Comparative assessment of Western Podolia meadow steppes (Ukraine) based on the synphytoindication method

The aim of our study is to establish the determinant ecological factors that have the greatest differential impact on the distribution of meadow steppe plant communities of Western Podolia (Ukraine) on the base of a synphytoindication analysis. There were 8 study sites within the study area in the L’viv and Ivano-Frankivsk regions. To determine the coenotic affinity of the studied species, 48 relevés were analyzed. Numerical classification based on the Modified TWINSPAN algorithm divided the dataset into five clusters, which have been identified as the associations Pastinaco sativae-Arrhenatheretum elatioris, Geranio sanguinei-Trifolietum alpestris, Inuletum ensifoliae, Jurineo calcareae-Stipetum capillatae and Lembotropio nigricans-Potentilletum arenariae. The results of gradient analyses indicate that the distribution of meadow steppe communities in the Podolia Upland closely correlates with a number of climatic (thermoregime and continentality of climate) and especially edaphic (soil humidity, soil acidity and carbonate content) ecological factors.

ONTOGENETIC STRUCTURE AND ASSESSMENT OF POPULATIONS OF THYMUS KRYLOVII BYCZENNIKOVA IN MINUSA DISTRICT OF THE KRASNOYARSK TERRITORY

The article presents the results of the study of ontogenetic structure and assessment of the state of coenopopulations of Thymus krylovii Byczennikova in steppe plant communities of Minusinsk district of Krasnoyarsk region. It was found that the ratio of individuals of different ontogenetic groups studied coenopopopulations normal, also incomplete. Ontogenetic spectra of the studied right-hand type cenopopulations with a maximum on individuals in the old generative ontogenetic state. According to the "Delta-omega" classification, the studied cenopopulations are aging. The obtained results on the developmental biology, ontogenetic structure and values of the main demographic indicators characterize the coenopopulations of Thymus krylovii Byczennikova as unstable. To evaluate the stability of populations in the study region. It is shown that their optimal state is achieved in these fine-grained steppes. Optimum is achieved mainly due to population characteristics.

Биоморфологическая структура флоры государственного природного заказника «Реликтовые дубы» (Забайкальский край)

<p>In this paper, we use Serebyakov's life-form classification to analyze the biomorphological structure of flora growing in Relic Oaks State Reserve (Trans-Baikal Territory). The reserve is located on the territory of Eastern Siberia that belongs to the Pacific Basin. In accordance with the established biogeographical division, this territory is at the boundary between two large floral regions of the Holarctic: Circumboreal and East Asian. It is notable for its phytodiversity and classified as a region with the dominating taiga, taiga-forest-steppe, and forest-steppe plant communities. The biomorphological analysis has shown the predominance of herbaceous plants over xylophytes in the flora of the reserve. Plants with fully or partially lignified shoots account for 11.8% and herbaceous plants, for 88.2% of the total number of flora species in the reserve. Shrubs are the dominating xylophytes on the territory of the reserve and dry-land polycarpous plants are the prevailing herbs. The Relic Oaks Reserve location at the boundary between the forest-steppe and steppe zones causes the predominance of short-rooted, long-rooted, and taproot herbaceous plants. </p>

PLANT COMMUNITIES WITH GLOBULARIA PUNCTATA LAPEYR. IN SAMARA REGION

This article contains information about scientific research conducted steppe plant communities with Globularia punctata Lapeyr. in the Samara region. Given their ecological and phytotsenotichesky characteristics, geobotanical descriptions and geographical coordinates. Based on the research concludes that Globularia punctata Lapeyr. part of the Stipa lessingiana + Festuca valesiaca, Festuca valesiaca + Stipa pennata, Festuca valesiaca + Stipa pulcherrima and Herbae stepposae + Festuca valesiaca communities meadow steppe zone, where it presented a significant number of the population of individuals is in a stable condition, with well-defined developmental structure. In total, the communities with Globularia punctata Lapeyr. recorded 120 species of vascular plants, of which 21 (17,5%) are rare and are included in the Red Book of Samara Region (2007): Stipa pulcherrima K. Koch, Stipa pennata L., Hedysarum grandiflorum Pall., Hedysarum razoumowianum Fisch. Helm ex DC., Eremogone koriniaya (Fisch. ex Fenzl) Ikonn., Astragalus zingeri Korsh., Oxytropis floribunda (Pall.) DC., Scabiosa isetensis L., Ephedra distachya L., Alyssum lenense Adams, Adonis wolgensis DC., Silene baschkirorum Janisch., Jurinea ewersmannii Bunge, Aster alpinus L., Polygala sibirica L., Cotoneaster melanocarpus Fisch. ex Blytt, Iris pumila L., Galatella angustissima (Tausch) Novopokr., Linum flavum L., Campanula wolgensis P.A. Smirn. and Globularia punctate Lapeyr. The data obtained are recommended for use in the 2-nd edition of the Red Book of Samara region, community participation Globularia punctata Lapeyr. - for inclusion in the Green Paper of the Samara region, and described the territory - to select based on these natural monuments of regional significance.