Ontogenetic structure dynamics of coenopopulations of Dracocephalum fruticulosum Stephan (Lamiaceae, Magnoliópsida) in Tuva

Denisova, G. R.; Cheryomushkina, V. A.; Astashenkov, A. Yu.; Talovskaya, E. B.

doi:10.35885/1684-7318-2022-3-255-267

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…In plant populations, the ontogenetic structure is often stable for one species (e.g., Pyrola chlorantha [43], Dracocephalum fruticulosum [44]) over a certain study period, with…”

Section: Discussionmentioning

confidence: 99%

“…In plant populations, the ontogenetic structure is often stable for one species (e.g., Pyrola chlorantha [ 43 ], Dracocephalum fruticulosum [ 44 ]) over a certain study period, with some fluctuations. Under unfavourable conditions, the ontogenetic structure of some perennial plants can be changed (e.g., orchids [ 40 ], Pulsatilla vernalis , see [ 45 ]).…”

Section: Discussionmentioning

confidence: 99%

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Population Status of a Regionally Endangered Plant, Lunaria rediviva (Brassicaceae), near the Eastern Border of Its Range

Khapugin

Chugunov

2023

Biology

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Long-term studies of plant populations provide valuable knowledge on the influence of various environmental factors on plant species. The status of edge-range species populations is especially important to be studied due to their higher vulnerability to extinction. This paper aimed to study the Lunaria rediviva population at the eastern border of its range (National Park “Smolny”, Republic of Mordovia, Russia). The study was carried out in 2013–2018. Assessment of the L. rediviva population was performed on the basis of individual parameters of plants (height of the individual, number of leaves per individual, number of inflorescences, flowers, fruits per one generative individual, and the fruit set), and density of individuals. Ontogenetic structure of the population was identified by distinguishing juvenile, mature vegetative, and reproductive individuals. The relationships between weather conditions (mean values of temperature, air moisture, wind strength, precipitation divided to three decades per month) and population parameters of L. rediviva were identified. Results showed changes in the ontogenetic structure of the population. The type of its population changed from vegetatively oriented to bimodal, with a decrease (R2 = 0.686) in the proportion of mature vegetative individuals. We demonstrated a significant decline in some parameters of the L. rediviva reproduction. We found a significant negative correlation between the fruit set and the moisture at mid-July (r = −0.84, p < 0.05), and wind strength in late May (r = −0.83, p < 0.05) and early June (r = −0.83, p < 0.05). It was found that the number of both flowers and fruits per individual is significantly positively correlated with the precipitation in late April, and they negatively correlated with these parameters and the temperature in late July. We assume that the habitat shading negatively influences the L. rediviva population status.

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“…In plant populations, the ontogenetic structure is often stable for one species (e.g., Pyrola chlorantha [43], Dracocephalum fruticulosum [44]) over a certain study period, with…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Population Status of a Regionally Endangered Plant, Lunaria rediviva (Brassicaceae), near the Eastern Border of Its Range

Khapugin

Chugunov

2023

Biology

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Functional characters and ontogenetic structure of populations of Ziziphora clinopodioides (Lamiaceae) at the range border (Republic of Khakasia)

Barsukova,

Godin,

Cheryomushkina

et al. 2024

Botanicheskii Zhurnal

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The object of this study is a characteristic subshrub of Khakasia, Ziziphora clinopodioides (Lamiaceae). The study of functional traits and the structure of the Z. clinopodioides populations at the eastern limit of its distribution (Republic of Khakasia) has been carried out for the first time. The materials were collected in 2022–2023 in true and meadow steppes of the forest-steppe belt. Environmental factors influencing functional traits and the ratio of individuals of different ontogenetic states have been identified. It has been established that disturbed steppes on sandy soils with the presence of stones and low moisture represent the ecological optimum for this species. Under these conditions, the indices of most of the studied functional traits (the number of vegetative shoots per 1 composite skeletal axis, the number of generative shoots with paracladia, the number of paracladia, the number of flowers in paracladia, the number of flowers in the main inflorescence) reach the highest values. In undisturbed steppes on sandy loam soils with moderate moisture, Z. clinopodioides is in unfavorable conditions, and develops individuals with minimal values of functional traits. All the studied populations are normal, complete or incomplete. Left-sided and bimodal ontogenetic spectra are formed in disturbed steppes on sandy soils with the presence of stones and low moisture; in the undisturbed steppe on sandy loam soil with moderate moisture, the spectrum type is bimodal. The density of individuals depends on the degree of soding in the community and anthropogenic load. With an increase in the total projective cover and in the absence of anthropogenic impact, the density of individuals decreases. The causes of restructuring of functional characters and changes in the ontogenetic spectrum of populations of Z. clinopodioides under the influence of various environmental factors at the range border are discussed.

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Different-year structure of the coenopopulations of <i>Dracocephalum ruyschiana</i> L. (Lamiaceae, Magnoliopsida) in the Altai mountains (Russia)

Denisova,

Cheryomushkina,

Astashenkov

et al. 2024

Povolžskij èkologičeskij žurnal

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The different-year structure of two coenopopulations (CP 1 and CP 2) of Draco- cephalum ruyschiana L. located in different ecological and cenotic conditions of the Altai Mountains is considered. The monomodality of the ontogenetic spectra with the predominance of mature generative individuals has been established. In the ontogenetic spectra, there is an accumulation of young plants and a reduction in the proportion of old individuals. A density drop in CP 1 from 2004 till 2022 and an increase in CP 2 from 2008 till 2022 were revealed. The calculated demographic indicators and those of the development rate confirm the rejuvenation of the studied CP. According to the delta–omega classification, CP 1 develops from aging to mature, while the type of CP 2 has not changed, it remains mature. Our CP analysis shows a significant vulnerability of demographic indicators from non-simultaneous germination of seeds due to their different dormancy and the amount of precipitation. Also, the changes in the ontogenetic structure and demographic indicators in 2022 are caused by overgrowth of the communities with shrubs, namelt: Caragana arborescens Lam., Spiraea trilobata L., Cotoneaster niger (Ehrh.) Fr. in CP 1, and the presence of plant debris in CP 2.

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Ontogenetic structure dynamics of coenopopulations of Dracocephalum fruticulosum Stephan (Lamiaceae, Magnoliópsida) in Tuva

Cited by 3 publications

References 6 publications

Population Status of a Regionally Endangered Plant, Lunaria rediviva (Brassicaceae), near the Eastern Border of Its Range

Population Status of a Regionally Endangered Plant, Lunaria rediviva (Brassicaceae), near the Eastern Border of Its Range

Functional characters and ontogenetic structure of populations of Ziziphora clinopodioides (Lamiaceae) at the range border (Republic of Khakasia)

Different-year structure of the coenopopulations of <i>Dracocephalum ruyschiana</i> L. (Lamiaceae, Magnoliopsida) in the Altai mountains (Russia)

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