EUNIS habitat classification 2012 > A - Marine habitats > A5 - Sublittoral sediment > A5.4 - Sublittoral mixed sediments

Sublittoral mixed sediments

English name: Sublittoral mixed sediments

Description (English)

Sublittoral mixed (heterogeneous) sediments found from the extreme low water mark to deep offshore circalittoral habitats. These habitats incorporate a range of sediments including heterogeneous muddy gravelly sands and also mosaics of cobbles and pebbles embedded in or lying upon sand, gravel or mud. There is a degree of confusion with regard nomenclature within this complex as many habitats could be defined as containing mixed sediments, in part depending on the scale of the survey and the sampling method employed. The BGS trigon can be used to define truly mixed or heterogeneous sites with surficial sediments which are a mixture of mud, gravel and sand. However, another 'form' of mixed sediment includes mosaic habitats such as superficial waves or ribbons of sand on a gravel bed or areas of lag deposits with cobbles/pebbles embedded in sand or mud and these are less well defined and may overlap into other habitat or biological subtypes. These habitats may support a wide range of infauna and epibiota including polychaetes, bivalves, echinoderms, anemones, hydroids and Bryozoa. Mixed sediments with biogenic reefs or macrophyte dominated communities are classified separately in A5.6 and A5.5 respectively.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A5.4
Bern Convention Included in a Resolution 4 habitat type at a higher level (A5)
Relation to Annex I habitat types (EU Habitats Directive)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Not available

Other classifications

Classification Code Habitat type name Relationship type
CORINE Land Cover 5.2.3. Sea and ocean n/a
Marine Habitat Classification Britain/Ireland 0405 SS.SMx Sublittoral mixed sediment same
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 200410 A5.4 Sublittoral mixed sediments same
EUNIS Habitat Classification 200308 A4.4 Sublittoral mixed sediment same
EUNIS Habitat Classification 200308 A4.75 Animal communities of deep circalittoral mixed sediment bottoms narrower
EUNIS Habitat Classification 200308 A4.76 Communities of shelf-edge detritic bottom narrower
EUNIS Habitat Classification 200202 A4.76 Communities of shelf-edge detritic bottom narrower
EUNIS Habitat Classification 200202 A4.4 Sublittoral combination sediments narrower
EUNIS Habitat Classification 200202 A4.75 Animal communities of deep circalittoral mixed sediment bottoms narrower
EUNIS Habitat Classification 199910 A4.72 Biocenosis of shelf-edge detritic bottom narrower
EUNIS Habitat Classification 199910 A4.4 Sublittoral mixed sediments narrower
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