Gracilechinus acutus norvegicus assemblage on Atlantic upper bathyal mud
Description (English)
This biotope consists of aggregations of Gracilechinus acutus norvegicus (previously Echinus acutus norvegicus) on mud substrate. Gage (1986) reports this assemblage from 700-1400m on pelagic ooze and suggests it is present in a ribbon-like distribution around the continental margin of Europe down to about 1400m. Le Danois also describes this assemblage from 150m-500+ but emphasises that shallower than 500m Spatangus raschi dominates and below Gracilechinus acutus norvegicus dominates. The same epifaunal assemblage is also found on sand and in the lower bathyal but associated infauna are likely to differ. Characterising species listed refer to all Gracilechinus acutus norvegicus assemblages not just those found associated with the zone and substrate specified in this biotope.
Source: EUNIS habitat classification
Quick facts
| EUNIS habitat type | code ME6212 |
|---|
Vegetation types
Relation to vegetation types (syntaxa)
Not availableSpecies mentioned in habitat description
Other classifications
| Classification | Code | Habitat type name | Relationship type |
|---|---|---|---|
| EUNIS Habitat Classification 2007 (revised descriptions 2012) | A6.2 | Deep-sea mixed substrata | narrower |
History
| Classification | Code | Habitat type name | Relationship type | Comment |
|---|---|---|---|---|
| EUNIS Habitat Classification 200410 | A6.2 | Deep-sea mixed substrata | same | |
| EUNIS Habitat Classification 200308 | A5.2 | Deep-sea mixed substrata | same | |
| EUNIS Habitat Classification 200202 | A5.2 | Deep-sea combination substrates | same | |
| EUNIS Habitat Classification 199910 | A5.2 | Bathyal zone mixed substrates | same |
