RED LIST Biotope Expert Team
Baltic aphotic 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). Sessile/semi-sessile epibenthic
polychaetes cover at least 10 %of the seabed and more than other perennial
attached erect groups.
Substrate is muddy sediment. Depth below approximately 20 m. Appears
in all energy exposure classes.
tube building polychaetes
Diversity, abundance and biomass of fauna.
Whole Baltic Sea
2.7 Muddy bottoms
A5 Sublittoral sediment
A5.3 Sublittoral mud
A5.37 Deep circalittoral mud
A5.378 Baltic muddy bottoms of the aphotic zone
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