JNCC is a statutory adviser to UK Government and devolved administrations
  Home  >  Marine  >  Marine Habitats  >  Habitat  >  Biotope classification


LS.LSa.MoSa.BarSa
Barren littoral coarse sand

Full Hierarchy  >>  LS >>  LS.LSa >>  LS.LSa.MoSa >>  LS.LSa.MoSa.BarSa

Habitat (physical) description

Distribution

 Salinity: Full (30-35 ppt), Variable (18-35 ppt) 
 Wave exposure: Very exposed, Exposed, Moderately exposed 
 Tidal streams:  
 Substratum: coarse to fine sand 
 Zone:  
 Depth Band: Lower shore, Mid shore, Upper shore 
 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:
LGS.S.BarSnd - Version: 97.06
LSND.BAR - Version: 6.95

Distribution of habitat LS.LSa.MoSa.BarSa  Barren littoral coarse sand
Distribution of habitat LS.LSa.MoSa.BarSa Barren littoral coarse 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

Freely-draining sandy beaches, particularly on the upper and mid shore, which lack a macrofaunal community due to their continual mobility. Trial excavations are unlikely to reveal any macrofauna in these typically steep beaches on exposed coasts. Oligochaetes, probably mainly enchytraeids, and the isopod Eurydice pulchra may be found in extremely low abundances, but if present in any quantity should be classed as Ol or AmSco.Eur. Burrowing amphipods (Bathyporeia spp.) may be present on very rare occasions. Occasionally, other species may be left behind in low abundance by the ebbing tide.

Situation

BarSa may occur on the mid and/or lower shore below BarSh in exposed conditions. In moderately exposed conditions, and where BarSa occurs on the upper shore, a range of relatively more species-rich clean sand communities may occur on the mid and lower shore. These include AmSco, Ol, and Po, depending on the degree of wave exposure and sediment mobility. Tal may occur on the same shore as BarSa, where driftlines of algae and other debris accumulate on the upper shore.

Temporal variation

Not known.

Similar biotopes

LS.LCS.Sh.BarShSimilar physical environment, differentiated solely on the basis of larger sediment particle size.
LS.LSa.MoSa.OlOccurs in similar sediment types but in slightly more sheltered conditions. Oligochaetes occur in relatively high densities.
LS.LSa.MoSa.AmSco.ScoOccurs in slightly more sheltered conditions. The fauna is poor, characterised by the polychaetes Scolelepis squamata and S. foliosa.
LS.LSa.MoSa.AmSco.PonOccurs in more sheltered conditions, in sediments with a slightly higher proportion of fine sands. The infauna is more diverse, with the crustaceans Bathyporeia spp. and Pontocrates arenarius common.
LS.LSa.MoSa.AmSco.EurOccurs in more sheltered conditions, in sediments with a slightly higher proportion of fine sand. The infauna is more diverse, with the crustaceans Bathyporeia spp. and Eurydice spp. common.

Characterising Species

Taxa Frequency Typical Abundance % Contribution to similarity Abundance (no.2)
Nemertea P 52 17
Oligochaeta P 15 18
Eurydice pulchra P 26 6

Example photographs of biotope


Mobile sand shore with LSA.MOSA.BarSa on the upper shore., W Peffer Sands, North Berwick., Rohan Holt, © JNCC
Click on an image for a larger view


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