Hediste diversicolor, Macoma balthica and Scrobicularia plana in littoral sandy mud
Description (English)
Mainly mid shore mud or sandy mud subject to variable salinity on sheltered estuarine shores. Typically, the sediment is wet in appearance and has an anoxic layer below 1 cm depth. The surface of the mud has the distinctive 'crow's foot' pattern formed by the peppery furrow shell Scrobicularia plana. The infauna is additionally characterised by a range of polychaete and bivalve species, including the ragworm Hediste diversicolor, Pygospio elegans, Streblospio shrubsolii, Tharyx killariensis and the baltic tellin Macoma balthica. Oligochaetes, most notably Tubificoides benedii, and the spire shell Hydrobia ulvae may be abundant. Other species that sometimes occur in this biotope are the cockle Cerastoderma edule, the sand gaper Mya arenaria and the polychaetes Eteone longa and Nephtys hombergii.
Situation: This unit may occur on the same shores as units A2.311, A2.312, NhomAph, A2.3221 and A2.3222. Higher up on the shore, and/or further towards the head of the estuary, A2.3223 may occur, changing to A2.323 at the upper extreme of the estuary.
Temporal variation: Enteromorpha spp. and Ulva lactuca may form mats on the surface of the mud during the summer months, particularly in areas of nutrient enrichment.
Source: EUNIS habitat classification
Quick facts
EUNIS habitat type | code A2.313 |
---|---|
Bern Convention | Included in a Resolution 4 habitat type at a higher level (A2.3) |
Vegetation types
Relation to vegetation types (syntaxa)
Not availableSpecies mentioned in habitat description
Species scientific name | English common name | Species group |
---|---|---|
Ulva lactuca | Algae | |
Cerastoderma edule | Invertebrates | |
Macoma balthica | Invertebrates | |
Mya arenaria | Invertebrates | |
Nephtys hombergii | Invertebrates | |
Scrobicularia plana | Invertebrates | |
Streblospio shrubsolii | Invertebrates |
Other classifications
Classification | Code | Habitat type name | Relationship type |
---|---|---|---|
Marine Habitat Classification Britain/Ireland 0405 | LS.LMu.MEst.HedMacScr | <I>Hediste diversicolor</I>, <I>Macoma balthica</I> and <I>Scrobicularia plana</I> in littoral sandy mud | source |
CORINE Land Cover | 4.2.3. | Intertidal flats | n/a |
History
Classification | Code | Habitat type name | Relationship type |
---|---|---|---|
EUNIS Habitat Classification 200410 | A2.313 | Hediste diversicolor, Macoma balthica and Scrobicularia plana in littoral sandy mud | same |
EUNIS Habitat Classification 200308 | A2.371 | Hediste diversicolor, Macoma balthica and Scrobicularia plana in littoral sandy mud shores | same |
EUNIS Habitat Classification 200308 | A2.361 | Hediste diversicolor and Macoma balthica in sandy mud shores | overlap |
EUNIS Habitat Classification 200202 | A2.371 | Hediste diversicolor and Scrobicularia plana in reduced salinity mud shores | same |
EUNIS Habitat Classification 199910 | A2.321 | Hediste diversicolor and Scrobicularia plana in reduced salinity mud shores | same |
MNCR BioMar 97.06 (Britain & Ireland) | LMU.Mu.HedScr | Hediste diversicolor and Scrobicularia plana in reduced salinity mud shores | same |