HELCOM RED LIST Biotope Expert Team
Baltic bottoms in the aphotic 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. No macro- epi- or infauna.
Salinity range: all; Exposure range: all; Depth
range: below photic zone ‑ more common in deeper areas.
Oligochaeta, Ostracoda, Nematoda, Copepoda
Sandy bottoms in the aphotic zone with less
than 20 % of mud/silt/clay fraction (<63 µm), and more than 70 % of
sand (grain size 0.063–2 mm ).No macro- epi- or infauna.
Whole Baltic Sea
Sand excavation, silting caused by
eutrophication, dredging spoil deposition etc.
2.5 Sandy bottoms
2.5.1 Aphotic zone
A5 Sublittoral sediment
A5.2 Sublittoral sand
A5.27 Deep circalittoral sand
A5.273 Baltic sandy bottoms of the aphotic zone
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