Description of biotope or habitat type
Atlantic mid abyssal sand
Physical habitat description
|Salinity||Full (30-35 ppt)|
|Zone||Atlantic mid abyssal|
|Depth Band||3100 - 4100 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
Deep-sea sand sediments have a diverse infaunal community dominated by polychaetes. Epifauna tend to be sparse, mobile species, or burrowing fauna such as anemones and brittlestars visible at the surface. In the absence of ecological data, sand habitat can be defined according to Long (2006), which describes the classification's broad sediment types according to the relative proportion of mud, sand and gravel (see p3 of UKSeaMap 2010 technical report 3 http://jncc.defra.gov.uk/pdf/UKSeaMap2010_TechnicalReport_3_Substrate2.pdf). It can be difficult to reliably distinguish between mud and sand using video data only. Note that muddy sand sediments are classed as mud if the mud content is great enough. If sediment particles are large enough to be classed as gravel using the Folk classification, then sediment would be classed as coarse sediment rather than sand. If sand contains a high enough percentage of gravel it is also classed as coarse sediment.
No situation data available.
No temporal variation data available.
Characterising species data not applicable.
Similar biotopes or habitat types
Not applicable or unknown.