Abstract
In Siberia (Novosibirsk region, Altai Republic and Khakassia), 12 coenopopulations of Medicago falcata L. were studied in different growing conditions. The most important indicators operating at the organismal and population levels were studied, adaptation mechanisms were identified and the strategy of the species was determined. A score is given for 5 organismal and 5 population indicators in each habitat. The maximum sum of points in meadow-steppe habitat conditions characterizes the optimal state of the species. The pessimal state is determined by the minimum values of most parameters of the species. It was found in steppe habitats subject to heavy grazing with stages III–IV of pasture digression. It has been established that in anthropogenic habitats M. falcata can exist on the territory for a long time due to a decrease in the vitality of individuals and a tolerant strategy.