RED LIST Biotope Expert Team
photic 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 . Sessile/semi-sessile
epibenthic macrofauna is not present. Biomass of infaunal bivalves dominates
and is the highest in the group that includes infaunal bivalves/polychaetes/crustaceans.
is coarse sediment. Depth below approximately 30 m. Appears in high energy
abundance and biomass of fauna.
Whole Baltic Sea
HELCOM 1998: 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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