HELCOM RED LIST Biotope Expert Team
Baltic aphotic 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 is typically
from 20 to 100 meters.
Diversity, abundance and biomass of fauna.
Whole Baltic Sea
2.8 Mixed sediment bottoms
2.8.1 Aphotic zone
A5 Sublittoral sediment
A5.4 : Sublittoral mixed sediments
A5.41 : Sublittoral mixed sediment in low or reduced salinity
A5.412 : Baltic mixed sediment bottoms of the aphotic zone
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