HELCOM RED LIST Biotope Expert Team
Baltic photic zone bottoms with at least 90 % coverage of muddy sediment. The sediment must contain at least 20 % of mud, silt or clay (grain size less than 63 µm).Biomass of infaunal crustaceans dominates and is highest in the group that includes infaunal bivalves/polychaetes/crustaceans/echinoderms/insect larvae. Out of the infaunal crustaceans Monoporeia affinis constitutes at least 50% of the biomass.
is muddy sediment. Depth is typically from approximately 20 to 100 meters.
Appears in all wave exposure classes. Salinity below 10.
Monoporeia affinis, Saduria entomon
abundance and biomass of fauna. Number of healthy eggs in pregnant females.
Eutrophication, chemical pollution
2.7 Muddy bottoms
2.7.2 Sublittoral photic zone
220.127.116.11 With little or no macrophyte vegetation
A5 Sublittoral sediment
A5.3 Sublittoral mud
A5.31 Sublittoral mud in low or reduced salinity
A5.311 Baltic brackish water sublittoral muddy biocenoses influenced by
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