EUNIS habitat classification 2012 amended 2019 > A - Marine habitats > A5 - Sublittoral sediment > A5.3 - Sublittoral mud > A5.36 - Circalittoral fine mud > A5.363 - Brissopsis lyrifera and Amphiura chiajei in circalittoral mud

Brissopsis lyrifera and Amphiura chiajei in circalittoral mud

English name: Brissopsis lyrifera and Amphiura chiajei in circalittoral mud

Description (English)

Mud in deep offshore, or shallower stable nearshore, waters can be characterised by the urchin Brissopsis lyrifera and the brittle star Amphiura chiajei. Where intense benthic dredge fishing activity occurs, populations of the indicator species, Brissopsis lyrifera may be depressed, although broken tests may still remain (E.I.S. Rees pers. comm. 1997; M. Costello pers. comm. 1997). Low numbers of the seapen Virgularia mirabilis may be found in many examples of this biotope. In addition, in certain areas of the UK such as the northern Irish Sea, this community may also contain Nephrops norvegicus and can consequently be the focus for fishing activity (Mackie, Oliver & Rees 1995). Infaunal species in this community are similar to those found in A5.361 and include the polychaetes Nephtys hystricis, Pectinaria belgica, Glycera spp. and Lagis koreni and the bivalves Myrtea spinifera and Nucula sulcata. This community is the 'Boreal Offshore Mud Association' and 'Brissopsis - Chiajei' communities described by other workers (Petersen 1918; Jones 1950).

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A5.363
Bern Convention Included in a Resolution 4 habitat type at a higher level (A5)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Amphiura chiajei
Invertebrates Brissopsis lyrifera
Invertebrates Myrtea spinifera
Invertebrates Nephrops norvegicus
Invertebrates Nephtys hystricis
Invertebrates Nucula sulcata
Invertebrates Pectinaria belgica
Invertebrates Virgularia mirabilis
Species scientific name English common name Species group
Amphiura chiajei Invertebrates
Brissopsis lyrifera Invertebrates
Myrtea spinifera Invertebrates
Nephrops norvegicus Invertebrates
Nephtys hystricis Invertebrates
Nucula sulcata Invertebrates
Pectinaria belgica Invertebrates
Virgularia mirabilis Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 SS.SMu.CFiMu.BlyrAchi <I>Brissopsis lyrifera</I> and <I>Amphiura chiajei</I> in circalittoral mud 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 A5.363 Brissopsis lyrifera and Amphiura chiajei in circalittoral mud same
EUNIS Habitat Classification 200308 A4.361 Brissopsis lyrifera and Amphiura chiajei in circalittoral mud same
EUNIS Habitat Classification 200202 A4.361 Brissopsis lyrifera and Amphiura chiajei in circalittoral mud same
EUNIS Habitat Classification 199910 A4.361 Brissopsis lyrifera and Amphiura chiajei in circalittoral mud same
MNCR BioMar 97.06 (Britain & Ireland) CMU.BriAchi Brissopsis lyrifera and Amphiura chiajei in circalittoral mud same
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