Coenopopulations of a widespread Eurasian species, Anthriscus sylvestris, were studied in different environmental conditions of the Forest Zone in Ukraine. To investigate structural and functional features of species adaptation, the following model coenopopulations were studied: at the edge of oak forest in Kyiv Region, on disturbed wetland meadow, on ruderal area and in alder thickets in Zhytomyr Region. A morphometric analysis was conducted, account number was recorded, and absolute dry weight of plants in the model areas was determined. The morphometric characters, namely height and weight of plants, number of buds, flowers, seeds, buds diameter, were measured. The level of species variability was defined on the basis of morphometric criteria and phytomass. The highest plant populations are characteristic for open habitats, and the lowest ones were observed in coenopopulations of alder coenosis. In areas with rich soil, the species reaches the greatest biomass and a large number of individuals in the clone. The studied characteristics of coenopopulations are varying from 13% to 85%. Accodring to ontogenetic analysis, vegetative individuals prevail over generative in each of the seven model populations. However, total phytomass of generative individuals is higher (for some coenopopulations in several times) than that of pregenerative ones. Correlation analysis showed low levels of interdependencies between the features. The study of A. sylvestris populations allowed to establish biological features of the species in forest area of Ukraine and its adaptation potential. Left-hand ontogenetic spectrum in all model coenopopulations and domination of generative individuals indicate of their invasive nature.

Keywords: population, adaptation, Forest zone, morphometric characteristics, ontogeny, biomass

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