Dynamics of Scutellaria tuvensis (Lamiaceae) coenopopulations

The dynamics of density, abundance, ontogenetic structure and spatial organization of Scutellaria tuvensis coenopopulations under the influence of climatic factors in different habitat conditions has been studied. The decrease in the climate aridity in the basins of the Republic of Tuva in the last 10 years has a positive effect on the condition of the coenopopulations of S. tuvensis, occurring in dry and deseritied steppes. The coenopopulations of S. tuvensis are normal, stable, and in balance with the ecotope. The dynamics of the number, ecological density, spatial distribution of individuals in the coenopopulations, and the type of ontogenetic spectrum are influenced by climatic factors, while the values of demographic indicators in the coenopopulations are determined by the peculiarities of development of individuals in different habitats. Under a mildening climate (early warm spring and non-dry summer), optimal conditions are created for seed germination and further development of young plants. Recently, an increase in the number of young plants has been found in all habitats, a left-sided type of the ontogenetic spectrum is being formed, and coenopopulations are rejuvenating.