Formation of sapropel in the lakes of Belarus

Abstract

The role of natural factors in the formation of organic sapropel of different genesis was evaluated. The dynamics of trophic conditions and the composition of ancient biocenoses in the Sudobl Lake with outlet in the Minsk region were studied. It was found that the dystrophication of the water body, which began approximately 3500 years ago, facilitated a sharp decrease in the aromatic nucleus content of the humic acids of sapropels, as compared with the earlier stage of the transition of the lake from a highly eutrophic to a weakly eutrophic state.