The results of our study of 23 natural cenopopulations of Cephalaria uralensis (Murr.) Schrad. ex Roem. et Schult., a rare subendemic species of the Eastern European steppe zone, in the Trans-Volga and Cis-Urals regions (in the territory of Bashkortostan Republic, the Samara and Orenburg regions) are presented. Density indices, features of the age structure and demographic indices were studied and compared. The total density varies from 2.2 to 10.3 ind./m2. The averaged ontogenetic spectrum of C. uralensis is centered. By the delta-omega classification, the populations of C. uralensis are distributed from young ones to growing old. In the majority of the populations of the species the restitution and aging indices are very low. The research conducted allows us to assume that the C. uralensis populations in the South Urals, in the Trans-Volga and Cis-Urals regions are in a satisfactory state. There is a threat for the species: violation of its habitats owing to excessive cattle pasture.


Abramova L. M., Karimova O. A., Andreeva I. Z. Structure and the state of coenopopula-tions of Althaea officinalis (Malvaceae) in the South Urals (Bashkortostan Republic). Rastitelnye Resursy, 2010. vol. 46, no. 4, pp. 46–53 (in Russian).
Abramova L. M., Mustafina A. N., Andreeva I. Z. Modern State and Structure of Natural Populations of Dictamnus gymnostylis Stev. in the South Urals. Bull. of Moscow Society of Naturalists, Biological Ser., 2011, vol. 116, iss. 5, pp. 32–38 (in Russian).
Abramova L. M., Karimova O.A., Andreeva I. Z. On the Ecololgy and Biology of Althaea officinalis L. (Malvaceae) at the Northern Border of its Range (Bashkortostan Republic). Contemporary Problems of Ecology, 2013, vol. 6, no. 4, pp. 415–425. 
Abramova L. M., Iljina V. N., Karimova O. A., Mustafina A. N. Comparative Analysis of Population Structure of Hedysarum grandiflorum (Fabaceae) in Samara Region and Bashkortostan Republic. Rastitelnye Resursy, 2016, vol. 52, no. 2, pp. 225–239 (in Russian).
Glotov N. V. About the Estimation of age Structure Parameters of Plants Populations. Life of Populations in the Heterogeneous Environment. Yoshkar-Ola, Рeriodical Press Mari El, 1998, part 1, pp. 146–149 (in Russian).
Zhivotovsky L. A. Ontogenetic States, Effective Density, and Classification of Plant Populations. Russian J. Ecology, 2001, vol. 31, no. 1, pp. 1–5.
Zhukova L. A. The Population Life of Meadow Plants. Yoshkar-Ola, RIIN “Lanar” Publ., 1995. 224 p. (in Russian).
Zaugolnova L. B., Smirnova O. V. Age Structure of Сenopopulation of Perennial Plants and its Loudspeaker. Zhurnal Obshchei Biologii, 1978, vol. 39, no. 6, pp. 849–857 (in Russian).
Il’yina V. N. Features of Weather and Seasonal Dynamics of Ontogenetic Structure of Populations of a Hedysarum grandiflorum Pall. Rarities of Flora of the Volga Basin: Reports of Participants of the II Russian Scientific Conference. Togliatti, Kassandra Publ., 2012, pp. 109–110 (in Russian).
Il’yina V. N. Features of Structure and Dynamics of Populations of Some Plants of Steppes in the Basin of Middle Volga. Natural and Technical Science, 2013, no. 5, pp. 52–53 (in Russian).
Il’yina V. N. Determination of the Nature Protection Status of Rare Species of Plants of the Red List of the Samara Region (the second edition) on the Basis of Features of Their Ontogenesis and Population Structure. Phytodiversity of Eastern Europe, 2014, vol. VIII, no. 4, pp. 98–113 (in Russian).
Il’ina V. N. Changes in the Basic Ontogenetic Spectrum of Populations of Some Rare Plant Species in the Samara Region under Anthropogenic Load on Habitats. Samarskaya Luka: Problems of Regional and Global Ecology, 2015, vol. 24, no. 3, pp. 144–170 (in Russian).
Il’yina V. N. Types and state of the populations of the Astragalus sulcatus L. (Fabaceae) in the Samara region. Proceedings of the Orenburg State Agrarian University, 2017, no. 6, pp. 63–65 (in Russian).
Karimova O. A., Abramova L. M., Golovanov Ya. M. The Characteristic of Cenopopulation and Feature of Biology of Thermopsis schischkinii (Fabaceae) in the South Urals. Rastitelnye Resursy, 2012, vol. 48, no. 4, pp. 518–530 (in Russian).
Karimova O. A., Zhigunov O. Yu., Golovanov Ya. M., Abramova L. M. The Characteristic of Cenopopulations of Rare Mountain and Rocky Species in Trans-Urals of Bashkortostan Republic. Tomsk State University J. of Biology, 2013, no. 2, pp. 70–83 (in Russian).
Karimova O. A., Mustafina A. N., Abramov L. M. Features of the Organization of Popula-tions of a Rare Species Cephalaria uralensis (Murr.) Schrad. ex Roem. et Schult. in South Ural. Bull. of Moscow Society of Naturalists, Biological Ser., 2015, vol. 120, iss. 5, pp. 76–84 (in Russian).
Karimova O. A., Mustafina A. N., Abramov L. M. The Modern State of Natural Populations of a Rare Species of Medicago cancellata Bieb. in the Bashkortostan Republic. Tomsk State University J. of Biology, 2016 a, no. 3, pp. 43–59 (in Russian).
Karimova O. A., Mustafina A. N., Golovanov Ya. M., Abramova L. M. The age Structure of Cenopopulation of Patrinia sibirica (Valerianaceae) in South Ural. Rastitelnye Resursy, 2016 b, vol. 52, no. 1, pp. 49–65 (in Russian).
Red List of Bashkortostan Republic: Plants and Fungi. Ufa, MediaPrint Publ., 2011. Vol. 1. 384 p. (in Russian).
Red List of Samara Region. Vоl. 1. Rare View of Plants and Fungi. Samara, Izdatel'stvo Samarskoi gosudarstvennoi oblastnoi akademii (Naianovoi), 2017. 384 p. (in Russian).
Red List of Saratov Region: Fungi. Lichenes. Plants. Animals. Saratov, Izdatel'stvo Torgovo-promyshlennoi palaty, 2006. 528 p. (in Russian).
Red List of Ulyanovsk Region. Vol. 2. Plants. Ul'yanovsk, Artishok Publ., 2008. 508 p. (in Russian).
Red List of Rare and Endangered Animals and Plants, which Particularly Protected in Russia. Part 3.1. Seminal plants. Moscow, Red Data Book Laboratory of All-Russian Research Insti-tute of Nature Protection, 2004 (2005), 352 p.
Kucherov E. V., Muldashev A. A., Galeеva A. Kh. Protection of Rare Plant Species in the South Urals. Moscow, Nauka Publ., 1987. 205 p. (in Russian).
Rabotnov T. A. Vital Cycle of Perennial Grasses in Meadow Coenosis. Acta Instituti Botanici nomine V. L. Komarovii Academiae Scientiarum URSS. Ser. III. Geobotanica, 1950, iss. 6, pp. 7–204 (in Russian).
Uranov A. A. The age Spectrum of Phytocoenopopulations as Function of time and power wave Processes. Biologicheskie nauki, 1975, no. 2, pp. 7–34 (in Russian).
Flora of the European Part of the USSR. Saint Petersburg, Nauka Publ., 1978, vol. III, pp. 42 (in Russian).
Cenopopulation of Plants (Basic Concepts and Structure). Moscow, Nauka Publ., 1976, pp. 14–43 (in Russian).
Yamalov S. M., Martynenko V. B., Abramova L. M., Golub V. B., Baisheva E. Z., Bayanov A. V. Prodromus of Vegetable Communities of the Bashkortostan Republic. Ufa, Gilem Publ., 2012. 100 p. (in Russian).

стр. 3
Short text (in English): 
Full text (in Russian):