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Concept: [Tubularia indivisa] and cushion sponges on tide-swept turbid circalittoral bedrock in the eunishabitats vocabulary

Concept URI http://eunis.eea.europa.eu/eunishabitats/A4.1121
Preferred label [Tubularia indivisa] and cushion sponges on tide-swept turbid circalittoral bedrock
Definition This variant is typically found on the vertical and upper faces of strongly tide-swept, exposed circalittoral bedrock and boulders. It is commonly associated with areas where turbidity levels are high for much of the year, for example, around Anglesey and the Lleyn Penisula. From afar, this variant appears as a dense carpet of [Tubularia indivisa] covering tide-swept gully walls, floors and boulders. [T. indivisa] is frequently observed growing through sheets of sponges such as [Myxilla incrustans] and [Halichondria panicea] as well as through dense patches of the barnacle [Balanus crenatus] and tubes of the amphipod [Jassa] spp. Several other species of sponge appear to be tolerant of the high turbidity in areas where this variant occurs, many of which are common in other biotopes. These include [Esperiopsis fucorum], [Pachymatisma johnstonia], [Hemimycale columella], [Dysidea fragilis] and [Clathrina coriacea]. Robust hydroids (other than [T. indivisa]) such as [Nemertesia antennina] and [Sertularia argentea] occur in patches. The anemones [Urticina felina], [Actinothoe sphyrodeta] and [Sagartia elegans] are typically common. A short bryozoan turf consisting of crisiid bryozoans, [Alcyonidium diaphanum], [Bicellariella ciliata], [Bugula turbinata] and [Bugula flabellata] may be present. [Alcyonium digitatum] may occasionally be seen although it doesn't tend to be as dominant as in CTub.Adig. Individual [Corynactis viridis] may be seen scattered across the gully walls and boulders. The starfish [Henricia oculata] may be seen on boulders and gully floors whilst typical under-boulder fauna includes the crab [Cancer pagurus]. Situation: Above this biotope, [Laminaria] forest (LhypR) may be found.
Notation A4.1121
Status Valid
Status Modified 2014-01-31
Accepted Date 2014-01-31
Not Accepted Date
Has broader
Has exact match