Abstract
The dynamics of allelopathic effects of the soil was assessed within seven months of the growing season after simulating a one-time recreational load in seven forest ecosystems of the humid subtropics of the Sochi Black Sea region. Using the index of allelopathic activity of the soil and the index of the relative allelopathic effect, the seasonal dynamics of stimulation and inhibition of the growth processes of the biotest was traced, depending on the presence of a certain tree species, the magnitude of a one-time recreational load and the time elapsed since anthropogenic impact. The rows of forest ecosystems were compiled in terms of the resistance of edaphic conditions to recreational impact and the resistance to the introduction of new species under the canopy of the forest stand in the range of recreational loads of 1.39–8.33 people/ha.
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