Hediste diversicolor and Limecola balthica in littoral gravelly mud

Description (English)

Sheltered gravelly mud shores, subject to reduced salinity. The infaunal community consists of the ragworm Hediste diversicolor, as well as the spire shell Hydrobia ulvae and the baltic tellin Limecola balthica (Macoma balthica). The presence of the gravel in the sediment is unlikely to have a large influence on the infaunal composition, which is driven mainly by the estuarine sandy mud conditions. Coarse material on the sediment surface may however enrich the biota with additional epifaunal species such as barnacles and algae. Given the low sample numbers for this biotope, more records are needed to confirm the characterising species list.
Situation: It is probable that there are broad transition areas between this biotope, and the corresponding muddy sediment biotope, unit MA6-224. The boundaries may be very indistinct, with MA4-2321 present in patches of gravelly mud on areas of mudflat, where the main biotope is MA6-224. This biotope has been found alongside its mud equivalent in the Stour estuary.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code MA42321
Relation to Resolution 4 habitat type (used for designation of Emerald sites)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Hydrobia ulvae
Invertebrates Macoma balthica
Species scientific name English common name Species group
Hydrobia ulvae Invertebrates
Macoma balthica Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 2007 (revised descriptions 2012) A2.4111 Hediste diversicolor and Macoma balthica in littoral gravelly mud same
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type Comment
EUNIS Habitat Classification 200410 A2.4111 Hediste diversicolor and Macoma balthica in littoral gravelly mud same
EUNIS Habitat Classification 200308 A2.415 Hediste diversicolor and Macoma balthica in poorly sorted mixed sediment shores same
EUNIS Habitat Classification 200202 A2.415 Hediste diversicolor and Macoma balthica in poorly sorted mixed sediment shores overlap
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