Ontogenetic Structure of Ceоnopopulations of Tulipa korolkowii Regel in Uzbekistan

Ontogenetic structure of eight coenopopulations of Tulipa korolkowii Regel were studied in Uzbekistan. Resistance mechanisms of Tulipa korolkowii coenopopulations are shown: seed and vegetative methods of self-maintenance of coenopopulations. Coenopopulations (CP) of T. korolkovii studied in normal. CP 1, 2, 6, 7,8 complete, and the rest (3, 4, 5) are incomplete, no senile individuals. Absence of old specimens in coenopopulation connected with die-off great number plants in generative period of ontogenesis

Trends in the transformation of plant ontogenesis under global climate warming

Saabunud / Received 02.05.2022 ; Aktsepteeritud / Accepted 16.07.2022 ; Avaldatud veebis / Published online 16.07.2022 ; Vastutav autor / Corresponding author: Sergey Butenko ; [email protected] of the process of ontogenesis in a group of woody plants and forest grass in the phytocenoses of the Ukrainian Polesie of Sumy region with their division into boreal and nemoral species were done. Found that in the last two decades, nemoral plant species begin vegetation earlier and pass the first phases of the ontogenetic cycle faster than boreal species. Changes in plant ontogenesis, in turn, lead to changes in the population characteristics of plant species: the number of individuals in the population, the size and configuration of the population field and the ontogenetic and vital spectra of populations changed. There has been a tendency to regular changes in the ontogenetic spectra of both nemoral and boreal plant species, but their nature was different. In nemoral plant species, the proportion of juvenile and immature individuals in the ontogenetic spectra increased and populations acquired the character of invasive, reflecting the process of progressive strengthening of their position in phytocenoses. In populations of boreal species, on the contrary, the ageing process accelerated – the proportion of old generative, senile and subsenile individuals increased

Seed productivity of Linum usitatissimum L. in different ecological conditions of Uzbekistan

The article reports influence of different environmental conditions on the productivity of Linum usitatissimum L. (flax or flaxseed) in Uzbekistan. Analyses of the plant productivity were carried out on the rainfed lands and in the conditions of the Tashkent Botanical Garden. Phenological studies revealed differences in various phases of the growing period. Morphometric parameters that determine yield of L. usitatissimum seeds under different conditions were determined. The seed yield per plant on average in the Botanical Garden was 79.4 ± 4.00, and at various regions in the rich lands such as Malguzar 76,8±4,33, Pishagar 74,2±4,54 and Khatyrchi district was 76,5±4,28. The results of the studies can be used by farms in cultivating L. usitatissimum in the Republic of Uzbekistan

Erot spatiaalisissa ja ajallisissa reaktionormeissa kevään ja syksyn fenologisille tapahtumille

For species to stay temporally tuned to their environment, they use cues such as the accumulation of degree-days. The relationships between the timing of a phenological event in a population and its environmental cue can be described by a population-level reaction norm. Variation in reaction norms along environmental gradients may either intensify the envi- ronmental effects on timing (cogradient variation) or attenu- ate the effects (countergradient variation). To resolve spatial and seasonal variation in species’ response, we use a unique dataset of 91 taxa and 178 phenological events observed across a network of 472 monitoring sites, spread across the nations of the former Soviet Union. We show that compared to local rates of advancement of phenological events with the advancement of temperature-related cues (i.e., variation within site over years), spatial variation in reaction normsPeer reviewe

Chronicles of nature calendar, a long-term and large-scale multitaxon database on phenology

We present an extensive, large-scale, long-term and multitaxon database on phenological and climatic variation, involving 506,186 observation dates acquired in 471 localities in Russian Federation, Ukraine, Uzbekistan, Belarus and Kyrgyzstan. The data cover the period 1890-2018, with 96% of the data being from 1960 onwards. The database is rich in plants, birds and climatic events, but also includes insects, amphibians, reptiles and fungi. The database includes multiple events per species, such as the onset days of leaf unfolding and leaf fall for plants, and the days for first spring and last autumn occurrences for birds. The data were acquired using standardized methods by permanent staff of national parks and nature reserves (87% of the data) and members of a phenological observation network (13% of the data). The database is valuable for exploring how species respond in their phenology to climate change. Large-scale analyses of spatial variation in phenological response can help to better predict the consequences of species and community responses to climate change.Peer reviewe

Phenological shifts of abiotic events, producers and consumers across a continent

Ongoing climate change can shift organism phenology in ways that vary depending on species, habitats and climate factors studied. To probe for large-scale patterns in associated phenological change, we use 70,709 observations from six decades of systematic monitoring across the former Union of Soviet Socialist Republics. Among 110 phenological events related to plants, birds, insects, amphibians and fungi, we find a mosaic of change, defying simple predictions of earlier springs, later autumns and stronger changes at higher latitudes and elevations. Site mean temperature emerged as a strong predictor of local phenology, but the magnitude and direction of change varied with trophic level and the relative timing of an event. Beyond temperature-associated variation, we uncover high variation among both sites and years, with some sites being characterized by disproportionately long seasons and others by short ones. Our findings emphasize concerns regarding ecosystem integrity and highlight the difficulty of predicting climate change outcomes. The authors use systematic monitoring across the former USSR to investigate phenological changes across taxa. The long-term mean temperature of a site emerged as a strong predictor of phenological change, with further imprints of trophic level, event timing, site, year and biotic interactions.Peer reviewe

Current state of local populations

Our research was carried out in the ridges of the Western Tien Shan (Uzbekistan). The study analyzed the age structure of 9 local populations (LP) of Tulipa greigii Regel. The ontogenetic structure of T. greigii local populations is represented by two types of spectrum – left-sided (LP 1, 2, 4, 5, 6, 8, 9) and centered (LP 3, 7). The studied local populations of T. greigii are normal, incomplete. It is noted that the studied local populations are young and mature. The scientific justification of the ways of ecological improvement of coenopopulation. In the implementation of scientific work, the methods of traditional geobotanical and cartographic remote study of plant formations were applied

The Main Medicinal Plants in Arid Regions of Uzbekistan and Their Traditional Use in Folk Medicine

Seventy percent of the territory of Uzbekistan consists of arid regions. This situation is considered very favorable for plants adapted to a desert climate. Medicinal plants distributed in the arid regions of Uzbekistan have not been studied much. Medicinal plants are considered inexpensive, yet are vital for the lives of local residents. They play a very important role in the traditional healing of ailments. To determine the current state of medicinal plants and enhance their subsequent protection and sustainable use, it is necessary to obtain annual information on the state of their distribution, their population size, and the impact of negative factors on their populations. Based on our field studies, which were conducted during the period from 2012 to 2022 in the arid regions of Uzbekistan, we updated the checklists of the main medicinal plants used in these regions. A total of 529 medicinal species belonging to 70 families and 269 genera were identified in the study region. Several species, including Peganum harmala L., Capparis spinosa L., Ferula foetida (Bunge) Regel, Glycyrrhiza glabra L., Alhagi pseudalhagi (M. Bieb.) Desv. ex Wangerin, Lagochilus inebrians Bunge, Xanthium strumarium L., Silybum marianum (L.) Gaertn., Onopordum acanthium L., Ziziphora tenuior L., and Cichorium intybus L., are spread over large areas and have been used regularly by the locals since ancient times. These species are common in saline and degraded soils in arid regions of Uzbekistan. Semi-structured interviews were conducted with tabibs (traditional doctors), elders, herders, and residents with experience in traditional healing using medicinal plants. The medicinal value of most plants was based on the interviews with representatives of the local population, which were useful for understanding traditional healing skills and customer service skills

Thesium longiperianthium (Santalaceae), a new replacement name for T. brevibracteatum P.C.Tam

Thesium brevibracteatum P. C. Tam was described based on the specimen Chiu L. C. 5128 collected from Inner Mongolia, China. The name Thesium brevibracteatum G. P. Sumnevich is validly published and described on the type (Korotkova E. E. et Titov V. S. 1502) collected from Uzbekistan. T. brevibracteatum P. C. Tam is a later homonym of T. brevibracteatum G. P. Sumnev.We propose T. longiperianthium as the new name for T. brevibracteatum P. C. Tam.

Thesium longiperianthium (Santalaceae), a new replacement name for T. brevibracteatum P.C.Tam

Thesium brevibracteatum P.C.Tam was described based on the specimen Chiu L.C. 5128 collected from Inner Mongolia, China. The name Thesium brevibracteatum G.P.Sumnevich is validly published and described on the type (Korotkova E.E. et Titov V.S. 1502) collected from Uzbekistan. T. brevibracteatum P.C.Tam is a later homonym of T. brevibracteatum G.P.Sumnevich.We propose T. longiperianthium as the new name for T. brevibracteatum P.C.Tam