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SS.SSa.IFiSa.NcirBat
Nephtys cirrosa and Bathyporeia spp. in infralittoral sand

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Habitat (physical) description

Distribution

 Salinity: Full (30-35 ppt) 
 Wave exposure: Exposed, Moderately exposed 
 Tidal streams: Weak (>1 kn), Very weak (negligible) 
 Substratum: Medium to very fine sand 
 Zone: Infralittoral 
 Depth Band: 0-5 m, 5-10 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.
Distribution of habitat SS.SSa.IFiSa.NcirBat  Nephtys cirrosa and Bathyporeia spp. in infralittoral sand
Distribution of habitat SS.SSa.IFiSa.NcirBat Nephtys cirrosa and Bathyporeia spp. in infralittoral sand, 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

Well-sorted medium and fine sands characterised by Nephtys cirrosa and Bathyporeia spp. (and sometimes Pontocrates spp.) which occur in the shallow sublittoral to at least 30 m depth. This biotope occurs in sediments subject to physical disturbance, as a result of wave action (and occasionally strong tidal streams). The magelonid polychaete Magelona mirabilis may be frequent in this biotope in more sheltered, less tideswept areas whilst in coarser sediments the opportunistic polychaete Chaetozone setosa may be commonly found. The faunal diversity of this biotope is considerably reduced compared to less disturbed biotopes (such as FfabMag) and for the most part consists of the more actively-swimming amphipods. Sand eels Ammodytes sp. may occasionally be observed in association with this biotope (and others) and spionid polychaetes such as Spio filicornis and S. martinensis may also be present. Occasional Lanice conchilega may be visible at the sediment surface.

Situation

No situation data available.

Temporal variation

Stochastic recruitment events in the Nephtys cirrosa populations may be very important to the population size of other polychaetes present and may therefore create a degree of variation in community composition (Bamber 1994).

Similar biotopes

SS.SSa.SSaVS.NcirMacThe current biotope is very similar to NcirMac, which occurs in reduced/variable salinities with additional reduced salinity fauna.
LS.LSa.MoSa.AmSco.PonAmSco.Pon is closely allied to NcirBat but occurs in the intertidal zone
LS.LSa.FiSa.PoPo is closely allied to NcirBat but occurs in the intertidal zone
SS.SSa.IFiSa.IMoSaAs sediment disturbance increases NcirBat may grade into IMoSa with only the most robust species able to tolerate the mobile sand environment
SS.SSa.IMuSa.FfabMagAs sediment disturbance decreases and the finer silt fraction can begin to sediment out of the water column NcirBat may grade into the muddy sand biotope FfabMag.

Characterising Species

Taxa Frequency Typical Abundance % Contribution to similarity Abundance (no.2)
Polychaeta P 4
Nephtys cirrosa C 43 40
Nephtys hombergii P 1 4
Scoloplos armiger P 1 4
Spio filicornis F 1 14
Spio martinensis P 1 23
Spiophanes bombyx P 2 7
Magelona mirabilis F 15 38
Chaetozone setosa C 5 16
Lanice conchilega O 57
Pontocrates arenarius F 2 16
Bathyporeia elegans F 14 140
Bathyporeia guilliamsoniana F 5 18
Crangon crangon R 5
Pagurus bernhardus O 8
Liocarcinus depurator O 8
Fabulina fabula P 1 5
Echinocardium cordatum P 4
Ammodytes tobianus R 8
Pomatoschistus O 8

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