The situation in the European part of Russia regarding cyanobacteria and cyanotoxins
Cyanobacterial blooms have been also noted in water bodies of the European part of Russia (from the Barents Euro-Arctic Region to the Central part). Since the mid-20th century, the dominant species shifted from diatoms to blue-green algae as a result of anthropogenic pressures and increasing eutrophication. Bloom-forming species are potentially toxin-producing ones: Microcystis spp, Aphanizomenon flos-aquae, Planktothrix agardhii, Anabaena spp. Every summer period high concentrations of microcystins were detected. Concentrations of MC-LR in some regions exceed the provisional value for recreation waters several times in a season.