Description of biotope or habitat type
Mytilus edulis and Fabricia sabella in littoral mixed sediment
Habitat (physical) description
|Salinity||Full (30-35 ppt)|
|Wave exposure||Sheltered, Very sheltered, Extremely sheltered|
|Substratum||Mixed sediment, shell debris|
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.
Pebbles, gravel, sand and shell debris with mud in sheltered Firths with a strandline of fucoid algae. The fauna is characterised by juvenile mussels Mytilus edulis, often in very high numbers. The nemertean worm Lineus spp. may be abundant and oligochaetes are common. Polychaetes such as Pygospio elegans, Scoloplos armiger and Fabricia sabella may be present in high densities. Fabricia sabella is typically found amongst algal holdfasts and between cobbles on rocky shores. The bivalves Macoma balthica and Cerastoderma edule, typical of muddy sediments, characterise the community. The validity of this biotope is uncertain, as the only available data, from the Dornoch Firth and the Moray Firth, are poor. Its position within the classification, as a strandline community, is also very uncertain, but there is not enough information available for a better description or classification at this stage.
Occurs on sheltered shores of the Dornoch Firth and Moray Firth.
|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|
|Scoloplos armiger||6||Super abundant||72||61-80 %|
|Pygospio elegans||13||Abundant||100||81-100 %|
|Fabricia sabella||6||Common||89||81-100 %|
|Hydrobia ulvae||11||Abundant||67||61-80 %|
|Mytilus edulis||11||Abundant||100||81-100 %|
|Cerastoderma edule||2||Abundant||50||41-60 %|
|Macoma balthica||37||Abundant||37||81-100 %|