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Marine Habitat Classification


Description of biotope or habitat type

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   Urchin dominated community on Atlantic upper abyssal mud


Habitat (physical) description

Salinity Full (30-35 ppt)
Wave exposure
Tidal streams
Substratum Mud
Zone Atlantic upper abyssal
Depth Band 2300 - 3000 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 M.AtUA.Mu.UrcCom Urchin dominated community on Atlantic upper abyssal mud

  • 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

This broad community contains biotopes that are dominated by urchins and occurs on sediment. The species of urchin and associated species varies with depth and substrate type. On Atlantic upper abyssal mud only Gracilechinus alexandri, Psilaster and Plinthastera assemblages have been recorded to date. Associated taxa include seastars, burrowing crustaceans and holothurians.

Situation

No situation data available.

Temporal variation

No temporal variation data available.

Characterising Species

Characterising species data not applicable.

Similar biotopes

M.AtMB.Mu.UrcCom
The same epifaunal broad community occuring in the mid bathyal. The species of urchin will differ - Gracilechinus acutus replaces Gracilechinus alexandri. Associated infauna are likely to differ.

M.AtLB.Mu.UrcCom
The same epifaunal broad community occuring in the lower bathyal. The species of urchin may differ - both Gracilechinus alexandri and Gracilechinus acutus are found in the lower bathyal. Associated infauna are likely to differ.

M.AtUB.Sa.UrcCom
The same epifaunal broad community occuring in the upper bathyal on sand. The species of urchin will differ - cidarid urchins and Gracilechinus acutus can be found on sand. Associated infauna are likely to differ.

M.AtMB.Sa.UrcCom
The same epifaunal broad community occuring in the mid bathyal on sand. The species of urchin will differ - cidarid urchins and Gracilechinus acutus can be found on sand. Associated infauna are likely to differ.

M.AtLB.Sa.UrcCom
The same epifaunal broad community occuring in the lower bathyal on sand. The species of urchin will differ - Gracilechinus acutus can be found on lower bathyal sand. Associated infauna are likely to differ.

M.AtUB.Co.UrcCom
The same epifaunal broad community occuring in the upper bathyal on coarse sediment. The species of urchin will differ - cidarid urchins can be found on coarse sediment. Associated infauna are likely to differ.

M.AtMB.Co.UrcCom
The same epifaunal broad community occuring in the mid bathyal on coarse sediment. The species of urchin will differ - cidarid urchins can be found on coarse sediment. Associated infauna are likely to differ.


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