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Marine Habitat Classification


Description of biotope or habitat type

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   Infralittoral fluid mobile mud


Habitat (physical) description

Salinity Variable (18-35 ppt)
Wave exposure Sheltered, Extremely sheltered
Tidal streams Moderately strong (1-3 kn), Weak (>1 kn)
Substratum Fluid mud
Zone Infralittoral
Depth Band 0-5 m
Other Features Found only on slack water

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 SS.SMu.SMuVS.MoMu Infralittoral fluid mobile 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

Fluid mobile mud suspended and deposited on each tide. In areas with very high quantities of suspended particulate material in the water column it may become deposited around slack water when tidal currents fall. This can form fluid mud layers up to several metres thick (Warwick & Uncles 1980) becoming a transient habitat in its own right. Species present within this biotope will be those washed in from other communities such as Nephtys hombergii or Capitella capitata. This biotope may be under-recorded due to sampling problems, and also where sediment descriptions are absent from field data.

Situation

It may be found adjacent to; OlVS, NhomTubi and to some extent AphTubi.

Temporal variation

No temporal data available.

Characterising Species

Taxon Relative importance of taxon for defining this community (%) % of core records where taxon was recorded
Capitella capitata 0 41-60 %
Oligochaeta 0 41-60 %

Similar biotopes

SS.SMu.SMuVS.OlVS
The more mobile muds (MoMu) may contain a reduced element of OlVS in which case only sediment description will distinguish the two biotopes.

SS.SMu.SMuVS.CapTubi
The more mobile muds (MoMu) may contain a reduced element of CapTubi in which case only sediment description will distinguish the two biotopes.

SS.SMu.SMuVS.NhomTubi
The more mobile muds (MoMu) may contain a reduced element of NhomTubi in which case only sediment description will distinguish the two biotopes.

Biotope history

Classification Habitat code
97.06 IMU.MobMud

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