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Abstract <p>The interannual structure of four coenopopulations (CPs) of <i>Dracocephalum peregrinum</i> L. located in the steppe communities of Siberia is considered. A range of ontogenetic spectra has been established: left-sided, centered, and bimodal. During the period studied, the ontogenetic spectra of all CPs show an accumulation of individuals of the pregenerative period; the proportion of the generative fraction in the CPs of Tuva increases (CP2, CP3), and those of Gornyi Altai (CP1) and Khakassia (CP4) decrease. Changes in the structure of the spectra occur for various reasons: a decrease in anthropogenic load (CP1–CP4), an increase in the amount of precipitation (CP2, CP3), the growth of shrubs in the cenosis (CP3), and microconditions of the local area (CP4). Demographic and development rate indicators confirmed the rejuvenation and stability of the studied CPs.</p>

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Multi-Annual Structure of Cenopopulations of Dracocephalum peregrinum L. in the Steppe Communities of Siberia (Russia)

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • G. R. Denisova,
  • V. A. Cheremushkina,
  • A. Yu. Astashenkov,
  • E. B. Talovskaya

摘要

Abstract

The interannual structure of four coenopopulations (CPs) of Dracocephalum peregrinum L. located in the steppe communities of Siberia is considered. A range of ontogenetic spectra has been established: left-sided, centered, and bimodal. During the period studied, the ontogenetic spectra of all CPs show an accumulation of individuals of the pregenerative period; the proportion of the generative fraction in the CPs of Tuva increases (CP2, CP3), and those of Gornyi Altai (CP1) and Khakassia (CP4) decrease. Changes in the structure of the spectra occur for various reasons: a decrease in anthropogenic load (CP1–CP4), an increase in the amount of precipitation (CP2, CP3), the growth of shrubs in the cenosis (CP3), and microconditions of the local area (CP4). Demographic and development rate indicators confirmed the rejuvenation and stability of the studied CPs.