The monograph “The ionic composition of the Dniester River within the territory of the Republic of Moldova” by Nina Bagrin represents a synthesis of the results of long-term hydrochemical investigations conducted during 1981-2023 by the Laboratory of Hydrobiology and Ecotoxicology of the Institute of Zoology. The results obtained for the period 2020-2023 are based on investigations carried out directly by the author, while the previous data originate from the long-term studies of the laboratory. The monograph includes an analysis of the long-term, annual, and seasonal dynamics of major ions...