Tubularia indivisa and cushion sponges on tide-swept turbid circalittoral bedrock

English name: Tubularia indivisa and cushion sponges on tide-swept turbid circalittoral bedrock

Quick facts

EUNIS habitat type code A4.1121
Bern Convention Included in a Resolution 4 habitat type at a higher level (A4)

Description (English)

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 A4.1122. 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 (unit A3.115) may be found.

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 Balanus crenatus
Invertebrates Bicellariella ciliata
Invertebrates Bugula flabellata
Invertebrates Bugula turbinata
Invertebrates Cancer pagurus
Invertebrates Clathrina coriacea
Invertebrates Corynactis viridis
Invertebrates Dysidea fragilis
Invertebrates Esperiopsis fucorum
Invertebrates Halichondria panicea
Invertebrates Hemimycale columella
Invertebrates Henricia oculata
Invertebrates Myxilla incrustans
Invertebrates Nemertesia antennina
Invertebrates Pachymatisma johnstonia
Invertebrates Sagartia elegans
Invertebrates Sertularia argentea
Invertebrates Tubularia indivisa
Invertebrates Urticina felina
Species scientific name English common name Species group
Actinothoe sphyrodeta Invertebrates
Alcyonidium diaphanum Invertebrates
Alcyonium digitatum Invertebrates
Balanus crenatus Invertebrates
Bicellariella ciliata Invertebrates
Bugula flabellata Invertebrates
Bugula turbinata Invertebrates
Cancer pagurus Invertebrates
Clathrina coriacea Invertebrates
Corynactis viridis Invertebrates
Dysidea fragilis Invertebrates
Esperiopsis fucorum Invertebrates
Halichondria panicea Invertebrates
Hemimycale columella Invertebrates
Henricia oculata Invertebrates
Myxilla incrustans Invertebrates
Nemertesia antennina Invertebrates
Pachymatisma johnstonia Invertebrates
Sagartia elegans Invertebrates
Sertularia argentea Invertebrates
Tubularia indivisa Invertebrates
Urticina felina Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 CR.HCR.FaT.CTub.CuSp <I>Tubularia indivisa</I> and cushion sponges on tide-swept turbid 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 A4.1121 Tubularia indivisa and cushion sponges on tide-swept turbid circalittoral bedrock same
EUNIS Habitat Classification 200308 A3.532 Tubularia indivisa, sponges and other hydroids on tide-swept circalittoral bedrock same
EUNIS Habitat Classification 200308 A3.533 Balanus crenatus, Halichondria panicea and Alcyonidium diaphanum on extremely tide-swept sheltered circalittoral rock narrower
EUNIS Habitat Classification 200202 A3.532 Tubularia indivisa, sponges and other hydroids on tide-swept circalittoral bedrock narrower
EUNIS Habitat Classification 200202 A3.533 Balanus crenatus, Halichondria panicea and Alcyonidium diaphanum on extremely tide-swept sheltered circalittoral rock narrower
EUNIS Habitat Classification 199910 A3.533 Balanus crenatus, Halichondria panicea and Alcyonidium diaphanum on extremely tide-swept sheltered circalittoral rock narrower
EUNIS Habitat Classification 199910 A3.532 Tubularia indivisa, sponges and other hydroids on tide-swept circalittoral bedrock narrower
MNCR BioMar 97.06 (Britain & Ireland) ECR.BS.BalHpan Balanus crenatus, Halichondria panicea and Alcyonidium diaphanum on extremely tide-swept sheltered circalittoral rock narrower
MNCR BioMar 97.06 (Britain & Ireland) ECR.BS.TubS Tubularia indivisa, sponges and other hydroids on tide-swept circalittoral bedrock narrower
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