HELCOM RED LIST Biotope Expert Team
Baltic bottoms in the photic zone with at least 90 % coverage of sand has less than 20 % of mud/silt/clay fraction (<63 µm), and the proportion of sand (grain size 0.063–2 mm) exceeds 70% of the combined gravel and sand fraction. Annual algae cover at least 10 % of the seabed, while all other vegetation covers less than 10 %. Out of the annual algae, Vaucheria spp. constitutes at least 50 % of the biovolume.
range: <7 psu; Exposure range: sheltered; Depth range: photic zone down to
about 7 meters.
southern Baltic Sea to northern Bothnian Bay and eastern Gulf of Finland
2.5 Sandy bottoms
2.5.2 Sublittoral photic zone
22.214.171.124 Level bottoms dominated by macrophyte vegetation
A5 Sublittoral sediment
A5.5 Sublittoral macrophyte-dominated sediment
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