Abstract
The results of studying the spatial-ontogenetic structure of five cenopopulations of Globularia bisnagarica L. on the territory of the Orenburg region and the Republic of Tatarstan are presented. Analysis of the age structure using the OntoParam program algorithm revealed the heterogeneity of ontogenetic spectra in most cenopopulations. Assessment of the parameters of average age, recovery index and ageing index showed that most cenopopulations are capable of self-restoration and maintenance of numerosity. Analysis of spatial structure taking into account the ontogenetic state of individuals showed that the spatial relationships between pregenerative and generative individuals is random in most cases, which indicates the absence of any pronounced interactions between plants from these age groups. In the cenopopulation from Severny district of the Orenburg region, there is a slight sparseness in the mutual arrangement of pregenerative and generative individuals, which may be due to the influence of intraspecific competition.
Highlights
Analysis of the age structure using the OntoParam program algorithm revealed the heterogeneity of ontogenetic spectra in most cenopopulations
Analysis of spatial structure taking into account the ontogenetic state of individuals showed that the spatial relationships between pregenerative and generative individuals is random in most cases, which indicates the absence of any pronounced interactions between plants from these age groups
In the cenopopulation from Severny district of the Orenburg region, there is a slight sparseness in the mutual arrangement of pregenerative and generative individuals, which may be due to the influence of intraspecific competition
Summary
Исследование проводилось в 2020 г. в пяти ценопопуляциях (ЦП) G. bisnagarica, произрастающих на территории Оренбургской обл. 1. Местоположение исследованных ценопопуляций Globularia bisnagarica L.: Alb – Оренбургская обл., Пономаревский р-н, окр. Location of the studied Globularia bisnagarica cenopopulations: Alb – Orenburg region, Ponomarevsky district, Alyabyevo; Slt – Orenburg region, Aleksandrovsky district, Sultakay; Bkv – Orenburg region, Severny district, Bakaevo; Bvl – Republic of Tatarstan, Bavlinsky district, Bavly; Krb – Republic of Tatarstan, Bugulminsky district, Karabash (color online). Для каждой ЦП в пределах постоянной пробной площади случайным образом закладывались 7 учетных площадок площадью 1м2, на которых подсчитывались особи G. bisnagarica с учетом онтогенетических состояний. Для анализа онтогенетических спектров исследуемых ЦП использовались такие параметры, как средняя возрастность [4], индекс восстановления и индекс старения [5, 6]. Для выявления особенностей пространственной структуры ЦП две учетные площадки были закартированы с использованием условных обозначений, указывающих на принадлежность особей к той или иной возрастной группе. Все вычисления проводились в среде статистического программирования R [12]
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