Verrucaria maura on moderately exposed to very sheltered upper littoral fringe rock
|Within Vocab||Marine Habitat Classification for Britain and Ireland Version 97.06|
|Definition||Upper littoral fringe bedrock and stable boulders on very exposed to very sheltered shores are typically characterised by the black lichen Verrucaria maura and littorinid molluscs. Littorina saxatilis is most common, although Littorina neritoides may be found on more exposed shores. This black lichen zone is normally found below the yellow and grey lichen zone (YG), with yellow and grey lichens typically less than common in this biotope. In very sheltered areas there is not always a clear transition from one zone to the next and a mixed zone of YG and Ver.Ver is common. With increasing wave exposure the two lichen zones become wider and more distinct.|
|Has Current Version||1|
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