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The paper sums up the scientific organizational activity carried out by the Dagestan Department of the Dokuchaev Soil-Science Society for 50 years of the research on soils of Dagestan and other regions. The coordinating role of the department is shown by implementing the priority measures, including organizing the Department of Biology and transforming it… (More)
Four blocks of terrestrial–aquatic ecotones, namely, aquatic, fluctuation, dynamic, and distant ecotones, have been distinguished and characterized. The blocks are differentiated in space and time and represent a complete formation. This is proved by species saturation at the level of the modern structure and previous area genetic relations.