HELCOM RED LIST Biotope Expert Team
Baltic photic zone 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 . Biomass of infaunal bivalves dominates and is highest in the group that includes infaunal bivalves/polychaetes/crustaceans/echinoderms/insect larvae. Ophelia spp. and Travisia forbesi constitute ≥10 %of the infaunal macrocommunity biomass when disregarding the biomass of bivalves.
Ophelia spp, Tanaissus spp, Streptosyllis spp.us
abundance and biomass of fauna.
bight to Darss sill
2.4 Gravel bottoms
2.4.2 Sublittoral photic zone
220.127.116.11 Level bottoms with little or no macrophyte vegetation
Gravel bottoms with Ophelia species
habitat under threat and/or in decline in all areas of occurrence
Bay of Mecklenburg, Kiel Bay, Little Belt, Great Belt, The Sound, Kattegat
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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This biotope has been listed as Near Threatened (NT) in the HELCOM Red List of Baltic Sea biotopes and habitats.