Biodiversity & Conservation

Modiolus modiolus beds with hydroids and red seaweeds on tide-swept circalittoral mixed substrata

CR.MCR.M.ModT


MCR.ModT

Image Anon. - Modiolus modiolus beds with hydroids and red seaweeds on tide-swept circalittoral mixed substrata. Image width ca 50 cm.
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Distribution map

CR.MCR.M.ModT recorded (dark blue bullet) and expected (light blue bullet) distribution in Britain and Ireland (see below)


  • EC_Habitats
  • UK_BAP
  • OSPAR

Text page icon Habitat description

Map icon Distribution of biotope in Britain and Ireland Recorded from the Shetland Voes, Orkney Isles, the Lleyn Peninsula, off the Ards Peninsula and within the Skerries Northern Island, and some Scottish Sealochs, including Loch Duich, Loch Long and Loch Alsh cSAC. Records from off the Humber and the Bristol Channel could not be substantiated.
National importance Uncommon

Text page icon Description of biotope

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

Modiolus modiolus beds on mixed substrata (cobbles, pebbles and coarse muddy sediments) in moderately strong currents, typically on the open coast but also in tide-swept channels of marine inlets. Often with sponges such as Hemimycale columella, hydroids such as Sertularia argentea, Hydrallmania sp. and Abietinaria abietina, anthozoans such as Alcyonium digitatum, tubeworms e.g. Pomatoceros triqueter, barnacles, bryozoans such as Alcyonidium mytili and ascidians such as Dendrodoa grossularia. This biotope is typified by examples off the north-west Llyn Peninsula in north Wales and off Co. Down, Northern Ireland. (Information taken from the Marine Biotope Classification for Britain and Ireland, Version 97.06: Connor et al., 1997a, b).

Additional information icon Additional information

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This review can be cited as follows:

Tyler-Walters, H. 2006. Modiolus modiolus beds with hydroids and red seaweeds on tide-swept circalittoral mixed substrata. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 26/11/2014]. Available from: <http://www.marlin.ac.uk/habitatsbasicinfo.php?habitatid=137&code=1997>