Concept
Grazed Laminaria hyperborea park with coralline crusts on lower infralittoral rock
| URI | http://vocab.nerc.ac.uk/collection/M20/current/JNCCMNCR00000720/ | |
|---|---|---|
| Within Vocab | Marine Habitat Classification for Britain and Ireland Version 04.05 | |
| Alternative Labels | IR.MIR.KR.Lhyp.GzPk | |
| Definition | Exposed to moderately exposed Laminaria hyperborea kelp park in some areas is intensively grazed by the urchin Echinus esculentus. The rock surface lacks a significant turf of foliose seaweeds and generally looks bare, though coralline algal crusts and some grazing-resistant animals such as the tube-building polychaete Pomatoceros triqueter cover it. The kelp stipes may or may not be grazed; in the most extremely grazed areas, the stipes are also devoid of seaweeds. More usually, however, the stipes offers a refuge from grazing, and are characterised by dense turfs of red seaweeds, especially Phycodrys rubens and Delesseria sanguinea. Brown seaweeds present include Cutleria multifida, Laminaria saccharina and Dictyota dichotoma. The fauna within a grazed kelp park is also relatively sparse, though some species will survive in cracks and crevices or under boulders including the ascidian Clavelina lepadiformis. The encrusting bryozoan Parasmittina trispinosa and the anthozoans Alcyonium digitatum, Urticina felina and Caryophyllia smithii often characterise vertical or overhanging rock. Mobile species include the gastropods Gibbula cineraria and Calliostoma zizyphinum and the hermit crab Pagurus bernhardus The echinoderms Ophiocomina nigra, Ophiothrix fragilis and Crossaster papposus, generally absent from the kelp forest, can be found in these kelp parks along with Asterias rubens and Antedon bifida. | |
| Date | 2018-02-13T18:42:27 | |
| Identifier | SDN:M20::JNCCMNCR00000720 | |
| Note | accepted | |
| Has Current Version | 1 | |
| version | 1 | |
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