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SS.SBR.SMus.MytSS
Mytilus edulis beds on sublittoral sediment

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Habitat (physical) description

Distribution

 Salinity: Full (30-35 ppt) 
 Wave exposure: Moderately exposed, Sheltered 
 Tidal streams: Moderately strong (1-3 kn) 
 Substratum: Mixed muddy sediment 
 Zone: Circalittoral, Infralittoral 
 Depth Band: 0-5 m, 5-10 m, 10-20 m 
 Other Features:  

Download comparative physical and biological data. The comparative tables enable a rapid comparison of the species composition and principal physical characteristics between a given set of biotopes.

Previous code

This biotope occurred in previous versions of the classification as:
IMX.MytV - Version: 97.06

Distribution of habitat SS.SBR.SMus.MytSS  Mytilus edulis beds on sublittoral sediment
Distribution of habitat SS.SBR.SMus.MytSS Mytilus edulis beds on sublittoral sediment, based on records on the UK Marine Recorder database and EUSeaMap. Red dots represent records on which the biotope is based. Blue dots show other certain records, black dots show records tentatively assigned to this biotope. Yellow areas show level 2 and 3 sublittoral and deep-sea habitats prediced by EUSeaMap within UK waters.

Biotope description

Shallow sublittoral mixed sediment, in fully marine coastal habitats or sometimes in variable salinity conditions in the outer regions of estuaries, are characterised by beds of the common mussel Mytilus edulis. Other characterising infaunal species may include the amphipod Gammarus salinus and oligochaetes of the genus Tubificoides. The polychaetes Harmothoe spp., Kefersteinia cirrata and Heteromastus filiformis are also important. Epifaunal species in addition to the M. edulis include the whelks Nucella lapillus and Buccinum undatum, the common starfish Asterias rubens the spider crab Maja squinado and the anemone Urticina felina. Relatively few records are available for this biotope and it is possible that as more data is accumulated separate estuarine and fully marine sub-biotopes may be described. Further clarification may also be required with regard to the overlap between littoral and sublittoral mussel beds and with regard to mussel beds biotopes on hard substratum.

Situation

No situation data available.

Temporal variation

No temporal data available.

Similar biotopes

LS.LBR.LMus.MytMytSS may be an extension of the littoral biotope Myt
SS.SMx.SMxVS.AphPolAphPol may be separated from MytSS by the dominance of M. edulis in 'beds' rather than scattered individuals. Care must be taken with data to ensure juvenile spat recruitments are not classified as mussel beds.

Characterising Species

Taxa Frequency Typical Abundance % Contribution to similarity Abundance (no.2)
Anthozoa A 2 35
Urticina felina O 7
Actinothoe sphyrodeta O 2
Turbellaria F 2 24
Nemertea A 6 123
Harmothoe imbricata S 2 20
Harmothoe impar A 4 69
Pholoe inornata C 1 39
Eteone longa A 2 48
Kefersteinia cirrata S 2 36
Nereididae P 1 9
Scoloplos armiger A 1 63
Capitella capitata C 2 62
Heteromastus filiformis C 3 95
Pomatoceros triqueter A 2 58
Oligochaeta A 15 1966
Cirripedia C 2 55
Gammarus salinus S 11 1531
Paguridae O 1
Pagurus bernhardus F 3
Maja squinado F 6
Cancer pagurus O 4
Necora puber O 2
Crepidula fornicata O 1
Nucella lapillus C 2 34
Buccinum undatum O 1
Mytilus edulis A 60
Mytilus edulis S 25 3488
Flustra foliacea O 1
Asterias rubens O 3
Asterias rubens A 2 22
Pleuronectes platessa R 2

Example photographs of biotope

No characteristic photos currently available. If you are able to provide a photograph of this biotope please contact .


Version 15.03 of the classification adds a deep-sea section to version 04.05; therefore superseding version 04.05, 97.06 and 03.02.

This online classification should be cited as:

JNCC (2015) The Marine Habitat Classification for Britain and Ireland Version 15.03 [Online]. [Date accessed]. Available from: jncc.defra.gov.uk/MarineHabitatClassification

Information from the shallower section (up to sublittoral sediment, taken from Version 04.05) be cited as the report accompanying Version 04.05, as follows:

CONNOR, D.W., J.H. ALLEN, N.GOLDING, K.L.HOWELL, L.M. LIEBERKNECHT, K.O. NORTHEN AND J.B. REKER (2004) The Marine Habitat Classification for Britain and Ireland Version 04.05. In: JNCC (2015) The Marine Habitat Classification for Britain and Ireland Version 15.03 [Online]. [Date accessed].
Available from: jncc.defra.gov.uk/MarineHabitatClassification
ISBN 1 861 07561 8


Information from the deep-sea section (added in March 2015) should be cited as the report accompanying the deep-sea section, as follows:

PARRY, M.E.V., K.L. HOWELL, B.E. NARAYANASWAMY, B.J. BETT, D.O.B. JONES, D.J. HUGHES, N. PIECHAUD, T.D. NICKELL, H. ELLWOOD, N. ASKEW, C. JENKINS and E. MANCA (2015) A Deep-sea Section for the Marine Habitat Classification of Britain and Ireland. JNCC report 530. In: JNCC (2015) The Marine Habitat Classification for Britain and Ireland Version 15.03 [Online]. [Date accessed].
Available from: jncc.defra.gov.uk/MarineHabitatClassification
ISSN 0963 8901