Biodiversity & Conservation

Mytilus edulis beds on reduced salinity tide-swept infralittoral rock


<i>%Mytilus edulis%</i> beds on reduced salinity tide-swept infralittoral rock
Distribution map

IR.SIR.EstFa.MytT recorded (dark blue bullet) and expected (light blue bullet) distribution in Britain and Ireland (see below)

  • EC_Habitats

Text page icon Habitat description

Map icon Distribution of biotope in Britain and Ireland Isolated locations on the west and east coast of Scotland, Outer Hebrides and Shetland. Also found on the north west coast of Wales.
National importance Scarce

Text page icon Description of biotope

For a full description of this biotope including characterizing species, distribution, survey information and references visit JNCC

This biotope is reported to occur in shallow tide-swept conditions and also in reduced salinity tide-swept conditions (may be 2 biotopes?). Some descriptions indicate a wide variety of epifaunal colonizers on the mussel valves, including seaweeds, hydroids and bryozoans. Predatory starfish Asterias rubens also occur in this biotope. This biotope generally appears to lack large kelp plants, although transitional examples containing mussels and kelps plants may also occur. [Further data and analysis required for this biotope]. (Information taken from the Marine Biotope Classification for Britain and Ireland, Version 97.06: Connor et al., 1997a, b).

Additional information icon Additional information

This biotope appears to be distinguished from other biotopes by occurring on rock and in strong currents suggesting that it is a feature of the tidal rapids at the entrance to lagoonal habitats.

This review can be cited as follows:

Hiscock, K. 2001. Mytilus edulis beds on reduced salinity tide-swept infralittoral rock. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 30/11/2015]. Available from: <>