Hediste diversicolor and Streblospio shrubsolii in littoral sandy mud
Description (English)
Mud and sandy mud shores in sheltered marine inlets and estuaries subject to variable or reduced salinity. The biotope is typically found on the mid and lower shores and is often associated with shallow layers of cobbles and pebbles in the sediment in the upper and mid estuary. The sediment is anoxic close to the surface and remains water saturated during low tide. The infaunal polychaete community is dominated by dense Hediste diversicolor, as well as species with a limited salinity range tolerance such as Streblospio shrubsolii and Manayunkia aestuarina. Oligochaetes, including Heterochaeta costata and Tubificoides benedii are often abundant, and the amphipod Corophium volutator is often common.
Situation: This unit may occur on the same shores as A2.313, A2.312, NhomAph or A2.3222. Higher up on the shore, and/or further towards the head of the estuary, A2.3223 may occur, changing to Tben at the upper extreme of the estuary.
Temporal variation: Enteromorpha spp. or Ulva lactuca may form mats on the surface of the sediment during the summer months, particularly in areas of freshwater influence and/or where there is nutrient enrichment.
Source: EUNIS habitat classification
Quick facts
EUNIS habitat type | code A2.3221 |
---|---|
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 | |
Streblospio shrubsolii | Invertebrates |
Other classifications
Classification | Code | Habitat type name | Relationship type |
---|---|---|---|
Marine Habitat Classification Britain/Ireland 0405 | LS.LMu.UEst.Hed.Str | <I>Hediste diversicolor</I> and <I>Streblospio shrubsolii</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 | A2.3221 | Hediste diversicolor and Streblospio shrubsolii in littoral sandy mud | same |
EUNIS Habitat Classification 200308 | A2.372 | Hediste diversicolor and Streblospio shrubsolii in sandy mud or soft mud shores | overlap |
EUNIS Habitat Classification 200202 | A2.372 | Hediste diversicolor and Streblospio shrubsolii in sandy mud or soft mud shores | overlap |
EUNIS Habitat Classification 199910 | A2.322 | Hediste diversicolor and Streblospio shrubsolii in sandy mud or soft mud shores | overlap |
MNCR BioMar 97.06 (Britain & Ireland) | LMU.Mu.HedStr | Hediste diversicolor and Streblospio shrubsolii in sandy mud or soft mud shores | overlap |