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Marine Habitat Classification


Description of biotope or habitat type

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   Cordylophora caspia and Electra crustulenta on reduced salinity infralittoral rock


Habitat (physical) description

Salinity Reduced (18-30ppt), Low (<18ppt)
Wave exposure Very sheltered, Extremely sheltered
Tidal streams Strong (3-6 kn), Moderately strong (1-3 kn)
Substratum Boulders; cobbles
Zone Infralittoral
Depth Band 0-5 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 IR.LIR.IFaVS.CcasEle <I>Cordylophora caspia</I> and <I>Electra crustulenta</I> on reduced salinity infralittoral rock

  • 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

Shallow sublittoral rock in the upper estuary of one of the south-west inlets (Tamar) with very high turbidity and therefore no seaweeds. The brackish-water hydroid Cordylophora caspia and small colonies of the encrusting bryozoan Electra crustulenta and a few Balanus crenatus characterise this biotope. More information required to validate this description.

Situation

Insufficient information to describe neighbouring biotopes.

Temporal variation

Unknown.

Characterising Species

Taxon Relative importance of taxon for defining this community (%) Typical abundance - SACFOR scale % of core records where taxon was recorded
Cordylophora caspia 98 Occasional 81-100 %
Balanus crenatus 1 Rare 41-60 %
Electra crustulenta 1 Frequent 41-60 %

Similar biotopes

Not applicable or unknown.

Biotope history

Classification Habitat code
96.7 SCR.HarCon in part

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