EUNIS habitat classification 2017 > M - Marine benthic habitats > MB4 - infralittoral mixed sediment > MB43 - Baltic infralittoral mixed sediment > MB435 - Baltic infralittoral mixed sediment characterized by sparse epibenthic bivalves > MB4352 - Baltic infralittoral mixed sediment characterized by sparse Dreissena polymorpha

Baltic infralittoral mixed sediment characterized by sparse Dreissena polymorpha

Description (English)

Baltic bottoms in the photic zone with 10- 90 % coverage of hard (rock/boulders/stone) and 10-90 % soft substrata (e.g. muddy/coarse sediment/sand). Epibenthic bivalves cover at least 10%of the seabed and more than other perennial attached erect groups. Out of the epibenthic bivalves, Zebra mussel constitutes at least 50 % of the biomass.
Physical environment
Substrate is soft or crystalline rock, boulders or stones mixed with mobile substrates such as sand or coarse substrate. Depth is typically from 2 to 10 meters. Appears in sheltered to moderately exposed areas. Salinity must be less than 5 psu.
Characteristic species
Dreissena polymorpha
Geographic range
Estonian west coast and eastern Gulf of Finland

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type	code MB4352
Relation to	Annex I habitat types (EU Habitats Directive)

Legal status

Relation to other habitat types mentioned in legal instruments

Legal text	Annex	Name in legal text	Code in legal text	Habitat type relationship	More information
Council Directive 92/43/EEC of 21 May 1992 on the conservation of natural habitats and of wild fauna and flora - consolidated version 01/01/2007	Annex I: natural habitat types of community interest whose conservation requires the designation of special areas of conservation	Large shallow inlets and bays	1160	Overlap	http://ec.europa.eu/environm...rective/index_en.htm
Council Directive 92/43/EEC of 21 May 1992 on the conservation of natural habitats and of wild fauna and flora - consolidated version 01/01/2007	Annex I: natural habitat types of community interest whose conservation requires the designation of special areas of conservation	Reefs	1170	Overlap

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Dreissena polymorpha

Species scientific name	English common name	Species group
Dreissena polymorpha		Invertebrates

Other classifications

Classification	Code	Habitat type name	Relationship type
EUNIS Habitat Classification 2007 (revised descriptions 2012)	A5.411	Baltic level mixed sediment bottoms of the infralittoral photic zone with little or no macrophyte vegetation	narrower

For relation to plant communities (syntaxa), see Vegetation types

History

Classification	Code	Habitat type name	Relationship type
EUNIS Habitat Classification 200410	A5.411	Baltic level mixed sediment bottoms of the infralittoral photic zone with little or no macrophyte vegetation	same
EUNIS Habitat Classification 200308	A4.434	Baltic level mixed sediment bottoms of the infralittoral photic zone with little or no macrophyte vegetation	same
EUNIS Habitat Classification 200202	A4.434	Baltic level mixed sediment bottoms of the infralittoral photic zone with little or no macrophyte vegetation	same
EUNIS Habitat Classification 199910	A4.454	Baltic level mixed sediment bottoms of the infralittoral photic zone with little or no macrophyte vegetation	same

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