Description of biotope or habitat type
Nephtys hombergii, Macoma balthica and Streblospio shrubsolii in littoral sandy mud
Habitat (physical) description
|Salinity||Variable (18-35 ppt)|
|Wave exposure||Sheltered, Very sheltered, Extremely sheltered|
|Depth Band||Lower shore, Mid 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.
Soft mud with a fine sand fraction, in variable salinity conditions, typically close to the head of estuaries. The infauna is dominated by the polychaete worm Streblospio shrubsolii, the polychaete Nephtys hombergii, oligochaetes of the genus Tubificoides, and the Baltic tellin Macoma balthica. The ragworm Hediste diversicolor and the spire shell Hydrobia ulvae are often common or abundant.
NhomMacStr occurs in mid estuary conditions, usually on the low shore. Tben and Hed.Ol may occur higher up the shore, as well as further towards the upper estuary.
Enteromorpha spp. and Ulva lactuca may form mats on the surface of the mud during the summer months, particularly in areas of nutrient enrichment.
|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|
|Hediste diversicolor||1||Common||124||41-60 %|
|Nephtys hombergii||6||Abundant||133||61-80 %|
|Streblospio shrubsolii||13||Common||593||81-100 %|
|Tubificoides benedii||10||Common||999||81-100 %|
|Hydrobia ulvae||43||Abundant||5093||81-100 %|
|Macoma balthica||12||Common||373||81-100 %|