Abstract:

Aim of the research – to reveal features of the seasonal dynamics of the biogens content in surface waters of Vidsichne water intake of the river Teteriv in 2012-2014 years and explanation of their correlations with the number of plankton water plants. Methods. In water samples, taken from water intake (1 dm3), there was determined the content of ammonia, nitrites, nitrates and polyphosphates by photometric methods, for studying the composition of phytoplankton, there was realized the hydrobiological analysis, statistical processing of the data was realized by the program MO Excel 2003. Research results. The most content of nitrogen oxides in water was observed in spring months as a result of washing nitrogen fertilizers out from soil at overflow, polyphosphates – in winter, when they are not used by phytoplankton. The growth of ammonia concentrations during a year was conditioned by the systematic income of flowing with nitrogen compounds that it was formed of in the water basin. The conducted correlative analysis showed negative weak and middle correlations between the content of separate biogens in water and the number of plankton water plants. Conclusions. 1. The studies determined that biogens concentrations didn’t exceed MPC s, and their seasonal dynamics was typical for nitrites, nitrates, polyphosphates and not typical for ammonia. The content of this substance in water (in average 0,42 mg/dm3) is more than the natural one (from 0,01 to 0,20 mg/dm3),and features of its fluctuations testified intensification of ammonification processes.   2. It was established, that in 2012-2014 there was observed “florescence” of water mainly at the  expanse of blue-green water plants (cianobacteria), which number increased in average in almost 12 times comparing with 2003-2005. At the same time veritable correlations of these water plants with biogens were lost (excluding  2013 year, when the correlation of the nitrates content with the number of blue-green ones was - 0,5780 and green -0,5458, and also the content of nitrites with the number of blue-green ones was at the level of  - 0,5743). 3. There was revealed the intensification of correlations of the ammonia content in water with the number of cells of green (-0,6577 in 2012) and diatomaceous (-0,5332 in 2013) water plant and vice versa – the essential weakening of correlations between the content of polyphosphates and representatives of phytoplankton of all sections, especially there took place the decrease of most values of their correlation coefficients with blue-green (from -0,6662 to -0,3255) and green  from -0,6118 to -0,3507) water plants. 4. The ground of these disorders in the water basin was the moderate systematic pollution of water by flowing at the background of climatic changes that was proved by ammonification activation and deceleration of nitrification transformation of nitrogen-containing biogens that is by processes that indicate the absence of the proper detoxication of ammonia in the water environment. For preventing the water intake pollution, it is necessary to prevent unapproved water flowing to it Author Biography Еlla Аrystarkhova, Zhytomyr National Agroecological University Stariy blvd., 7, Zhytomyr, Ukraine 10008 PhD, Associate Professor Department of environmental safety and economy of natural management

Keywords: