EUNIS habitat classification 2012 amended 2019 > A - Marine habitats > A2 - Littoral sediment > A2.2 - Littoral sand and muddy sand > A2.24 - Polychaete/bivalve-dominated muddy sand shores > A2.243 - Hediste diversicolor, Macoma balthica and Eteone longa in littoral muddy sand

Hediste diversicolor, Macoma balthica and Eteone longa in littoral muddy sand

English name: Hediste diversicolor, Macoma balthica and Eteone longa in littoral muddy sand

Description (English)

Fine to very fine muddy sand on the mid shore at the lower extreme of estuaries, and in moderately exposed and sheltered bays and marine inlets, sometimes subject to variable salinity. The infauna is characterised by the polychaetes Eteone longa, Hediste diversicolor (ragworm) and Pygospio elegans, oligochaetes (mostly Tubificoides benedii and T. pseudogaster), the crustaceans Corophium volutator and Crangon crangon, the spire shell Hydrobia ulvae and the baltic tellin Macoma balthica. The cockle Cerastoderma edule may be abundant, and the sand gaper Mya arenaria may be superabundant, though these species are not always present, or may be missed in core samples due to their large size. The polychaetes Arenicola marina, Polydora cornuta and Capitella capitata, the shrimp Crangon crangon, and the Mussel Mytilus edulis are sometimes present.
Situation: This unit can occur on the mid shore of sheltered, lower estuaries, with the A2.31 communities in muddier sediments on the lower shore. Under moderately exposed conditions in lower estuaries and towards open coasts, it may occur alongside other muddy sand units such as A2.242 or A2.244.
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 A2.243
Bern Convention Included in a Resolution 4 habitat type at a higher level (A2.2)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Algae Ulva lactuca
Invertebrates Arenicola marina
Invertebrates Capitella capitata
Invertebrates Cerastoderma edule
Invertebrates Corophium volutator
Invertebrates Crangon crangon
Invertebrates Eteone longa
Invertebrates Hydrobia ulvae
Invertebrates Macoma balthica
Invertebrates Mya arenaria
Invertebrates Mytilus edulis
Invertebrates Polydora cornuta
Invertebrates Pygospio elegans
Invertebrates Tubificoides benedii
Species scientific name English common name Species group
Ulva lactuca Algae
Arenicola marina Invertebrates
Capitella capitata Invertebrates
Cerastoderma edule Invertebrates
Corophium volutator Invertebrates
Crangon crangon Invertebrates
Eteone longa Invertebrates
Hydrobia ulvae Invertebrates
Macoma balthica Invertebrates
Mya arenaria Invertebrates
Mytilus edulis Invertebrates
Polydora cornuta Invertebrates
Pygospio elegans Invertebrates
Tubificoides benedii Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 LS.LSa.MuSa.HedMacEte <I>Hediste diversicolor</I>, <I>Macoma balthica</I> and <I>Eteone longa</I> in littoral muddy sand 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 A2.243 Hediste diversicolor, Macoma balthica and Eteone longa in littoral muddy sand same
EUNIS Habitat Classification 200308 A2.3613 Hediste diversicolor, Macoma balthica and Mya arenaria in sandy mud shores overlap
EUNIS Habitat Classification 200308 A2.3611 Hediste diversicolor, Macoma balthica and Arenicola marina in muddy sand or sandy mud shores overlap
EUNIS Habitat Classification 200308 A2.253 Macoma balthica and Arenicola marina in muddy sand shores overlap
EUNIS Habitat Classification 200202 A2.253 Macoma balthica and Arenicola marina in muddy sand shores overlap
EUNIS Habitat Classification 200202 A2.3613 Hediste diversicolor, Macoma balthica and Mya arenaria in sandy mud shores overlap
EUNIS Habitat Classification 200202 A2.3611 Hediste diversicolor, Macoma balthica and Arenicola marina in muddy sand or sandy mud shores overlap
EUNIS Habitat Classification 199910 A2.223 Macoma balthica and Arenicola marina in muddy sand shores overlap
EUNIS Habitat Classification 199910 A2.3113 Hediste diversicolor, Macoma balthica and Mya arenaria in sandy mud shores overlap
EUNIS Habitat Classification 199910 A2.3111 Hediste diversicolor, Macoma balthica and Arenicola marina in muddy sand or sandy mud shores overlap
MNCR BioMar 97.06 (Britain & Ireland) LMU.SMu.HedMac.Are Hediste diversicolor, Macoma balthica and Arenicola marina in muddy sand or sandy mud shores overlap
MNCR BioMar 97.06 (Britain & Ireland) LMS.MS.MacAre Macoma balthica and Arenicola marina in muddy sand shores overlap
MNCR BioMar 97.06 (Britain & Ireland) LMU.SMu.HedMac.Mare Hediste diversicolor, Macoma balthica and Mya arenaria in sandy mud shores overlap
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