Barnacles and Littorina littorea on unstable eulittoral mixed substrata
|Within Vocab||Marine Habitat Classification for Britain and Ireland Version 97.06|
|Definition||Banks of cobbles and pebbles which are too unstable or too small to support fucoids are usually colonised by the barnacles Semibalanus balanoides (often with Elminius modestus) with Patella vulgata on larger rocks and often dense aggregations of Littorina littorea. Between the cobbles and pebbles Mytilus edulis often occurs, but always at low abundance (compare with MytX). Juvenile Carcinus maenas occur between pebbles, and where patches of sediment occur, infaunal species such as the lugworm Arenicola marina and cockle Cerastoderma edule may be present. Fucoids are rare in this biotope. This biotope covers a wide range of wave exposures from mobile exposed and unstable shores to more sheltered stony shores in which fucoids are unable to attach and Mytilus edulis is infrequent. [Further data required to split this biotope into two: open coast cobble sites and estuarine stony sediment sites].|
|Has Current Version||1|
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