Analysis of the vitality structure of the Ambrosia artemisiifolia L. cenopopulations on the Piedmont Crimea

Abstract

Ambrosia artemisiifolia L. is an invasive species of North American origin, widely distributed in various cenoses of the Crimea. The study was conducted in the conditions of the Piedmont Crimea in 2021 in 12 cenopopulations. Four groups of system indicators were identified: ecological-biological, biological, ecological and genotypic according to the ratio of general and consistent variability. The vitality structure of the species was studied taking into account ecological and biological system indicators: the number of branches, the number of leaves and the length of the male apical inflorescence. Seven cenopopulations were classified as prosperous, most of which were noted in ruderal communities. The depressive type of vitality is more typical for 4 cenopopulations, described mainly in segetal and synanthropized communities. Equilibrium cenopopulation was noted in the ruderal community. The dynamics of morphological integration depending on the conditions of cenoses is studied. A high index of dimensional plasticity of the species (5.75) was established, and it was also determined that in the conditions of the Piedmont Crimea, a combined type of ontogenetic SR-strategy is characteristic of the species.