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Marine Habitat Classification


Description of biotope or habitat type

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   Geodia and other massive sponges on Atlanto-Arctic upper bathyal mixed sediment


Habitat (physical) description

Salinity Full (30-35 ppt)
Wave exposure
Tidal streams
Substratum Mixed sediment
Zone Atlanto-Arctic upper bathyal
Depth Band Biotope depth range 300 - 600 m (based on zone); assemblage recorded from 400 - 600 m; most common depth 500 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.AAUB.Mx.DeeSpo.GeoSpo <i>Geodia</i> and other massive sponges on Atlanto-Arctic upper bathyal mixed sediment

  • 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 biotope has been found at approximately 500m on the eastern slopes of the Faroe-Shetland Channel, it principally consists of rather small sponge specimens but that practically carpet the seafloor. Large sponges (tens of centimetres in diameter) are however common. The area where the community is observed experiences temperature fluctuations between <0°C to >8°C and heightend current speeds as a result of internal tides between Arctic and Atlantic environmental data. This assemblage is also known as Boreal Ostur. The same assemblage was recorded on sand substrate, but associated infaunal species are likely to differ. Characterising species listed refer to all Geodia and other massive sponge assemblages not just those found associated with the zone and substrate specified in this biotope.

Situation

No situation data available.

Temporal variation

No temporal variation data available.

Characterising Species

Taxon
Geodia barretti
Geodia macandrewi
Geodia atlantica
Geodia phlegraei
Stryphnus ponderosus
Stelletta normani

Similar biotopes

M.AAUB.Co.DeeSpo.GeoSpo
The same epifaunal assemblage on coarse sediment.

Photos

M.AAUB.Mx.DeeSpo.GeoSpo Geodia and other massive sponges on Atlanto-Arctic upper bathyal mixed sediment, West Shetland Channel. ANON © MSS/JNCC/University of Plymouth
M.AAUB.Mx.DeeSpo.GeoSpo Geodia and other massive sponges on Atlanto-Arctic upper bathyal mixed sediment, West Shetland Channel. ANON © MSS/JNCC/University of Plymouth

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