EUNIS habitat classification 2017 > M - Marine benthic habitats > MC1 - Circalittoral rock > MC13 - Baltic ciralittoral rock > MC132 - Baltic ciralittoral rock and boulders characterized by epibenthic chordates > MC1321 - Baltic ciralittoral rock and boulders dominated by sea squirts (Ascidiacea)

Baltic ciralittoral rock and boulders dominated by sea squirts (Ascidiacea)

Description (English)

Baltic circalittoral bottoms in the aphotic zonewith at least 90 % coverage of rock, boulders or stones of more than 63 mm in diameter. Epibenthic chordates cover at least 10%of the seabed and more than other perennial attached erect groups. Out of the epibenthic chordates, sea squirts constitute at least 50 % of the biomass.
Physical environment
Substrate is rock and/or boulders.
Characteristic species
Ascidiacea: Dendrodoa grossularia, Modiolus spp.
Geographic range
Kattegat and Belt Sea

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type	code MC1321
Relation to	Resolution 4 habitat type (used for designation of Emerald sites)

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
Convention on the conservation of European wildlife and natural habitats	Revised Annex I of Resolution 4 (1996) of the Bern Convention on endangered natural habitats types using the EUNIS habitat classification (year of revision 2010)	Large shallow inlets and bays	1160	Overlap	https://wcd.coe.int/ViewDoc....ckColorLogged=FDC864 Resolution No. 4 (1996) of the Bern Convention lists endangered natural habitats requiring specific conservation measures [and the designation of Areas of Special Conservation Interest (ASCIs) forming the Emerald network]
Convention on the conservation of European wildlife and natural habitats	Revised Annex I of Resolution 4 (1996) of the Bern Convention on endangered natural habitats types using the EUNIS habitat classification (year of revision 2010)	Reefs	1170	Narrower	https://wcd.coe.int/ViewDoc....ckColorLogged=FDC864 Resolution No. 4 (1996) of the Bern Convention lists endangered natural habitats requiring specific conservation measures [and the designation of Areas of Special Conservation Interest (ASCIs) forming the Emerald network]

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Dendrodoa grossularia

Species scientific name	English common name	Species group
Dendrodoa grossularia		Invertebrates

Other classifications

Classification	Code	Habitat type name	Relationship type
EUNIS Habitat Classification 2007 (revised descriptions 2012)	A4.4	Baltic exposed circalittoral rock	overlap
EUNIS Habitat Classification 2007 (revised descriptions 2012)	A4.6	Baltic sheltered circalittoral rock	overlap
EUNIS Habitat Classification 2007 (revised descriptions 2012)	A4.5	Baltic moderately exposed circalittoral rock	overlap
European Red List of Habitats	BAL42	Epifaunal communities on Baltic circalittoral rock and mixed substrata (predominantly hard)	narrower

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

History

Classification	Code	Habitat type name	Relationship type
EUNIS Habitat Classification 200410	A4.4	Baltic exposed circalittoral rock	same
EUNIS Habitat Classification 200410	A4.6	Baltic sheltered circalittoral rock	same
EUNIS Habitat Classification 200410	A4.5	Baltic moderately exposed circalittoral rock	same
EUNIS Habitat Classification 200308	A3.913	Baltic stony bottoms of the aphotic zone	overlap
EUNIS Habitat Classification 200308	A3.916	Baltic peat bottoms of the sublittoral zone	overlap
EUNIS Habitat Classification 200308	A3.912	Baltic solid bedrock of the aphotic zone	overlap
EUNIS Habitat Classification 200308	A3.914	Baltic hard clay bottoms of the aphotic zone	overlap
EUNIS Habitat Classification 200308	A3.915	Baltic Mytilus edulis beds in the aphotic zone of the Baltic	overlap
EUNIS Habitat Classification 200308	A3.911	Baltic soft rock bottoms of the aphotic zone	overlap
EUNIS Habitat Classification 200202	A3.911	Baltic soft rock bottoms of the aphotic zone	same
EUNIS Habitat Classification 200202	A3.913	Baltic stony bottoms of the aphotic zone	same
EUNIS Habitat Classification 200202	A3.916	Baltic peat bottoms of the sublittoral zone	same
EUNIS Habitat Classification 200202	A3.912	Baltic solid bedrock of the aphotic zone	same
EUNIS Habitat Classification 200202	A3.914	Baltic hard clay bottoms of the aphotic zone	same
EUNIS Habitat Classification 200202	A3.915	Baltic Mytilus edulis beds in the aphotic zone of the Baltic	same
EUNIS Habitat Classification 199910	A3.95	Baltic hard clay bottoms of the aphotic zone	same
EUNIS Habitat Classification 199910	A3.96	Baltic Mytilus edulis beds in the aphotic zone of the Baltic	same
EUNIS Habitat Classification 199910	A3.92	Baltic soft rock bottoms of the aphotic zone	same
EUNIS Habitat Classification 199910	A3.94	Baltic stony bottoms of the aphotic zone	same
EUNIS Habitat Classification 199910	A3.97	Baltic peat bottoms of the sublittoral zone	same
EUNIS Habitat Classification 199910	A3.93	Baltic solid bedrock of the aphotic zone	same

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