Description of biotope or habitat type
Sublittoral coarse sediment (unstable cobbles and pebbles, gravels and coarse sands)
Physical habitat description
|Salinity||Full (30-35 ppt), Variable (18-35 ppt)|
|Wave exposure||Exposed, Moderately exposed, Sheltered|
|Tidal streams||Strong (3-6 kn), Moderately strong (1-3 kn), Weak (>1 kn), Very weak (negligible)|
|Substratum||Cobbles and pebbles, gravels and coarse sands.|
|Depth Band||0-5 m, 5-10 m, 10-20 m, 20-30 m|
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.
- 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
Coarse sediments including coarse sand, gravel, pebbles, shingle and cobbles which are often unstable due to tidal currents and/or wave action. These habitats are generally found on the open coast or in tide-swept channels of marine inlets. They typically have a low silt content and a lack of a significant seaweed component. They are characterised by a robust fauna including venerid bivalves.
No situation data available.
No temporal data available.
Characterising species data not applicable.
Similar biotopes or habitat types
Not applicable or unknown.
Classification history of this biotope or habitat type
|97.06||CGS in part|
|97.06||IGS in part|