Description of biotope or habitat type
Nephtys hombergii and Streblospio shrubsolii in littoral mud
Habitat (physical) description
|Salinity||Reduced (18-30ppt), Variable (18-35 ppt)|
|Wave exposure||Very sheltered, Extremely sheltered|
|Substratum||Mud with fine sand fraction|
|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 wet mud with a fine sand fraction, on the mid and lower shore of sheltered estuaries, usually with an anoxic layer present within the first 5 cm of the sediment. The infauna is relatively poor, dominated by the polychaetes Nephtys hombergii, Streblospio shrubsolii, and Aphelochaeta marioni. The oligochaete Tubificoides benedii is also characterising for this biotope, and Hediste diversicolor may be common.
NhomStr may occur on the same shores as the MEST biotopes, Hed.Cvol or Hed.Str. Higher up on the shore, and/or further towards the head of the estuary, Hed.Ol may occur, changing to Tben at the upper extreme of the 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|
|Nephtys hombergii||9||Common||108||61-80 %|
|Streblospio shrubsolii||23||Common||483||61-80 %|
|Aphelochaeta marioni||50||Abundant||2790||61-80 %|
|Tubificoides benedii||10||Common||1259||61-80 %|