RED LIST Biotope Expert Team
Balticaphotic bottoms with at least 90 % coverage
of coarse sediment. Coarse sediment has less than 20 % of mud/silt/clay
fraction (<63 µm), and the proportion of gravel and pebbles (grain size 2–63
mm) exceeds 30% of the combined gravel and sand fraction . No perennial
attached erect group has ≥ 10 % coverage.
Substrate is coarse sediment. Depth below approximately 30 m.
Appears in high energy exposure areas.
Whole Baltic Sea
2.4 Gravel bottoms
2.4.1 Aphotic zone
A5 Sublittoral sediment
A5.1 Sublittoral coarse sediment
A5.11 Infralittoral coarse sediment in low or reduced salinity
A5.114 : Baltic gravel bottoms of the aphotic zone
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