Hediste diversicolor in littoral mud

English name: Hediste diversicolor in littoral 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 in the upper and mid estuary. If present on the upper shore, the sediment may become firm and compacted as water drains out, though usually the biotope occurs lower on the shore and the sediment remains water saturated during low tide. An anoxic layer occurs within the upper 5 cm of the sediment. The infauna is dominated by abundant or superabundant ragworms Hediste diversicolor. Other species that occur in a significant number of samples include oligochaetes such as Heterochaeta costata and Tubificoides spp., polychaetes such as Streblospio shrubsolii and Manayunkia aestuarina, the mud shrimp Corophium volutator, and the spire shell Hydrobia ulvae.
Situation: This unit may occur on the same shores as units A2.312, A2.313r, or NhomAph. Higher up on the shore, and/or further towards the upper extreme of the estuary, A2.323 may occur.
Temporal variation: Enteromorpha spp. and 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 A2.322
Bern Convention Included in a Resolution 4 habitat type at a higher level (A2.3)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Corophium volutator
Invertebrates Heterochaeta costata
Invertebrates Hydrobia ulvae
Invertebrates Manayunkia aestuarina
Invertebrates Streblospio shrubsolii
Algae Ulva lactuca
Species scientific name English common name Species group
Corophium volutator Invertebrates
Heterochaeta costata Invertebrates
Hydrobia ulvae Invertebrates
Manayunkia aestuarina Invertebrates
Streblospio shrubsolii Invertebrates
Ulva lactuca Algae

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 LS.LMu.UEst.Hed <I>Hediste diversicolor</I> in littoral mud source
CORINE Land Cover 4.2.3. Intertidal flats n/a
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 200410 A2.322 Hediste diversicolor in littoral mud same
EUNIS Habitat Classification 200308 A2.372 Hediste diversicolor and Streblospio shrubsolii in sandy mud or soft mud shores overlap
EUNIS Habitat Classification 200308 A2.373 Hediste diversicolor and oligochaetes in low salinity 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 200202 A2.373 Hediste diversicolor and oligochaetes in low salinity mud shores overlap
EUNIS Habitat Classification 199910 A2.323 Hediste diversicolor and oligochaetes in low salinity 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.HedOl Hediste diversicolor and oligochaetes in low salinity 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
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