Baltic circalittoral mixed sediment dominated by hydroids (Hydrozoa)
Description (English)
Baltic circalittoral bottoms in the aphotic zone with at least 10- 90 % coverage of hard (rock/boulders/stone) and 10-90 % soft substrata (e.g. muddy/coarse sediment/sand). Epibenthic cnidarians cover at least 10 % of the seabed, and more than other perennial attached erect groups. Out of the epibenthic cnidarians, hydroids constitute 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 20 to 100 meters.
Characteristic species
Laomedea spp, Cordylophora caspia
Geographic range
Known from Russian waters
Source: EUNIS habitat classification
Quick facts
| EUNIS habitat type | code MC4331 |
|---|---|
| Relation to | Annex I habitat types (EU Habitats Directive) |
Legal status
Relation to other habitat types mentioned in legal instruments
Vegetation types
Relation to vegetation types (syntaxa)
Not availableSpecies mentioned in habitat description
Other classifications
| Classification | Code | Habitat type name | Relationship type |
|---|---|---|---|
| EUNIS Habitat Classification 2007 (revised descriptions 2012) | A5.44 | Circalittoral mixed sediments | narrower |
| European Red List of Habitats | BAL42 | Epifaunal communities on Baltic circalittoral rock and mixed substrata (predominantly hard) | narrower |
History
| Classification | Code | Habitat type name | Relationship type | Comment |
|---|---|---|---|---|
| EUNIS Habitat Classification 200410 | A5.44 | Circalittoral mixed sediments | same | |
| EUNIS Habitat Classification 200308 | A4.44 | Animal communities of circalittoral mixed sediments | wider | |
| EUNIS Habitat Classification 200202 | A4.44 | Animal communities of circalittoral mixed sediments | same | |
| EUNIS Habitat Classification 199910 | A4.49 | Animal communities of circalittoral mixed sediments | same |
