Review of the long term research results using the author's method of graphical analysis

The work describes new method of graphical analysis developed for freshwater ecosystems and three scenarios of their transformation were documented. The parameters of the structure-forming groups of hydrobionts, which determine their stability, are established. The transformations recorded in natural or natural-technogenic systems were analyzed using a similar method. The similarity of those scenarios allows us to refer all the considered systems to the systems of the fourth level of complexity.