Barnacles and fucoids on moderately exposed shores
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English name
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Barnacles and fucoids on moderately exposed shores
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EUNIS habitat type code
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A1.21
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Level
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4
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Edition
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EUNIS Habitat Classification 2012 - a revision of the habitat classification descriptions.
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Description ( English )
Moderately exposed rocky shores characterised by a mosaic of fucoids and barnacles on bedrock and boulders, where the extent of the fucoid cover is typically less than the blanket cover associated with sheltered shores. Other species are normally present as well in this habtat including the winkle [Littorina littorea], the whelk [Nucella lapillus] and the red seaweed [Mastocarpus stellatus]. Beneath the band of yellow and grey lichens at the top of the shore is a zone dominated by the wrack [Pelvetia canaliculata], scattered barnacles, while the black lichen [Verrucaria maura] covers the rock surface (A1.211). Below, on the mid shore the wrack [Fucus vesiculosus] generally forms a mosaic with the barnacle [Semibalanus balanoides] and the limpet [Patella vulgata] (A1.213). Finally, the wrack [Fucus serratus], dominates the lower shore, while a variety of red seaweeds can be found underneath the[F. serratus] canopy (A1.214). A number of variants have been described: lower shore bedrock and boulders characterised by mosaics of [F. serratus] and turf-forming red seaweeds (A1.2141); where the density of [F. serratus] is greater (typically Common - Superabundant) and the abundance of red seaweeds less A1.3151 should be recorded. The presence of boulders and cobbles on the shore can increase the micro-habitat diversity, which often results in a greater species richness. Although the upper surface of the boulders may bear very similar communities to A1.3151 there is often an increase in fauna (crabs, tube-forming polychaetes, sponges and bryozoans) and A1.2142 should be recorded. Sand-influenced exposed to moderately exposed lower shore rock can be characterised by dense mats of [Rhodothamniella floridula] (A1.215).
Situation: Mid and lower eulittoral moderately exposed bedrock with a lichen zone above and a kelp dominated community below in the sublittoral zone.
Source
Connor, D.W., Allen, J.H., Golding, N., Howell, K.L., Lieberknecht, L.M., Northen, K.O. & Reker, J.B. [edited ETC/BD] (2004)
External links
Relationships with other classifications
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Classification
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Code
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Title
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Relation type
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EUNIS Habitat Classification 200410
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A1.21
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Barnacles and fucoids on moderately exposed shores
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same
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EUNIS Habitat Classification 200308
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A1.22
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Barnacles and fucoids on moderate energy shores
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same
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EUNIS Habitat Classification 200202
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A1.22
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Fucoids and barnacles on moderately exposed littoral rock
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same
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EUNIS Habitat Classification 199910
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A1.21
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Fucoids and barnacles on moderately exposed littoral rock
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same
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EUNIS Habitat Classification 199811
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A1.21
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Fucoids, barnacles and limpets on moderately exposed rock
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same
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EUNIS Habitat Classification 199712
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A1.31
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Fucoids, barnacles and limpets on moderately exposed rock
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same
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CORINE Land Cover
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4.2.3.
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Intertidal flats
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n/a
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Marine Habitat Classification Britain/Ireland 0405
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LR.MLR.BF
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Barnacles and fucoids on moderately exposed shores
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source
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MNCR BioMar 97.06 (Britain & Ireland)
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MLR.BF
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Barnacles and fucoids (moderately exposed shores)
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same
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MNCR BioMar 96.7 (Britain & Ireland)
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MLR.FB
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same
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A
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Marine habitats
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Ancestor
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A1
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Littoral rock and other hard substrata
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Ancestor
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A1.2
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Moderate energy littoral rock
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Parent
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