Conditions of the Formation of Primary Production in Volga Reservoirs

The conditions of formation of planktonic primary production in Volga reservoirs are considered. It is shown that photosynthetic production is determined by the quantitative development and state of producer organisms, light and temperature conditions, and the supply of algae cells with energy resources. The features of the spatial distribution and seasonal dynamics of phytoplankton in the Volga reservoirs and the main factors of photosynthetic and respiratory activity (nutrients, underwater light regime, and temperature conditions) are considered.