Pollution threats to the Gulf of Bothnia

Many of the problems coupled to large local discharges of contaminants to the Gulf of Bothnia are now decreasing, although the concentrations of pollutants in sediments and biota will remain high for a long time. The long-term development of the pollution situation in the Gulf of Bothnia will essentially be governed by conditions outside the area. Many contaminants are widely spread and may accumulate far from the sources, Therefore, differences in vulnerability will be crucial far where environmental effects occur, The ecosystems of the Gulf of Bothnia are particularly vulnerable because of almost oligotrophic conditions and a climate that may favor accumulation of persistent organic pollutants.