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Marine Habitat Classification

Description of biotope or habitat type

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   Angiosperm communities in reduced salinity

Physical habitat description

Salinity Reduced (18-30ppt), Variable (18-35 ppt), Low (<18ppt)
Wave exposure Extremely sheltered
Tidal streams Very weak (negligible)
Substratum Sandy mud with some pebbles and boulders
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 SS.SMp.Ang Angiosperm communities in reduced salinity

  • 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.


Lagoon communities, subject to reduced or low salinity conditions, dominated by angiosperms, including Potamogeton pectinatus beds and fringing habitats with reeds Phragmites australis.


No situation data available.

Temporal variation

No temporal data available.

Characterising species

Taxon Relative importance of taxon for defining this community (%) Typical abundance - SACFOR scale % of core records where taxon was recorded
Potamogeton pectinatus 8 Common 21-40 %
Mysidae 25 Frequent 41-60 %
Potamopyrgus antipodarum 23 Frequent 41-60 %
Mytilus edulis 4 Occasional 21-40 %
Enteromorpha intestinalis 2 Frequent 1-20 %
Cladophora liniformis 4 Frequent 21-40 %
Filamentous green algae 2 Occasional 1-20 %
Chara aspera 3 Frequent 1-20 %
Potamogeton 26 Frequent 61-80 %

Similar biotopes or habitat types

Not applicable or unknown.

Classification history of this biotope or habitat type

Classification version Code
97.06 IMU.Ang

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