Phytoplankton Production and Decomposition Characteristics in Water Bodies Differing in the Degree of Their Contamination by Inorganic Compounds of Nitrogen and Phosphorus

Relationship between the processes of photosynthesis and organic matter decomposition was assessed in water bodies of the Aleksandriya Dendrological Park (the town of Belaya Tserkov, Ukraine), many of which are subjected to anthropogenic load. It has been shown that the range of fluctuations in production characteristics of phytoplankton of the studied ponds was determined mainly by different content of inorganic compounds of nitrogen and phosphorus in the water. A predominance of decomposition (R) overproduction (A), and also an approximation of A/R ratio to 1, registered in many studied ponds are indicative of a high intensity of the process of self-purification. A predominance of production over decomposition observed in the ponds of the Eastern ravine is indicative of the decrease in the intensity of self-purification potential.