|Basic Information||Biotope classification||Ecology||Habitat preferences and distribution||Species composition||Sensitivity||Importance|
Image Rohan Holt - Foliose red seaweeds on exposed or moderately exposed lower infralittoral rock. Image width ca XX m.
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IR.EIR.KFaR.FoR recorded () and expected () distribution in Britain and Ireland (see below)
To assess the sensitivity of the biotope, the sensitivity of component species is reviewed. Those species that are considered to be particularly indicative of the sensitivity of the biotope, and for which research has been undertaken in detail are shown below (see selection criteria). The biology of other component species of the biotope is also taken into account wherever information is known to the researcher.
|Community Importance||Species name||Common Name|
|Important characterizing||Delesseria sanguinea||Sea beech|
|Important characterizing||Lithophyllum incrustans||Encrusting coralline alga|
|Important other||Echinus esculentus||Edible sea urchin|
|Important other||Alcyonium digitatum||Dead man's fingers|
|Important other||Urticina felina||Dahlia anemone|
|Important other||Nemertesia antennina||Sea beard|
|Important other||Clavelina lepadiformis||Light bulb sea squirt|
|Important other||Calliostoma zizyphinum||Painted top shell|
The biotope is dominated by foliose and encrusting red algae, such as Delesseria sanguinea, Plocamium cartilagineum, Cryptopleura ramosa, Phycodrys rubens, Dilsea carnosa, Heterosiphonia plumosa and Corallinaceae. Delesseria sanguinea has been selected as an important characterizing species representative of the foliose red algae, as it occurs with the highest percentage frequency (Connor et al., 1997a). Lithophyllum incrustans represents the encrusting Corallinaceae. The edible sea urchin, Echinus esculentus, has been assessed to be a key functional species within the EIR.FoR biotope. Its grazing activity may help maintain the patchy and species rich epiflora/fauna by preventing species from becoming dominant (see Vost, 1983). Other important species include representatives of the sessile epifauna; anemones, soft corals, hydroids, bryozoans, ascidians and grazing molluscs such as Calliostoma zizyphinum. Mobile species such as crabs and fish are not faithful to the biotope although their sensitivity will be integrated where appropriate.
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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 06/03/2015]. Available from: <http://www.marlin.ac.uk/habitatreproduction.php?habitatid=65&code=1997>