RED LIST Biotope Expert Team
vertical zone below which the amount of light is not sufficient for
range: All; Exposure range: Typically more exposed areas; Depth range: usually
deeper than 15 meters.
area deeper than Secchi depth multiplied by 2.5. Due to temporal variation of
water turbidity, the depth should represent a long-term growth season average. The
absence of foliose vegetation can also be used with other indicators.
abundance and diversity (“high” is dependent on Sea area) of macrozoobenthos
indicates good environmental status.
Whole Baltic Sea
depletion caused by increased organic sedimentation. Locally dredging and
dumping of dredge spoil, poisonous effluents, bottom trawling.
2. Benthic marine biotopes
A Marine habitats
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HELCOM HUB: Technical Report on the HELCOM Underwater Biotope and habitat classification BSEP 139