EUNIS habitat classification 2012 amended 2019 > A - Marine habitats > A4 - Circalittoral rock and other hard substrata > A4.1 - Atlantic and Mediterranean high energy circalittoral rock > A4.13 - Mixed faunal turf communities on circalittoral rock > A4.136 - Suberites spp. with a mixed turf of crisiids and Bugula spp. on heavily silted moderately wave-exposed shallow circalittoral rock

Suberites spp. with a mixed turf of crisiids and Bugula spp. on heavily silted moderately wave-exposed shallow circalittoral rock

English name: Suberites spp. with a mixed turf of crisiids and Bugula spp. on heavily silted moderately wave-exposed shallow circalittoral rock

Quick facts

EUNIS habitat type code A4.136
Bern Convention Included in a Resolution 4 habitat type at a higher level (A4)

Description (English)

This biotope is found on heavily silted, moderately wave-exposed circalittoral bedrock and boulders (often limestone) that are subject to moderately strong tidal streams. A very high silt loading in the water column means that this 'circalittoral' biotope occurs at unusually shallow depths (1 - 10 m BCD). It is characterised by a mixed faunal turf and `massive' examples of the sponges Suberites ficus, Suberites carnosus and Hymeniacidon perleve. Other sponges recorded in this biotope are Cliona celata, Halichondria panicea, Esperiopsis fucorum, Raspailia ramosa, Polymastia mamillaris, Dysidea fragilis, Scypha ciliata, Stelligera rigida and Haliclona oculata. Also characteristic of this biotope is a dense bryozoan turf with one or more crisiid species, Flustra foliacea and Bugula plumosa. The polychaete Polydora spp. and the rock-boring bivalve Hiatella arctica are able to bore into the relatively soft limestone. There is an ascidian component to the biotope, with Morchellium argus and Clavelina lepadiformis among the most abundant. There may be scattered clumps of the hydroids Abietinaria abietina and Hydrallmania falcata. Other species present include the anemones Metridium senile, Sagartia elegans and Urticina felina, the starfish Asterias rubens, the crab Necora puber, the nudibranch Janolus cristatus and the soft coral Alcyonium digitatum. This biotope has currently only been recorded off the east coast of Anglesey, Wales.

Source: EUNIS habitat classification

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Abietinaria abietina
Invertebrates Alcyonium digitatum
Invertebrates Asterias rubens
Invertebrates Bugula plumosa
Invertebrates Clavelina lepadiformis
Invertebrates Cliona celata
Invertebrates Dysidea fragilis
Invertebrates Esperiopsis fucorum
Invertebrates Flustra foliacea
Invertebrates Halichondria panicea
Invertebrates Haliclona oculata
Invertebrates Hiatella arctica
Invertebrates Hydrallmania falcata
Invertebrates Janolus cristatus
Invertebrates Metridium senile
Invertebrates Necora puber
Invertebrates Polymastia mamillaris
Invertebrates Raspailia ramosa
Invertebrates Sagartia elegans
Invertebrates Stelligera rigida
Invertebrates Suberites carnosus
Invertebrates Suberites ficus
Invertebrates Urticina felina
Species scientific name English common name Species group
Abietinaria abietina Invertebrates
Alcyonium digitatum Invertebrates
Asterias rubens Invertebrates
Bugula plumosa Invertebrates
Clavelina lepadiformis Invertebrates
Cliona celata Invertebrates
Dysidea fragilis Invertebrates
Esperiopsis fucorum Invertebrates
Flustra foliacea Invertebrates
Halichondria panicea Invertebrates
Haliclona oculata Invertebrates
Hiatella arctica Invertebrates
Hydrallmania falcata Invertebrates
Janolus cristatus Invertebrates
Metridium senile Invertebrates
Necora puber Invertebrates
Polymastia mamillaris Invertebrates
Raspailia ramosa Invertebrates
Sagartia elegans Invertebrates
Stelligera rigida Invertebrates
Suberites carnosus Invertebrates
Suberites ficus Invertebrates
Urticina felina Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 CR.HCR.XFa.SubCriTf <I>Suberites</I> spp. with a mixed turf of crisiids and <I>Bugula</I> spp. on heavily silted moderately wave-exposed shallow circalittoral rock source
CORINE Land Cover 5.2.3. Sea and ocean n/a
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 200410 A4.136 Suberites spp. with a mixed turf of crisiids and Bugula spp. on heavily silted moderately wave-exposed shallow circalittoral rock same
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