RED LIST Biotope Expert Team
bottoms in the photic zone 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 . Coverage of macroscopic vegetation or
sessile macroscopic epifauna is 0><10 %.
range: all; Exposure range: moderate; Depth range: photic zone
Mytilus spp., Macoma baltica, Bathyporeia pilosa, Hediste diversicolor
zone areas with coarse sediment such as gravel. Sediment must contain less than
20 % of silt, clay or mud, and at least 30 % of grain size
2–63 mm. Coverage of macroscopic vegetation or sessile macroscopic
epifauna is 0><10 %.
Whole Baltic Sea
caused by eutrophication, dredging spoil deposition etc.
2.4 Gravel bottoms
2.4.2 Sublittoral photic zone
18.104.22.168 Level bottoms with little or no macrophyte vegetation
A5 Sublittoral sediment
A5.1 Sublittoral coarse sediment
A5.11 Infralittoral coarse sediment in low or reduced salinity
A5.111 : Baltic level gravel bottoms of the infralittoral photic zone
with little or no macrophyte vegetation
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