scholarly journals The structure and state of populations of Iris pumila L. in the Samara region

2020 ◽  
Vol 19 (2) ◽  
pp. 302-306
Author(s):  
V. N. Ilyina
Keyword(s):  
Rare Species ◽  
Demographic Parameters ◽  
Ontogenetic Structure ◽  
Iris Pumila

Data on the ontogenetic structure of natural coenopopulations of the rare species Iris pumila L. arepresented. Ontogenetic spectra, demographic parameters, and the type of coenopopulations are determined by the “deltaomega” criterion. Of the 30 cenopopulations studied, 18 are mature, 5 are transitional, 4 are aging, 3 are ripening. Averagedensity – 2.8 individuals per 1 m2.

scholarly journals Demographic structure of Caryophyllaceae Juss. rare species coenopopulations in Uzbekistan

2020 ◽  
Vol 24 ◽  
pp. 00081
Author(s):  
Khabibullo Shomurodov ◽  
Ozodbek Abduraimov ◽  
Nodira Rakhimova ◽  
Vasila Sharipova ◽  
Rizamat Khayitov
Keyword(s):  
Soil Moisture ◽  
Plant Communities ◽  
Rare Species ◽  
Stable State ◽  
Biological Characteristics ◽  
Demographic Structure ◽  
Ecological Conditions ◽  
Ontogenetic Structure ◽  
The Republic ◽  
Kyzylkum Desert

The article is devoted to the assessment state of the ontogenetic structure of some rare species of the Caryophyllaceae Juss. (Acanthophyllum cyrtostegium Vved. and Silene tomentella Schischk.), listed in the Red book of the Republic of Uzbekistan. In different ecological conditions and plant communities in the Kyzylkum desert, the studied coenopopulations are normal, but incomplete. In most cases, yang grows is absent, which indicates an irregular renewal and elimination of young individuals due to lack of soil moisture, which is often observed in desert conditions. The ontogenetic spectra of investigated coenopopulations are centered and it coincides with the theoretically established spectrum. This, in general, reflects the biological characteristics of the studied species and indicates a stable state of the examined coenopopulations.

scholarly journals State of populations of the rarest protected vascular plants of the “Strizhament” (Stavropol Krai)

2020 ◽  
Author(s):  
L.N. Arutyanova ◽  
◽  
A.A. Ogandzhanian ◽  
Keyword(s):  
Rare Species ◽  
Vascular Plants ◽  
The State ◽  
Ontogenetic Structure ◽  
Stavropol Krai

The state and structure of Anemone caucasica Willd cenopulations has been studied. ex Rupr., Campanula persicifolia L., Vincetoxicum stauropolitanum Robed. – rare species included in the Red Book of the Stavropol Krai (KKSK). The area, number and density of individuals in the CPU were determined, the ontogenetic structure was studied, which allows characterizing the state and prospects for the development of cenopulations.

scholarly journals On the dynamics of the ontogenetic structure of Astragalus henningii (Stev.) Klok. cenopopulations. (steppe Trans-Volga region)

2021 ◽  
Vol 20 (1) ◽  
pp. 221-224
Author(s):  
V. N. Ilyina
Keyword(s):  
Rare Species ◽  
Volga Region ◽  
Absolute Maximum ◽  
Ontogenetic Structure ◽  
The Absolute

Data on the ontogenetic structure of natural cenopopulations of the rare species Astragalus henningii (Stev.)Klok. on the territory of the Samara steppe Trans-Volga region are presented. Ontogenetic spectra have been determinedfor 35 cenopopulations on the territory of natural monuments of regional significance in the Samara region (Koshkinskaya Balka, Balka Kladovaya, Kostinskye loga, Gryzly, Mulin dol). The basic ontogenetic spectrum of cenopopulationsis one-vertex right-modal, the absolute maximum in it is represented by old generative individuals (35.7 %). The ontogeny of the species is at least 20 years, the longest in terms of time are the mature generative – 6–9 years and the old generative – 5–8 years.

scholarly journals Vegetation characteristics of the Gubinsko-Troekurovskie Heights (Samara Region)

2017 ◽  
Vol 6 (2) ◽  
pp. 60-64
Author(s):  
Lubov Alexandrovna Novikova ◽  
Sergey Vladimirovich Saksonov ◽  
Vladimir Mikhailovich Vasjukov ◽  
Sergey Evgenyevich Gorlov ◽  
Stepan Aleksandrovich Senator ◽  
...  
Keyword(s):  
Rare Species ◽  
Vascular Plants ◽  
Ephedra Distachya ◽  
Mixed Grass ◽  
Iris Pumila ◽  
Pulsatilla Patens ◽  
Steep Slopes ◽  
Bupleurum Falcatum ◽  
Strong Erosion ◽  
Gentiana Cruciata

In the flora of Gubinsko-Troekurovskie heights (Samara Region) the authors identified 467 species of vascular plants, including 26 rare species: Adonanthe vernalis , Astragalus zingeri , Bupleurum falcatum , Catabrosella humilis , Clausia aprica , Cotoneaster laxiflorus , Crataegus volgensis , Ephedra distachya , Ferula caspica , Fritillaria ruthenica , Galatella angustissima , Gentiana cruciata , Hedysarum grandifolium , Iris aphylla , Iris pseudacorus , Iris pumila , Jurinea ledebourii , Jurinea multiflora , Koeleria sclerophylla , Linum perenne , Polygala sibirica , Pulsatilla patens , Scabiosa isetensis , Stipa korshinskyi , Stipa pennata , Thymus zheguliensis . Bunchgrass real steppes with the domination of Stipa capillata and Cleistogenes squarrosa develop on flatter areas. Bunchgrass real steppes with domination of Stipa pennata , Stipa lessingiana and Helictotrichon desertorum are also formed on the gentle slopes (angle less than 30). Calciphyte legumes real steppes with domination of Astragalus tenuifolius , mixed grass real steppes ( Potentilla glaucescens , Centaurea carbonata ) and semi-shrubs real steppe ( Ephedra distachya , Onosma volgensis , Thymus zheguliensis ) develop on steep slopes (angle more than 30). Strong erosion steep slopes often contribute to the preservation and maintenance of the populations of many rare species for the Samara Region.

scholarly journals Features of the flora and vegetation of the Pyatigorye’s upland steppes (ecoregion of the Caucasian Mineral Waters)

2021 ◽  
Vol 20 (1) ◽  
pp. 61-65
Author(s):  
V. N. Belous
Keyword(s):  
Rare Species ◽  
Biological Diversity ◽  
Field Studies ◽  
Mineral Waters ◽  
Relief Elements ◽  
Steppe Communities ◽  
Iris Pumila ◽  
Main Factors ◽  
Paeonia Tenuifolia ◽  
Rock And Soil

The article deals with the issues of localization and landscape preference of Pyatigorye’s phytocenoses ofthe upland steppes. The syntaxonomic composition of the steppe communities on the studied territory, as well as the typesof the floristic core, are indicated. It consists of graminoids, mesothermal perennials of long vegetation, caudex herbs ofan ephemeroid type of development, and bulbous geophytes. The features of communities, the reasons for their spatialdifferentiation are revealed. The distribution of species by relief elements and communities was determined expertlyon the basis of field studies (2018–2021). It was concluded that the main factors determining the diversity of uplandsteppe vegetation in the studied region are the nature of the destruction of the parent rock and soil development, the levelof insolation and ecotope moisture. The steppe communities of Pyatigorye on carbonate underdeveloped thin skeletalchernozems are distinguished by their species richness. In most of them, Stipa pulcherrima plays a high phytocenotic role,as well as other sod and dense bush grasses. Species of the “southern” steppe and Caucasian forbs, incl. petrophytes playsignificant role. The communities include rare species in the region: Astragalus brachycarpus, Dictamnus gymnostylis,Leopoldia tenuiflora, Paeonia tenuifolia, Iris pumila, I. aphylla, Orchis tridentata, Asphodeline taurica, Lamyra echinocephala,Linum tauricum, Onosma caucasica, Cerasus incana, Cephalaria coriacea. The studied representative communities areimportant for the conservation of the biological diversity of the region. Habitats of rare species are of scientific importanceand are of nature conservation interest.

scholarly journals STATE OF CENOPOPULATIONS OF SOME RARE SPECIES OF PLANTS OF SAMARA REGION iN THE TERRITORY OF NATURE MONUMENT OF REGIONAL IMPORTANCE "SERNOVODNY SHIKHAN"

2021 ◽  
Vol 31 (1) ◽  
pp. 5-15
Author(s):  
T.E. Zenkina ◽  
V.N. Il'ina
Keyword(s):  
Rare Species ◽  
Soil Cover ◽  
Local Density ◽  
Age Groups ◽  
Energy Costs ◽  
Density Maps ◽  
Ontogenetic Structure ◽  
Random Placement ◽  
Mosaic Distribution ◽  
Independent Distribution

The condition of cenopopulations of four rare species ( Artemisia salsoloides , Hedysarum grandiflorum , Oxytropis floribunda , Stipa korshinskyi ) in the petrophytic steppes of the High Zavolzh'yе (High Transvolga, Samara region) was studied on the basis of the regularities of their spatial and ontogenetic structure. The data were processed using the software package R, which allows us to perform calculations of spatial statistics. Thus, stationarity, isotropy, and intensity of plant objects location were evaluated. The mosaic distribution of individuals of all species recorded within the boundaries of the study area was characterized. Using local density maps, the sparseness of individuals on the outskirts of the model site, caused by cattle grazing, was revealed. The behavior of the Ripley's function showed an independent distribution of species as a consequence of weak interspecies competition. The spatial pattern and age spectrum of the studied rare protected dominant species were analyzed. The absence of seedlings and senile plants due to exposure to unfavorable factors of exogenous nature was noted. The im-v and g states were the most numerous. In accordance with the behavior of the K(r) function, the random placement of the four predominant species was revealed, indicating their optimal location within the study area. Patterns of mutual placement of pregenerative and generative individuals of Artemisia salsoloides, Hedysarum grandiflorum, and Oxytropis floribunda were studied. Calculation of the Ripley's cross-function showed that individuals of different age groups of the described species are located independently from each other, demonstrating the absence of intraspecific competition. Undoubtedly, the spatial distribution of individuals of the plant species composing the phytocenosis is influenced both by grazing and by the features of the soil cover of the site, which is manifested by significant elimination of plants at the initial stages of ontogenesis. Nevertheless, the cenopopulations of rare species are stable, mature and promising, and the individuals are distributed in an optimal way that minimizes energy costs.

scholarly journals Features of the Demographic Structure and the Condition of Populations of the Rare Relic Hedysarum Gmelinii Ledeb. (Fabaceae) in Peripheral and Central Parts of Its Distribution Range

2020 ◽  
Vol 74 (6) ◽  
pp. 385-395
Author(s):  
Larisa M. Abramova ◽  
Valentina N. Ilyina ◽  
Anna E. Mitroshenkova ◽  
Alfia N. Mustafina ◽  
Zinnur H. Shigapov
Keyword(s):  
Rare Species ◽  
Distribution Range ◽  
Anthropogenic Load ◽  
Volga Region ◽  
Altai Mountains ◽  
Demographic Structure ◽  
High Moisture ◽  
Middle Volga Region ◽  
Ontogenetic Structure ◽  
Middle Volga

AbstractThe features of the ontogenetic structure of cenopopulations of a rare species Hedysarum gmelinii Ledeb. (Fabaceae) were studied on the periphery of its range (the Middle Volga region and the Bashkir Cis-Urals) and in its central part (the Altai Mountains region). Types of cenopopulations were determined according to the “delta-omega” criterion: in the Bashkir Urals, they were mostly young, in the Middle Volga region, they were mature, in the Altai Mountains, they were maturing. The proportion of pregenerative individuals in populations increases in habitats with high moisture levels. Anthropogenic load (mainly in the form of grazing) had a greater effect on the number and density of individuals, rather than on the type of ontogenetic spectrum of cenopopulations.

scholarly journals Genetic and phenotypic diversity of rare species of genus Iris L in the Southern Urals

2020 ◽  
Author(s):  
E. V. Mikhaylova ◽  
A. N. Mustafina
Keyword(s):  
Genetic Markers ◽  
Rare Species ◽  
Phenotypic Diversity ◽  
Southern Urals ◽  
The Southern Urals ◽  
Iris Pumila ◽  
First Time

We studied 11 populations of rare species Iris pumila and I. scariosa in Southern Urals. Sequencing of four different genetic markers was performed for the first time.

scholarly journals Інтегральна оцінка стану популяцій рідкісних видів рослин

2017 ◽  
Vol 7 (2) ◽  
pp. 201-209
Author(s):  
G. Klimenko ◽  
A. Kovalenko ◽  
Yu. Lykholat ◽  
N. Khromykh ◽  
O. Didur ◽  
...  
Keyword(s):  
Population Density ◽  
Population Size ◽  
Plant Species ◽  
Rare Species ◽  
Field Size ◽  
Rare Plant ◽  
Population Status ◽  
Plant Populations ◽  
Ontogenetic Structure ◽  
Vital Structure

<p>The decline in the global biodiversity and the increase in the number of threatened plant species are the extremely unfavorable trends over the past decades. These phenomena determined the need for the thorough and detailed study of the plant population resistance mechanisms, and the development of the methods to predict the risks of their extinction. In the recent years, simultaneous assessment of the ontogenetic and the vital structure of the populations has become the most recognized method of studying populations. This approach has provided a significant increase in the reliability assessment of the population status and led to improved predictions of their dynamics. However, there are a limited number of the papers containing the complex demographic analysis, including the field size of the population, the number of individuals in the population, the population density, as well as genetic, ontogenetic, and vital structure of the populations with their dynamics. The purpose of this work was to determine the current state and to predict the possible trends in the status of seven rare plant species’ populations located on the territory of the National Nature Park “Desnyansko-Starogutsky” (Sumy province, Ukraine). Rare plants <em>Epipactis helleborine</em> (L.) Crantz, <em>Lilium martogon</em> L., <em>Listera ovata</em> (L.) R. Br., <em>Platanthera chlorantha</em> (Cust.) Rchb., and <em>Pulsatilla patens</em> (L.) Mill. are the species listed in the Red Book of Ukraine. Plant species <em>Circaea alpina</em> L. and <em>Pyrola chlorantha</em> Sw. are designated as the rare species on the territory of Sumy region. Integral estimation of the population status has based on the determination of such parameters as population size, population density, the ontogenetic index, and the index of the population vitality. Correlation analysis revealed a high level of correlation (r = 0. 99) not between everyone, but between some of the population parameters only. In our study, the indices that characterize the ontogenetic structure of the populations were the most frequently correlated: renewal index, generative index, as well as indexes of the population age (Δ) and the effectiveness of the population (ω). The regression analysis revealed that the long-term monitoring of the rare plant populations will be an integral character in the case of accounting for such factors as the population size and density dynamics over the years, changes in the population vitality (Q), and the annual changes of the magnitude of ω, which integrates the ontogenetic structure of the populations. It has been established that the populations of <em>L</em><em>.</em><em> martagon</em> from the phytocenoses of <em>Pinetum coryloso-maіanthemosum</em> and <em>Fraxinetum coryloso-convallariosum</em> were stable enough together with the progressive development trend. The populations of the rare species <em>C</em><em>.</em><em> alpina</em>, <em>L</em><em>.</em><em> martagon</em> (habitat between <em>Betuleta corylosa</em> and <em>Pineta corylosa-convallariosum</em>), and <em>P</em><em>.</em><em> patens</em> were estimated as the sustainable. A clear tendency toward a decrease in the individuals’ number was found in rare species represented by only one population (<em>L. ovata</em>, <em>P. chlorantha</em>, and <em>Pl. chlorantha</em>), as well as in one of the several populations of the species <em>C</em><em>.</em><em> alpina</em><em> </em>and <em>E. helleborine</em>. It was confirmed, that the dynamics of the rare plant populations is influenced not only by the internal population processes. The external ecological and coenotic factors, including the ones of a catastrophic nature, which are associated with the succession processes, as well as the level of wildlife conservation in the natural areas of Ukraine can be of decisive importance.</p>

Sign in / Sign up

Export Citation Format

Share Document