Effect of geographical factors on the biological productivity of Lake ecosystems: Modeling and forecast

The correlation between the lake ecosystem productivity and geographical and climatic factors and the production of terrestrial vegetation in the catchment area has been described in the form of a dynamic mass-balance model using Lake Krivoe (North Karelia) as an example. A model algorithm has been presented. It is concluded that, with natural year-to-year fluctuations of the biogenic load and the absence of anthropogenic impacts, Lake Krivoe has been preserving the status of an oligotrophic water body for more than 40 years (1968–2013).