Regularities of Primary Production Formation in River Ecosystems (the Basins of the Pripyat' and Teterev Rivers, Ukraine)

摘要

The formation of phytoplankton primary production in the rivers of the Pripyat' and Teterev basins differing in their morphometric characteristics, hydrochemical regime, and trophic status has been studied for the first time. The obtained results suggest that the tributaries of the Pripyat' and Teterev rivers significantly differ in the intensity of primary production, which is determined by phytoplankton biomass, by the total content of nitrogen and phosphorus in the water, and also by the influence of such abiotic factors as solar radiation and water temperature. Relationship was established between the intensity of photosynthesis and water transparency and dissolved oxygen content. At the same time, the intensity of photosynthesis depended inversely on water coloration. This fact suggests that the processes of production in watercourses of the Pripyat' and Teterev basins significantly influence environmental conditions, including light and gas regimes.