Large Metridium senile and solitary ascidians on grazed very sheltered circalittoral rock
|Within Vocab||Marine Habitat Classification for Britain and Ireland Version 97.06|
|Definition||Very sheltered circalittoral rock with very large Metridium senile (possibly where slight tidal streams pass over rocky ridges) and a variety of solitary ascidians including Ascidia mentula and Ciona intestinalis. Much of the rock surface appears Echinus-grazed and is covered in silt and coralline crusts with sparse Pomatoceros triqueter. Occasional Bolocera tuediae found at some sites in the north Clyde sealochs. Other species include Edwardsiella carnea, Sarcodictyon roseum and sparse Modiolus modiolus. Often found in shallow water above the Neocrania and Protanthea biotope (NeoPro) and just below Laminaria saccharina forest but has often been included as part of one of these biotopes. This biotope is distinct from other Metridium-dominated types (e.g. those which occur on strongly tide-swept and exposed circalittoral rock and steel wreckage) in that most of the associated fauna is characteristic of very sheltered conditions.|
|Has Current Version||1|
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