Description of biotope or habitat type
Bathyporeia pilosa and Corophium arenarium in littoral muddy sand
Habitat (physical) description
|Salinity||Full (30-35 ppt), Variable (18-35 ppt)|
|Wave exposure||Moderately exposed, Sheltered, Very sheltered, Extremely sheltered|
|Substratum||Medium to very fine sand, muddy sand|
|Depth Band||Lower shore, Mid shore, Upper shore|
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.
- 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'
Point data based on records in the UK Marine Recorder Snapshot.
Wave-sheltered, mainly upper and mid shore flats of medium to fine sand, often muddy sand. The salinity, although predominantly recorded as variable, probably varies little from fully marine in these broad estuaries. The infauna is characterised by the amphipods Bathyporeia pilosa, Corophium arenarium and C. volutator, and the spire shell Hydrobia ulvae. Polychaetes and bivalves are limited in their abundance and variety, though the Baltic tellin Macoma balthica may occur. Tidal streams may be strong during spring tides, accounting for the presence of amphipods B. pilosa that are more commonly associated with open coast sandflats.
This biotope is typically found higher up the shore than sandflats with the cockle Cerastoderma edule (CerPo) in the large sandy estuaries of the west coast of England and Wales. In moderately exposed conditions, BatCare can occur on the mid shore below Tal and/or BarSa. In more sheltered conditions, BatCare may occur above NhomMacStr.
|Taxon||Relative importance of taxon for defining this community (%)||Typical abundance - SACFOR scale||Typical abundance - (count per m2)||% of core records where taxon was recorded|
|Bathyporeia pilosa||74||Abundant||2644||81-100 %|
|Corophium arenarium||5||Common||841||61-80 %|
|Corophium volutator||3||Common||1144||21-40 %|
|Hydrobia ulvae||13||Abundant||1591||61-80 %|