Description of biotope or habitat type
Psycropotes longicauda and Oneirophanta mutabilis assemblage on Atlantic mid abyssal mud
Physical habitat description
|Salinity||Full (30-35 ppt)|
|Substratum||Mud - pelagic ooze|
|Zone||Atlantic mid abyssal|
|Depth Band||Biotope depth range 3100 - 4100 m (based on zone); assemblage recorded from 3650 - 5000 m|
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- 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 assemblages dominated by holothurians Psycropotes longicauda and Oneirophanta mutabilis on mud. Lavaleye et al. (2002) describe this assemblage from their two deepest stations at 3650 and 4500 m at the base of the Pendragon Escarpment, presumably on pelagic ooze. Billett et al. (2001) describe holothurians as dominating the megafaunal biomass at approximately 5000 m on the Porcupine Abyssal Plain and cite Psychropotes longicauda and Oneirophanta mutabilis, together with Molpadiodemas villosus as contributing substantially to the total holothurian biomass. This assemblage was described based on literature only.
No situation data available.
No temporal variation data available.
|Taxon||% of core records where taxon was recorded|
Similar biotopes or habitat types
Classification history of this biotope or habitat type