Sponges and anemones on vertical circalittoral bedrock

English name: Sponges and anemones on vertical circalittoral bedrock

Quick facts

EUNIS habitat type code A4.139
Bern Convention Included in a Resolution 4 habitat type at a higher level (A4)

Description (English)

This biotope is found on exposed to moderately wave exposed , vertical and overhanging, circalittoral bedrock, subject to strong through to weak tidal streams. This biotope is characterised by a mixed faunal turf of hydroids (Nemertesis antennina, Tubularia indivisa and Halecium halecium) and bryozoans (Alcyonidium diaphanum and crisiid turf). There is frequently a diverse range of sponges recorded, including Cliona celata, Pachymatisma johnstonia, Dysidea fragilis and Hemimycale columella. There may be dense aggregation of dead mans fingers Alcyonium digitatum along with clumps of the cup coral Caryophyllia smithii, and the anthozoans Corynactis viridis, Actinothoe sphyrodeta, Sagartia elegans and Metridium senile. Other species present include the echinoderms Echinus esculentus, Asterias rubens, Marthasterias glacialis, Henricia oculata, Holothuria forskali and Antedon bifida, clumps of the lightbulb tunicate Clavelina lepadiformis and the top shell Calliostoma zizyphinum. Three regional variations of this biotope have been recorded. The first variant is characterised by a Bugula turf along with the pink sea fan Eunicella verrucosa, and has been recorded from around southwest England and Wales. The second variant, characterised by a dense 'carpet' of Corynactis viridis and Metridium senile has been recorded predominantly from the west coast of Ireland. The final variant is characterised by a very diverse, dense faunal turf of hydroids, bryozoans and ascidians and has been recorded from the coasts around Northern Ireland.

Source: EUNIS habitat classification

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Actinothoe sphyrodeta
Invertebrates Alcyonidium diaphanum
Invertebrates Alcyonium digitatum
Invertebrates Antedon bifida
Invertebrates Asterias rubens
Invertebrates Calliostoma zizyphinum
Invertebrates Caryophyllia smithii
Invertebrates Clavelina lepadiformis
Invertebrates Cliona celata
Invertebrates Corynactis viridis
Invertebrates Dysidea fragilis
Invertebrates Echinus esculentus
Invertebrates Eunicella verrucosa
Invertebrates Halecium halecium
Invertebrates Hemimycale columella
Invertebrates Henricia oculata
Invertebrates Holothuria forskali
Invertebrates Marthasterias glacialis
Invertebrates Metridium senile
Invertebrates Pachymatisma johnstonia
Invertebrates Sagartia elegans
Invertebrates Tubularia indivisa
Species scientific name English common name Species group
Actinothoe sphyrodeta Invertebrates
Alcyonidium diaphanum Invertebrates
Alcyonium digitatum Invertebrates
Antedon bifida Invertebrates
Asterias rubens Invertebrates
Calliostoma zizyphinum Invertebrates
Caryophyllia smithii Invertebrates
Clavelina lepadiformis Invertebrates
Cliona celata Invertebrates
Corynactis viridis Invertebrates
Dysidea fragilis Invertebrates
Echinus esculentus Invertebrates
Eunicella verrucosa Invertebrates
Halecium halecium Invertebrates
Hemimycale columella Invertebrates
Henricia oculata Invertebrates
Holothuria forskali Invertebrates
Marthasterias glacialis Invertebrates
Metridium senile Invertebrates
Pachymatisma johnstonia Invertebrates
Sagartia elegans Invertebrates
Tubularia indivisa Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 CR.HCR.XFa.SpAnVt Sponges and anemones on vertical circalittoral bedrock 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 A4.139 Sponges and anemones on vertical circalittoral bedrock same
EUNIS Habitat Classification 200308 A3.692 Bugula spp. and other bryozoans on vertical moderately exposed circalittoral rock overlap
EUNIS Habitat Classification 200308 A3.691 Antedon bifida and a bryozoan/hydroid turf on steep or vertical circalittoral rock narrower
EUNIS Habitat Classification 200308 A3.69 Faunal turfs on vertical circalittoral rock wider
EUNIS Habitat Classification 200202 A3.69 Faunal turfs on vertical circalittoral rock overlap
EUNIS Habitat Classification 199910 A3.69 Faunal turfs on vertical circalittoral rock overlap
EUNIS Habitat Classification 199811 A3.68 Faunal turfs on deep vertical circalittoral rock overlap
MNCR BioMar 97.06 (Britain & Ireland) CR.FaV Faunal turfs (deep vertical rock) overlap
MNCR BioMar 97.06 (Britain & Ireland) CR.FaV.Bug Bugula spp. and other bryozoans on vertical moderately exposed circalittoral rock overlap
MNCR BioMar 97.06 (Britain & Ireland) CR.FaV.Ant Antedon bifida and a bryozoan/hydroid turf on steep or vertical circalittoral rock overlap
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