HELCOM 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 . Sessile/semi-sessile epibenthic bivalves cover at least 10 % of the seabed.
Substrate is coarse sediment. Depth below approximately 30 m. Appears in high energy exposure areas.
Diversity, abundance and biomass of fauna.
Whole Baltic Sea
HELCOM 1998: 2.4Gravel bottoms
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 http://eunis.eea.europa.eu/habitats/2619
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