Dynamics of Changes in Saprobity of Water Bodies of the Kursk Region

Abstract

The purpose of this study is a comparative characteristic of saprobity and assessment of water quality by indicator zooplankton species of reservoirs and watercourses of the Kursk region for 1996, 2004 and 2014, identifying the dynamics of changes. Materials and methods. Hydrobiological indicators of saprobity for zooplankton communities are analyzed. Determination of water quality in reservoirs and watercourses of the Kursk region was carried out by the method of Pantle and Buk in the modification of Sladechek from 1996 to 2014. It is proved that this method gives reliable qualitative results in the conditions of the Kursk region. Results and discussion. The dynamics of the increase in saprobity indices in all the studied reservoirs and watercourses of the Kursk region has been revealed. At some monitoring points, a change in the saprobity class was revealed in a big way, i.e. the environmental situation changed for the worse. Conclusions. In general, the Swapa River is classified as reservoirs with background saprobity – betamesosaprobic. The Tuskar River belongs to the alphabetamesosaprobic class. On the Seim River, the zooplankton community corresponds to betamesosaprobic conditions. Saprobity indices have increased significantly over the years of monitoring at the studied large reservoirs – the Kopyonkov reservoir and the Mikhailovsky mining processing plant. On small reservoirs there are two ponds on the Ryasnik River, over the years of research, the saprobity class has changed – from slightly polluted to moderately polluted.