THE EVOLUTIONARY DEVELOPMENT AND CURRENT STATE OF LAKE NERO ACCORDING TO SAPROPEL ANALYSIS
Abstract and keywords
Abstract (English):
The paper presents the characteristics of sapropel based on the results of analysis of samples collected at 21 stations in Lake Nero. Its current state is assessed based on hydrophysical and hydrochemical parameters. A layer-by-layer (0–10, 30–40 and 60–70 cm) granulometric composition of stratigraphic cores made it possible to compare the evolutionary development of the lake corresponding to the periods 100, 300–400 and 600–800 years ago. It is found that natural hydrodynamic processes (wind-driven waves and wind-driven currents) cause erosion and mixing of the surface (0–10 cm) polluted sapropel layer with clean underlying horizons and carry pollutants absorbed on suspended particles outside the lake. The approach used made it possible to identify the ways of a shallow lake ecosystem formation and outline promising directions

Keywords:
lake ecosystem, bottom sediments – sapropel, hydrophysical and hydrochemical parameters, retrospective assessment
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