatively low abundances of other red algae, such as Osmundea pinnatifida, Chondrus crispus and Corallina officinalis, may also occur in this biotope although Palmaria always dominates. It is likely that the Palmaria biotope represents an opportunistic assemblage of fast-growing species which occupy gaps within or between the canopies of longer-lived perennials such as Fucus serratus. Palmaria often forms a luxurious growth on Mytilus edulis on exposed shores in which case it should be recorded as MytB.|
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