Dubrovskyi Y. Bioproduction of riverbed ponds of the Forest-Steppe Zone of Ukraine and their nature protection value

The thesis is devoted to the assessment of bioproductive capabilities of ecosystems of multi-purpose channel ponds, analysis of their impact on the quality of water masses of associated watercourses and elucidation of their role in the preservation of local biodiversity. The data on the values of primary production and destruction in the plankton of multi-purpose ponds allow to differentiate applied fish-breeding technologies depending on the trophic category of these water bodies. The possibilities of increasing fish productivity in the studied ponds are revealed. Express methods for forecasting natural fish productivity of forest-steppe ponds and determining their taxonomic richness are developed. The impact of instream ponds on the self-purification capacity of small watercourses has been analyzed. The role of quasi-natural ecosystems, as specific components of the biosphere in the preservation of local and regional biodiversity, is exemplified by the surveyed pond and their surroundings.