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Marine Habitat Classification


Description of biotope or habitat type

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   Circalittoral coarse sediment


Habitat (physical) description

Salinity Full (30-35 ppt)
Wave exposure Exposed, Moderately exposed
Tidal streams Moderately strong (1-3 kn), Weak (>1 kn), Very weak (negligible)
Substratum Coarse sand and gravel with a minor finer sand fraction
Zone Infralittoral - lower, Circalittoral
Depth Band 10-20 m, 20-30 m, 30-50 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.SCS.CCS Circalittoral coarse sediment

  • Records used to define the biotope (core records)
  • Other records assigned to this biotope, marked as 'certain'
  • Other records assigned to this biotope, marked as 'uncertain'
  • Predicted extent of the level 3 (for sublittoral rock & deep sea) or 4 (for sublittoral sediment) habitat

Point data based on records in the UK Marine Recorder Snapshot. Predicted habitat extent is from UKSeaMap.

Description

Tide-swept circalittoral coarse sands, gravel and shingle generally in depths of over 15-20m. This habitat may be found in tidal channels of marine inlets, along exposed coasts and offshore. This habitat, as with shallower coarse sediments, may be characterised by robust infaunal polychaetes, mobile crustacea and bivalves. Certain species of sea cucumber (e.g. Neopentadactyla) may also be prevalent in these areas along with the lancelet Branchiostoma lanceolatum.

Situation

No situation data available.

Temporal variation

No temporal data available.

Characterising Species

Taxon Relative importance of taxon for defining this community (%) Typical abundance - SACFOR scale % of core records where taxon was recorded
Nemertesia antennina 2 Occasional 21-40 %
Cerianthus lloydii 2 Occasional 21-40 %
Nemertea 11 Common 61-80 %
Nematoda 3 21-40 %
Pholoe synophthalmica 3 21-40 %
Hesionura elongata 1 21-40 %
Glycera lapidum 9 Frequent 41-60 %
Nereis longissima 2 21-40 %
Lumbrineris gracilis 2 Common 21-40 %
Protodorvillea kefersteini 12 61-80 %
Scoloplos armiger 2 21-40 %
Minuspio cirrifera 4 21-40 %
Spiophanes bombyx 2 Frequent 21-40 %
Chaetopterus variopedatus 2 Occasional 21-40 %
Caulleriella zetlandica 5 21-40 %
Mediomastus fragilis 4 41-60 %
Notomastus latericeus 1 21-40 %
Owenia fusiformis 1 21-40 %
Sabellaria spinulosa 2 21-40 %
Terebellidae 1 21-40 %
Lanice conchilega 1 21-40 %
Lanice conchilega 6 Occasional 21-40 %
Pomatoceros triqueter 10 Frequent 21-40 %
Ampelisca spinipes 5 Frequent 41-60 %
Pagurus bernhardus 4 Occasional 21-40 %
Pecten maximus 4 Occasional 21-40 %
Abra alba 1 Frequent 21-40 %
Asterias rubens 10 Occasional 41-60 %
Ophiura albida 5 Frequent 21-40 %
Echinus esculentus 3 Occasional 21-40 %
Echinocyamus pusillus 3 Common 21-40 %
Neopentadactyla mixta 29 Frequent 41-60 %

Similar biotopes

Not applicable or unknown.


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