HELCOM RED LIST Biotope Expert Team
Baltic bottoms in the photic zone with at least 90 % coverage of shell gravel. Perennial attached algae cover at least 10 % of the seabed, and more than other perennial attached erect groups. Out of the perennial attached algae, kelp constitutes at least 50 % of the biovolume.
Salinity range: <11 psu; Exposure range: moderate to high; Depth range: photic zone
Saccharina latissima, Laminaria digitata, Laminaria hyperboria
Photic zone areas consisting of dead mollusc shells or shell fragments.
South-western Baltic Sea, the Sound
2.6 Shell gravel bottoms
2.6.2 Sublittoral photic zone
Shell gravel bottoms
habitat under threat and/or in decline in all areas of occurrence : The Southern Baltic Proper, The Gulf of Gdansk, Bay of Mecklenburg, Kiel Bay, Little Belt, Great Belt, The Sound, Kattegat
A5 Sublittoral sediment
A5.5 Sublittoral macrophyte-dominated sediment
A5.52 Kelp and seaweed communities on sublittoral sediment
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This biotope has been listed as Near Threatened (NT) in the HELCOM Red List of Baltic Sea biotopes and habitats.
See the Biotope Information Sheet of AA.E1C4