Ascidiella aspersa on circalittoral artificial substrata

English name: Ascidiella aspersa on circalittoral artificial substrata

Description (English)

Sheltered artificial substrata (such as discarded fishing nets or scrap metal on muddy sediment plains), sometimes subject to variable salinity, with high numbers of the ascidian Ascidiella aspersa which is capable of rapidly colonising hard substrata. Other species that are quickly able to take advantage of such substrata include the dahlia anemone Urticina felina and the plumose anemone Metridium senile. The edible crab Cancer pagurus, the velvet swimming crab Necora puber and the shore crab Carcinus maenas may occasionally be found hiding under the discarded nets, lobster pots or anchor chains.
Situation: As a fouling community, this biotope may be found throughout the circalittoral zone in coastal waters. It may be more prevalent around harbours, moorings, and fishing grounds where suitable substratum is available. In situations where wave exposure or tidal stream increase, biotopes dominated by bryozoans and/or robust hydroids (unit A4.21) may arise.
Temporal variation: A gradual development of more long-lived species is expected, where the artificial substrata are of a more permanent nature (e.g. wooden or concrete pier pilings).

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A4.722
Bern Convention Included in a Resolution 4 habitat type at a higher level (A4)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Ascidiella aspersa
Invertebrates Cancer pagurus
Invertebrates Carcinus maenas
Invertebrates Metridium senile
Invertebrates Necora puber
Invertebrates Urticina felina
Species scientific name English common name Species group
Ascidiella aspersa Invertebrates
Cancer pagurus Invertebrates
Carcinus maenas Invertebrates
Metridium senile Invertebrates
Necora puber Invertebrates
Urticina felina Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 CR.FCR.FouFa.Aasp <I>Ascidiella aspersa</I> on circalittoral artificial substrata 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 A4.722 Ascidiella aspersa on circalittoral artificial substrata same
EUNIS Habitat Classification 200308 A3.714 Ascidiella aspersa fouling community on circalittoral artificial substrata same
EUNIS Habitat Classification 200202 A3.714 Ascidiella aspersa on sheltered circalittoral rocks on muddy sediment same
EUNIS Habitat Classification 199910 A3.714 Ascidiella aspersa on sheltered circalittoral rocks on muddy sediment same
MNCR BioMar 97.06 (Britain & Ireland) SCR.BrAs.Aasp Ascidiella aspersa on sheltered circalittoral rocks on muddy sediment same
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