Description of biotope or habitat type
Gracilechinus alexandri, Psilaster and Plinthaster assemblage on Atlantic upper abyssal mud
Habitat (physical) description
|Salinity||Full (30-35 ppt)|
|Substratum||Mud - pelagic ooze and terbidite|
|Zone||Atlantic upper Abyssal|
|Depth Band||Biotope depth range 2000 - 3000 m (based on zone); assemblage recorded from 1400 - 2500 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
This biotope consists of urchin Gracilechinus alexandri with seastars on mud substrate. Gage (1986) describes an assemblage from the continental slope west of the Hebrides (Rockall Trough) between 1400 and 2500m on pelagic ooze and terbidite dominated by echinoderms. The same epifaunal assemblage is also found in the lower bathyal but associated infauna are likely to differ. Characterising species listed refer to all Gracilechinus alexandri, Psilaster and Plinthaster assemblages not just those found associated with the zone and substrate specified in this biotope.
No situation data available.
No temporal variation data available.