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Concept: [Neocrania anomala] and [Protanthea simplex] on very wave-sheltered circalittoral rock in the eunishabitats vocabulary

Concept URI http://eunis.eea.europa.eu/eunishabitats/A4.3141
Preferred label [Neocrania anomala] and [Protanthea simplex] on very wave-sheltered circalittoral rock
Definition This variant typically occurs on deep, lower circalittoral bedrock or boulder slopes (often-vertical walls) in the landward, very sheltered basins of fjordic sealochs. In these very sheltered conditions, there are frequently dense populations of the anemone [Protanthea simplex] growing on the silty boulder or rock slope, and on the tubes of the parchment worm [Chaetopterus variopedatus]. The underlying rock surfaces are usually covered with encrusting red algae, the polychaete [Pomatoceros triqueter], the brachiopod [Neocrania anomala], the saddle oyster [Pododesmus patelliformis] and the conspicuous fan worm [Sabella pavonina]. Scattered colonies of [Alcyonium digitatum] are occasionally present along with the hydroid [Bougainvillia ramosa]. The barnacle [Balanus balanus] and the hermit crab [Pagurus bernhardus] is occasionally seen on boulder or rock surface, whilst underneath in crevices, the squat lobster [Munida rugosa] may be present. A diverse range of solitary ascidians, typically found in sheltered conditions, are often present including [Ciona intestinalis], [Corella parallelogramma], [Polycarpa pomaria], [Ascidia mentula] and [Ascidia virginea]. Echinoderms such as brittlestars [Ophiothrix fragilis] are frequently seen with their arms protruding from crevices in the rock, whilst the starfish [Asterias rubens], the sea urchin [Echinus esculentus] and [Psammechinus miliaris] are occasionally found on the boulder or rock surface. The whelk [Buccinum undatum] is often present but in very low numbers. Situation: Where this biotope occurs on vertical rock cliffs, you tend to find silted sugar kelp [Laminaria saccharina] communities above NeoPro, in the infralittoral zone (Lsac). Where NeoPro occurs on a rock or boulder slope and due to the very sheltered nature of the habitat, it is common to find a mud plain community where slope ends (CMU). Species such as the seapen [Funiculina quadrangularis], the anemone [Cerianthus lloydii] and the Norway lobster [Nephrops norvegicus] are typically abundant.
Notation A4.3141
Status Valid
Status Modified 2014-01-31
Accepted Date 2014-01-31
Not Accepted Date
Has broader
Has exact match