Biodiversity & Conservation

Foliose red seaweeds on exposed or moderately exposed lower infralittoral rock

IR.EIR.KFaR.FoR


EIR.FoR

Image Rohan Holt - Foliose red seaweeds on exposed or moderately exposed lower infralittoral rock. Image width ca XX m.
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Distribution map

IR.EIR.KFaR.FoR 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 Present on most coasts of the British Isles with areas where it is not recorded or known to be present from the south east coast of Britain and the east coast of Ireland.
National importance Not available

Text page icon Description of biotope

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

A dense turf of foliose red seaweeds (including Plocamium cartilagineum, Cryptopleura ramosa and Delesseria sanguinea) on exposed or moderately exposed lower infralittoral rock, generally at or below the lower limit of the kelp. Most of the red seaweeds are common to the kelp zone above, while the faunal component of the biotope is made up of species that are found either in the kelp zone or the animal-dominated upper circalittoral below. The red seaweed species composition varies considerably and at some sites a single species may dominate (particularly Plocamium cartilagineum or Cryptopleura ramosa) As well as a varied red seaweed component, this biotope may also contain occasional kelp plants and patches of the brown foliose seaweed Dictyota dichotoma. In some areas Dictyota dichotoma may occur at high densities (see EIR.FoR.Dic). Other red seaweed-dominated biotopes occur in less wave-exposed areas (MIR.PolAhn), though they are affected by sand scour and are characterized by seaweeds that are resilient to the scouring. (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:

Budd, G.C. 2002. Foliose red seaweeds on exposed or moderately exposed lower infralittoral rock. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 24/09/2014]. Available from: <http://www.marlin.ac.uk/habitatsbasicinfo.php?habitatid=65&code=1997>