HELCOM RED LIST Biotope Expert Team
Baltic photic bottoms with 10- 90 % coverage of hard (rock/boulders/stone) and 10-90 % soft substrata (e.g. muddy/coarse sediment/sand). Sessile/semi-sessile epibenthic bivalves cover at least 10 % of the seabed and more than other perennial attached erect groups.
Substrate is soft or crystalline rock, boulders or stones mixed with mobile substrates such as sand or coarse substrate Depth range: photic zone
Mytilus spp., Dreissena polymorpha
Diversity, abundance and biomass of fauna.
Whole Baltic Sea
2.8 Mixed sediment bottoms
2.8.2 Sublittoral photic zone
188.8.131.52 With little or no macrophyte vegetation
A5 Sublittoral sediment
A5.4 : Sublittoral mixed sediments
A5.41 : Sublittoral mixed sediment in low or reduced salinity
A5.411 : Baltic level mixed sediment bottoms of the infralittoral photic zone with little or no macrophyte vegetation
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