CHANGES IN ONTOGENETIC SPECTRUM AND DENSITY OF THE COENOPOPULATION OF DRACOCEPHALUM IMBERBE BUNGE (LAMIACEAE) IN REPUBLIC OF TUVA (RUSSIA) IN 17 YEARS
Gulnora R. Denisova, Vera A. Cheryomushkina, Alexey Y. Astashenkov
Central Siberian Botanical Garden SB RAS, Novosibirsk, Russia
Keywords: monitoring, dynamics, Dracocephalum imberbe, ontogenetic spectrum, demographic indicators
Abstract
This paper presents data on the dynamics of the ontogenetic structure of the coenopopulation of Dracocephalum imberbe Bunge, located in the tundra with Dryas oxyodontha Juz. and Kobresia simpliciuscula (Wahlenb.) Mackenz.in Republic of Tuva. Changes in the type of the ontogenetic spectrum and the density index of individuals are analyzed. It was revealed that fluctuating dynamic changes occurred during 17 years, which did not affect the type of ontogenetic spectrum and the normal distribution of ln(n + 1) density. The coenopopulation remains full-fledged. The calculated demographic indicators and indicators of the speed of development reflected a unidirectional type of dynamics towards its gradual rejuvenation.
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