HELCOM RED LIST Biotope Expert Team
Baltic bottoms in the photic zone with at least 90 % coverage of sand.
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.
Salinity range: all; Exposure range: all; Depth range: photic zone
Phanerogams, charales, mobile epifauna, infauna
Photic zone areas with pure sand, often characterized by ripple marks.
Sediment must contain less than 20 % of mud/silt/clay fraction (<63
µm), and at least 70 % of grain size 63 µm–2 mm.
Soft sediment covering the sand will decrease the quality.
Silting caused by eutrophication, dredging spoil deposition etc.
2.5 Sandy bottoms
2.5.2 Sublittoral photic zone
A5 Sublittoral sediment
A5.2 Sublittoral sand
A5.21 Sublittoral sand in low or reduced salinity
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