Ontogenetic structure dynamics of coenopopulations of Dracocephalum fruticulosum Stephan (Lamiaceae, Magnoliópsida) in Tuva
https://doi.org/10.35885/1684-7318-2022-3-255-267
Abstract
Data on the dynamics of the ontogenetic structure of two cоenopopulations (CP) of Dracocephalum fruticulosum located in various ecological and cenotic conditions of Tuva are presented. The changes in the type of the ontogenetic spectrum and the density index of individuals were analyzed. A sharp decrease in density was revealed in both CP during 18 years. The monomodality of the ontogenetic spectrum was established during all the years of our study. There was a change in the type of the cenopopulations, namely, from transient to aging in CP 1 and from transient to mature in CP 2. The calculated demographic indicators and the rate of development reflect the unidirectional dynamics of the CP structure, namely, a successive type in CP 1, and a wave-fluctuation type in CPU 2. CP analysis showed significant vulnerability of demographic indicators. Changes in the coenopopulations are due to different causes: overgrowth of Selaginella sanguinolenta communities in CP 1, anthropogenic impact (grazing) in CP 2, weak seed setting and germination.
Keywords
Supporting agencies: The work was carried out according to the draft State assignment of the Central Siberian Botanical Garden SB RAS (No. AAAAA 21-121011290026-9).
About the Authors
G. R. Denisova
Central Siberian Botanical Garden of the Siberian Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
Gulnora R. Denisova
101 Zolotodolinskaya St., Novosibirsk 630090
V. A. Cheryomushkina
Central Siberian Botanical Garden of the Siberian Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
Vera A. Cheryomushkina
101 Zolotodolinskaya St., Novosibirsk 630090
A. Yu. Astashenkov
Central Siberian Botanical Garden of the Siberian Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
Alexey Yu. Astashenkov
101 Zolotodolinskaya St., Novosibirsk 630090
E. B. Talovskaya
Central Siberian Botanical Garden of the Siberian Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
Evgeniya B. Talovskaya
101 Zolotodolinskaya St., Novosibirsk 630090
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For citations:
Denisova G.R., Cheryomushkina V.A., Astashenkov A.Yu., Talovskaya E.B. Ontogenetic structure dynamics of coenopopulations of Dracocephalum fruticulosum Stephan (Lamiaceae, Magnoliópsida) in Tuva. Povolzhskiy Journal of Ecology. 2022;(3):255-267. (In Russ.) https://doi.org/10.35885/1684-7318-2022-3-255-267
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