EUNIS habitat classification 2017 > M - Marine benthic habitats > MA5 - Littoral sand > MA52 - Atlantic littoral sand > MA525 - Polychaete/bivalve-dominated Atlantic littoral muddy sand

Polychaete/bivalve-dominated Atlantic littoral muddy sand

Description (English)

Muddy sand or fine sand, often occurring as extensive intertidal flats on open coasts and in marine inlets. The sediment generally remains water-saturated during low water. The habitat may be subject to variable salinity conditions in marine inlets. An anoxic layer may be present below 5 cm of the sediment surface, sometimes seen in the worm casts on the surface. The infauna consists of a diverse range of amphipods, polychaetes, bivalves and gastropods.
Situation: Muddy sand communities are found predominantly on the mid and lower shore, though they may span the entire intertidal. Fine sand or mobile sand communities may be present on the upper shore with muddy sand communities present lower down. In sheltered mid estuarine conditions, muddy sand communities may be present on the upper part of the shore with mid estuarine muddy shore communities (MA6-22) lower down.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code MA525
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

Not available

Other classifications

History

Classification Code Habitat type name Relationship type Comment
EUNIS Habitat Classification 200410 A2.24 Polychaete/bivalve-dominated muddy sand shores same
EUNIS Habitat Classification 200308 A2.25 Polychaete/bivalve-dominated muddy sand shores same
EUNIS Habitat Classification 200202 A2.25 Muddy sand shores same
EUNIS Habitat Classification 199910 A2.22 Muddy sand shores same
EUNIS Habitat Classification 199811 A2.21 Muddy sand shores with communities of molluscs same
EUNIS Habitat Classification 199712 A2.21 Muddy sand shores with communities of molluscs same
MNCR BioMar 97.06 (Britain & Ireland) LMS.MS Muddy sand shores same
MNCR BioMar 96.7 (Britain & Ireland) LMS.AreBv   narrower
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