Analysis of the ecological condition of water and bottom substrates biotesting method on microalgae

Abstract

In the summer and autumn of 2019, biotesting of water and bottom sediments of Ukrainian, Romanian and Bulgarian reservoirs with different anthropogenic load and the influence of various anthropogenic factors was carried out. Our studies show that the presence of toxic substances for the reproduction of the laboratory culture of the planktonic alga Desmodesmus communis in the vast majority of the studied territories has not been established. The results of biotesting showed that the state of the aquatic environment in shelf waters is better than in coastal water bodies of Northwestern Black Sea (NWBS). Installed that the water areas of the NWBS, which include: coastal reservoirs of Ukraine, areas affected by river runoff (Danube, Dniester, Dnieper-Bug); areas of NWBS ports; urban waste water and their influence areas; the zone of mixing of river and sea waters; the central part of the Ukrainian; part of the shelf zone of the Black Sea; as well as water bodies in Romania and Bulgaria - constant environmental monitoring is required.