Komisova T. E.

The article discusses the use of algaflora in the sediment of river Lugan as indicators of water pollution with radionuclides. It is found that the constant absolute indicators of a certain level of specific activity of radionu-clides 226Ra, 232Th, 137Cs, 40K are those genera of algaes like Volvox, Cymbella, Gomphonema, Chroo-ciccus. Permanent indicators on the content of 226Ra, 232Th, 137Cs, 40K in river silt revealed algae genera Chlorococcum, Chlorella, Pandorina, Pinnularia, Navicula, Oscillatoria. Based on the calculated regression equations for the number of algae sediments can predict the specific activity of these radionuclides.

The article shows the direction of successional processes around the coal mines dumps in Krasnodon city, Luhansk region. On the territory of the newly-formed dumps successional processes are characterized by the settlement of pioneer, mostly synanthropic, poorly formed vegetation. While on the territory of older dumps successional processes proceed in two stages and are notable for the cascading effect.