Tyumen Oblast Research Articles

Filaroidosis Invasion Levels in Sable and Pine Marten Populations

A comparative study of lungworm Filaroides martis invasion rates in sable and pine marten populations in the Cis-Urals region and Central Siberia was performed on the basis of samples totaling more than 3000 animals. In different sable population groups, the invasion extensiveness (prevalence) varies from 2 to 57%; in pine marten population groups, from 0 to 54%. In the Urals transgression zone, the invasion rate is statistically significantly higher in martens compared to sables. The studied groups form three clusters. Low prevalence values (less than 2%) were noted in two eastern populations: the upper Ob River (martens) and the Vakh River (sables); the highest values (over 50%), in martens in the Urals and in both species in the Uvat district, Tyumen oblast. The rest of the groups with moderate prevalence values (20–38%) form the third cluster. The invasion intensity varies from 2.5 to 3.6 helminth cysts per infected individual in sables, and from 0 to 4.6 cysts in martens; for most pairwise comparisons performed based on these two parameters, differences between samples are statistically significant. In western groups of both species, the invasion intensity is higher compared to eastern groups. In sables, invasion prevalence and intensity correlate in a statistically significant (r = 0.95; p = 0.01) way. One geographical trend was identified: in pine martens, invasion prevalence increases in a northerly direction. Cases with prevalence levels less than 5% can be explained by the absence of formed filaroidosis foci. At the beginning of the 2010s, a twofold increase in prevalence over the previous 20 years was recorded; this phenomenon has no adequate explanation yet.

Innovative-Resource Directions of Industrial Development: The Example of the South of the Tyumen Oblast

Innovative-Resource Directions of Industrial Development: The Example of the South of the Tyumen Oblast

New Records of <i>Sphaerius acaroides</i> (Coleoptera, Sphaeriusidae) from Russia Extend the Known Distribution of Myxophaga to Siberia

Abstract—А beetle species Sphaerius acaroides Waltl, 1838, widespread in Europe, Caucasus region and Iran, is here recorded from Tatarstan Republic and Tyumen Oblast (Russia) for the first time. The Tyumen record is the easternmost hitherto known and it is the first Siberian record for this species, genus, family and suborder. Molecular analysis based on the mitochondrial gene cytochrome oxidase I (COI) showed that the specimen from Tyumen Oblast, which is morphologically identical with the European specimens, undoubtedly belongs to S. acaroides. All phylogenetic reconstructions revealed S. acaroides as a well-supported clade. The analysis based on pairwise distance (p-distance) between studied samples showed the distance on the intraspecific level not exceeding 1.1%. The largest distance observed between specimens from Tyumen and north-west Germany, still shows only variability between the conspecific populations.

Влияние размещения экономических ресурсов на особенности пространственной организации России

Distribution of economic resources across Russian regions has attracted wide attention due to its significant impact on economic growth potential. Despite numerous approaches to the definition and classification of economic resources, there is no unified comprehensive methodology for assessing their spatial distribution and influence on spatial organisation of the national economy. Therefore, this article aims to study the organisation of the Russian economic space by identifying areas of resource concentration in regions, their spatial relationships and impact on socio-economic development. To this end, index and statistical methods, correlation and regression analysis, cartographic analysis are applied. In accordance with the modern strategic approach to the spatial development of Russia, the study examines the macro-regional level. Natural resources, human capital, and economic development indices were calculated in order to assess the distribution of economic resources and formation of layers (natural, social, productive) of the spatial framework of Russia. These indices are based on socio-economic indicators of Russian regions for 2010 and 2021. To determine areas of resource concentration, a correlation and regression analysis of the influence of indices as a numerical expression of layers of the spatial organisation was performed. A synthesis of the formed layers revealed the following Russian macro-regions of concentration of various economic resources and potential backbone regions of the spatial framework: Central (Moscow, Moscow and Kaluga oblasts), Ural-Siberian (Yamalo-Nenets and Khanty-Mansi Autonomous okrugs, Tyumen oblast), Central Black Earth (Voronezh and Belgorod oblasts), Northwestern (St. Petersburg, Leningrad and Murmansk oblasts). The findings can be used to identify ways to improve the organisation of the Russian economic space, increase the effectiveness of regional development policies and expand the methodology for assessing and forming other spatial layers of the economy.

Трансполярная магистраль в освоении северо-западной части Западной Сибири (к 75-летию с начала строительства)

The article is based on the materials identified in seven collections of archives of Tyumen Oblast, the use of a number of published documents, the memoirs of the prospector Aleksandr Pobozhiy. The aim of the work is to show the extremely important significance of the Transpolar Railway in various areas of territory development. In connection with this aim, the main research attention is focused on the influence of the railway, which had different names in different periods of time (Vorkuta-Salekhard, Polar Railway, Chum-Salekhard-Igarka), on the economic development of the region. The influence was manifested both during the construction period and after its completion. The author used historical genetic and historical comparative research methods. The historical genetic method was used for the analysis of the causes of the phenomena that developed during the construction period, including the reasons for the termination of the railway's construction. The historical comparative method was used for the general analysis of the processes that developed in the north of Tyumen Oblast. These processes were considered in the context of the territory's economic development. The phenomena in the Arctic zones of the region in the conditions of modern and previous stages of development were compared. The author's main conclusions are the following. The Transpolar Railway entailed a large-scale scientific study of the vast territory of Yamalo-Nenets National Okrug, caused the development of railway, aviation, sea, river transport and transport communications with the center of the country; influenced the growth of the population and its qualitative characteristics. The built telephone and telegraph line provided stable communication with different regions of the country. Regarding the reasons for the termination of the construction of the road, the author came to the conclusion that they were related to the geological features of the section connecting the right and left wings of the railway - the Nadym-Pur-Taz interfluve. The features of this site led to the need for construction conservation. Due to the peculiar political processes in the country (the consequences of Stalin's death, Beria's execution, the liquidation of the GULAG system), the construction was transferred from the conservation stage to the completion stage. The launched study of the features of the territory of the Nadym-Pur-Taz interfluve prepared the main result of the design and survey work on the railway, which consisted in the transition to its geological study. The author also came to the conclusion that, without making it public, the road was used in the geological, gas, transport, urban development of the territory of Yamalo-Nenets Okrug.

Spatial Structure of Tourism in the Context of the “Center–Periphery” Concept: The Case of Tyumen Oblast

Spatial Structure of Tourism in the Context of the “Center–Periphery” Concept: The Case of Tyumen Oblast

Metallurgical groups of non-ferrous metal products of the Baitovo Culture in the settlement of Marai 1

In the paper, the results of an analytical investigation of 28 artefacts made of non-ferrous metal originated from the materials of the settlement of Marai 1 of the Lower Ishim River basin of Tyumen Oblast are presented. Among the items were arrowheads, awls, decorations, plates, drops an ingot and a bracket attributed to the Bai-tovo Culture. The upper cultural horizon of the settlement marks the site of the Baitovo Culture of the beginning of the Early Iron Age, dated to the 4th–2nd centuries BCE. Based on the results of the spectral analysis carried out in the laboratory of nature sciences of the Institute of Archaeology, Russian Academy of Sciences, five metallurgical groups were identified. The artefacts belonging to the groups of pure copper (14 items) and dopped alloys (14 items) split evenly. Ten items are made of tin bronze. Two items belong to the tin-arsenic bronze group and one to the arsenic bronze group. The plate made of a copper-based alloy with the additions of tin, arsenic and silver represents an isolated item. A correlation was identified between the type of the artefact and the material it is made of. It was most prominent with the example of the arrowheads made of pure copper and the implements made of dopped alloys. There is a discernible continuation of the traditions of the epoch of bronze manifested in the use of both dopped alloys, as well as pure copper. For the local production, feedstock material was used, possibly supplied in ingots from the metallurgical centers of Central and Eastern Kazakhstan, which were rich in tin ore deposits. Pure copper, as well as the arrowheads (made of pure copper) were probably imported from the workshops of the Itkul Culture. The Urals metal could have also been distributed along the river system of the Tobol and Ishim onto quite far-off territories. From the 7th–5th centuries BCE, the Itkul metallurgical center was practically a monopoly supplier of copper and products for a range of the cultures (including the Baitovo Culture) of the mountain-forest and forest-steppe Trans-Urals and Western Siberia, and it was actively functioning until the 3rd century BCE. Its distinctive feature was the production of throwing weapons from pure oxidized copper. There-fore, the orientation of the historical-metallurgical relations on both western centers, as well as eastern, has been ascertained, which indicates extensive exchange-of-goods relations of the groups of the Baitovo population. However, the decrease of the supply of tin-ore alloys, as well as the decline of the Itkul metallurgical center to-wards the 3rd century BCE resulted in the search for new sources of feedstock material and expedited the transi-tion to the ironwork production.

Communal sacrifice in the ritual space of the Eastern Khanty

The communal sacrifice myr (‘all people’, ‘people gathering’) of the Eastern Khanty living in the basins of the Bolshoy Yugan, Agan, Trom’egan, Pim, Lyamin, and Demyanka Rivers (the territory of the Khanty-Mansi Autonomous Okrug and the north of Tyumen Oblast) is studied. The work is based on the field materials of the author collected in 2002–2017, as well as on other investigations and previously published sources. The aim of the paper is the study of the role of the communal sacrifice in the worldview and ritual space of the Eastern Khanty. The methodological basis of the research stems from the theoretical developments of ritual by V. Turner (1983) and gift-exchange by M. Mauss (2011). The concept of “principal ritual” by A.K. Baiburin (1993) has been used in this work. The communal sacrifice myr is the most attended by the number of participants and longest by time ritual of the Eastern Khanty. Within the myr, the most extensive interaction between the world of humans and the world of deities of the Eastern Khanty happens. The structure of the myr includes sacrificial rituals devoted to the deities of the whole pantheon of the Easten Khanty, as well as shamanistic rituals and traditional fortunetel-ling. During the myr, decisions are taken with regard to the most important problems of the community life, whose implementation requires not only human effort but also ‘divine support’. In this paper, the modern boundaries and frequency of conducting the communal sacrifice among the Eastern Khanty are identified. The social and sex-age composition of the participants in the ritual are characterized. The origins and reasons of the ritual performance are considered. In its symbolic aspect, the myr performs the functions of reloading the interrelations between the world of humans and the world of deities in the time of a crisis. Such reloading, alongside sacrifices and gifts to the gods, includes invoking the theme of the primordial genesis of the Khanty’s cosmos — a traditional ceremony of setting fire to the ritual pyre by rubbing. In the course of the research, it has been found that the communal sacrifice corresponds with the concept of gift-exchange of M. Mauss, contains the features of reciprocation, and plays the role of a principal ritual of the Eastern Khanty culture.

An experience of the experimental use-wear analysis of made of tools pottery shards (based on the materials of the fortified settlement of Marai 4)

The paper concerns the determination of the functional purpose of scraper-shaped pottery tools of the forti-fied settlement of Marai 4 of the initial period of the Early Bronze Age. The site is located in the territory of the Lower Ishim River basin in Kazan District of Tyumen Oblast. Its materials are dated to the 6th (7th) — end of the 5th centuries BCE; culture-wise, they belong to the circle of the Zhuravlevo antiquities. The collection of the pot-tery scrapers of the site amounts to 78 items. Initially, the majority of them were interpreted as scrapers for fle-shing. However, a series of features gave rise to doubts, and the problem of the functional purpose of the scraper-like implements from Maray 4 remained open. In order to elaborate and correct the conclusions, in 2019–2022 the author conducted experiments on the use of pottery shards in the process of skin treatment, wood scraping, abrasive treatment of copper and bronze, in pottery making — at the stage of smoothing, compacting and sleeking the walls of pottery containers. The purpose of this paper is to present the results of the experimen-tal use-wear study of the scraper-like pottery artefacts from the Early Iron Age sites of Maray 4. The investigation is based upon the use of the experimental use-wear method, which involves the study of the traces of wear on the surface of implements, and their functional attribution. The use-wear analysis and microphotography of the traces of wear were carried out with the aid of a pancratic microscope MC-2 Z00M with a magnification from 10× to 40× with a Canon EOS-1100 camera. The performed studies allowed refining the previously conjectured hypothesis on the functional purpose of the scraper-shaped tools from Maray 4 and reaching the conclusion that most of them were used for smoothing and compacting the surface of pottery vessels. This conclusion is supported by the preliminary view of V.V. Ilyushina based upon the comparison of available reference experimental samples of surface treatment of clay vessels with pottery tools with the vessels from the site.

Relationship of economic growth and the level of human capital development: A regional aspect

Subject. In conditions of uncertainty, human capital becomes the main factor of labor productivity and economic growth. The article considers relationships between the efficiency of the economy and the level of human capital development of subjects of the Ural Federal District. Objectives. The purpose is to assess the impact of human capital on the economic growth of subjects of the Ural Federal District through indicators of gross regional product, income indices, longevity, health, and education. Methods. The study employs econometric, correlation and regression, statistical, and logical analysis. Results. We assessed the influence of various variables of human capital on economic growth, analyzed the statistical significance of the results, revealed a gap between the subjects of the Ural Federal District. Conclusions. Human capital has a positive impact on economic growth in terms of competitiveness and job creation. The obtained multiple regression equations are generally positive, indicating a positive trend in the influence of human capital on economic growth. The components of human capital have become the most significant factors, determining the pace of economic growth in the Tyumen Oblast and the Khanty-Mansi Autonomous Okrug. They do not have a specific impact on the Yamalo-Nenets Autonomous Okrug.

Estimation of the input-output balance model for the South of the Tyumen Oblast

Subject. Monitoring and predicting the trajectories of the development of regions on the basis of the Leontief balance model. Objectives. Development of the balance tables estimating schemes for the south of the Tyumen Oblast according to statistical data of typical economic indicators. Methods. Two options for solving the problem of estimating balance tables are considered. In the first variant the reference matrix of direct costs is adjusted to the statistical data of the system of national accounts for the Tyumen Oblast. The second variant is to use the industry cost structure for Russia to customize the regional table. Results. In the first approximation, the structure of aggregation of industries into subsystems was chosen in accordance with the development strategy of the Tyumen Oblast until 2030. The obtained images of the tables correspond to the balance ratios and productivity conditions of the Leontief matrix. Conclusions. The results of adjusting the input-output model for the south of the Tyumen Oblast according to the available statistical data in general demonstrate the efficiency of the presented methods for assessing direct cost matrices. The choice of the structure of aggregation of indicators in accordance with the development strategy of the region allows to compare the predicted and model trajectories of economic development for characteristic groups of industries.

The Oil Industry in the South of Tyumen Oblast: Enclaves or Clusters?

The Oil Industry in the South of Tyumen Oblast: Enclaves or Clusters?

Relationship of depressive disorders with hypertension, its control and other metabolic risk factors in the Tyumen Oblast population of men and women. Data from the study “Epidemiology of Cardiovascular Diseases and their Risk Factors in Regions of Russian Federation” (ESSE-RF)

Aim. To study the association between depression and metabolic cardiovascular risk factors, hypertension (HTN) and its control in a random sample of Tyumen Oblast population of men and women aged 25-64 years.Material and methods. The study object was a random sample of the population of the Tyumen and the Tyumen Oblast aged 25-64 years, examined as part of the ESSE-RF epidemiological study. The study included 1658 participants. Among them, 30,3% (n=503) were men, while 69,7% (n=1155) — women. Mean age was 48,9±11,4 years. The prevalence of metabolic risk factors (hyperlipidemia, carbohydrate metabolism disorder, obesity), hypertension and the likelihood of its control in men and women with different levels of depressive disorders diagnosed using the HADS scale were assessed.Results. Compared with participants without depression, persons with psychological disorders were significantly more likely to have HTN (55,5% vs 47,6%, p<0,01), elevated levels of total cholesterol (TC) (63,9% vs 54,0%, p<0,01) and low-density lipoproteins (LDL) (66,7% vs 60,3%, p<0,05), carbohydrate metabolism disorders (8,3% vs 5,2% p<0,05), obesity (49,2% vs 37,7%, p<0,01). Significantly more often hypertensive subjects without depression took antihypertensive drugs effectively (odds ratio (OR) — 1,747, 95% confidence interval (CI), 1,001-3,053) and controlled blood pressure (OR — 1,533, 95% CI, 1,05-2,36). There was no association between the use of antihypertensives and the level of depressive disorders. Among women with depression (HADS>7), dyslipidemia (65,5% vs 57,4% for TC, p<0,05; 71,0% vs 62,9% for LDL, p<0,05), carbohydrate metabolism disorders (10,1% vs 5,2%, p<0,01), obesity (53,3% vs 43,2%, p<0,01), HTN (60,6% vs 45,6%, p<0,01) were more common. Men with clinical depression were more likely to have HTN (69,0% vs 47,7%, p<0,05), with a high level of depression — hyperlipidemia (58,9% vs 46,7% for TC, p<0,05; 67,1% vs 53,9% for LDL, p<0,05). Women with elevated depression levels were less likely to take antihypertensive drugs (30% vs 49,4%, p<0,01) and control hypertension (13,8% vs 21,2%, p<0,05).Conclusion. The data obtained confirm the association of depressive disorders with metabolic risk factors and the likelihood of HTN control, which is especially significant among women.

Flora and Vegetation of the Aleksandrovskiy Wildlife Area (Tyumen Oblast, Vikulovo District)

The Aleksandrovskiy wildlife area (95830.2 ha) reserved for a sanctuary is located in sub-taiga of the western part of Vikulovo District, Tyumen Oblast. A complete floral survey of the area is unattainable at present because it is a vast wetland with very few roads. The study is aimed at evaluating the current state of local flora and vegetation, and identifying plants and plant communities that require protection. Main types of phytocenoses in the Aleksandrovskiy wildlife area were described, which include small-leaved, light-coniferous and broad-leaved forests, willow coppices, cereal-forb dry meadows, sedge-reed floodplain meadows mixed with halophyte communities, pine-subshrub-sphagnum raised bogs (riams), and semi-aquatic vegetation. Birch, aspen and aspen-birch bracken, forb and cereal-forb meadows predominate in the surveyed area. The floral diversity of the site amounts to 410 species of vascular plants, with 80 found in Vikulovo District for the first time. New sites for 10 vascular plants, one moss and one lichen species included in Red Data Book of Tyumen Oblast were found, among them Cypripedium calceolus L., Lobaria pulmonaria (L.) Hoffm. included in Red Data Book of the Russian Federation. Fourteen species which are relatively rare in Tyumen Oblast were registered. All found species were described with a reference to their habitats, geographical coordinates of the collection sites and the date of collection. Additionally, the Red Data Book species description included their rarity status and the condition of the coenopopulations. The results allow to define the species distribution areas in Transuralia

Резкое падение численности кудрявого пеликана Pelecanus crispus (Aves: Pelecaniformes) на Урале и в Западной Сибири в 2021 г.

The Dalmatian pelican Pelecanus crispus (Bruch, 1832) is a globally rare species. Its extremely local ("point") placement during the nesting period on a few hard-to-reach water bodies distanced far from one another makes it a highly vulnerable species. In the end of the 20th century, the number of the species in Chelyabinsk, Kurgan and Tyumen oblasts steadily grew. This was largely due to the redistribution of individuals from drying reservoirs of the more southern parts of the breeding range to the northern ones against the background of global climate warming. Thus, pelicans stopped nesting in the Svetlinsky Reserve (Orenburg oblast) due to the drought. In the spring and summer of 2021, the first mass deaths of these birds occurred in the history of study in the Urals and Western Siberia. During the observations of seven colonies in Chelyabinsk, Kurgan and Tyumen oblasts using the DJI Mavic-2 Zoom drone, we found that many individuals did not return to the breeding grounds in the spring after wintering, and another part died at the height of the breeding season. As a result, the number of pelicans decreased by 70-80% in some colonies; in others, the proportion of dead birds was less, and some separate colonies were almost not affected at all. At the same time, in the western part of the study area (Chelyabinsk oblast), a significant part of the individuals died outside the breeding grounds, whereas in the eastern part, the birds died mainly in the breeding grounds and at a later time. In Kurgan oblast, the death of birds was noted in May, in Tyumen oblast it was in June. The total number of pelicans in the study area decreased from 1.2-1.4 thousand pairs to about 600 pairs (see the table). Six colonies were preserved; most of them now number 30-50 breeding pairs at best. However, in the study area, the largest colony (and the easternmost in the Okunevo Reserve (Tyumen oblast)) survived almost completely with about 400 pairs of pelicans continuing to breed. No more than 30 individuals died there, and this happened later than in other colonies, in July 2021. The main version of the cause of birds’ mass death is the epizootic of avian influenza which was tested in all samples (n = 5) taken from a colony in Tyumen oblast. Pelicans live in dense flocks all year round, and this could really contribute to the rapid spread of the infection. The facts of the birds’ death in various nesting sites located on a large territory, at a great distance from one another, make it seem that they contracted the virus in wintering areas. However, a number of questions remain unanswered. In particular, it is unclear how the infected birds were able to travel thousands of kilometers to their breeding grounds, why individuals of only one particular species died, why only adults died, and why they died at different times. Maybe, the avian influenza virus tested in the birds’ bodies was low-pathogenic and was not the cause of their death, but it was due to some other factor, such as food poisoning. It might be that the immunity of the birds was weakened by the abnormal heat that came to the study area since mid-May 2021. If the birds died from a highly pathogenic virus, it is unclear why this did not happen immediately after infection (in the wintering areas), but in a long time, at least from May to July. Moreover, the infection with the virus did not prevent the birds from arriving at breeding sites, building nests, laying eggs and starting to incubate. However, influenza viruses are very diverse and continue to evolve rapidly changing their properties and increasing resistance to the environment. Our understanding of the ecological factors favoring emergence and sustainability of these viruses is still limited. More efforts should certainly be made to save such a globally rare species as the Dalmatian pelican. At the moment, a large breeding colony on the territory of Western Siberia (on Tundrovo Lake in the Okunevo Reserve (Tyumen oblast)) remains the main breeding ground of the species in this area. Therefore, the importance of preserving this breeding colony comes to the fore. The article contains 1 Table, 42 References. The Author declares no conflict of interest.

Territorial nature protection system of Siberia and Mongolia

The large territory, including Mongolia and Russian Siberia, discussed in the article, has similarities in physical, geographical, and socio-demographic parameters, as well as the attitude to them as "resource colonies". But these Siberian and Mongolian components differ significantly politically, which affects their institutional and managerial characteristics, which in turn affects the process of forming the structure of territorial nature protection. The article analyses the existing systems of protected areas in Siberia and Mongolia, their structure, and legislative bases. In this study, Siberia is considered within the boundaries of the natural geographic territory between the Urals and the Far East and includes 14 regions of Russia. Of these, the Siberian Federal District includes the Altai Republic, Altai Krai, Irkutsk Oblast, Kemerovo Oblast, Krasnoyarsk Krai, Novosibirsk Oblast, Omsk Oblast, Tomsk Oblast, Tuva Republic, Khakassia Republic. The Far Eastern Federal District includes the Buryatia Republic, the Trans-Baikal Krai, Sakha (Yakutia) Republic; the Tyumen Oblast is located in the Ural Federal District.

Landscape diversity of the forest-steppe in the Tyumen Oblast (Russia)

Forest-steppe landscapes are ecotonic systems that are characterized by a high degree of diversity due to the combination of zonal forest and steppe landscapes, as well as swamps and meadows. The research is based on a comprehensive analysis of literary sources, topographic and thematic maps, satellite images, as well as field expeditions of 1997–2020. In the south-western part of the Tyumen Oblast, 12 types of terrain are differentiated on an area of 30,000 km2, including types of terrain of divides, ridges, flat ridges, flat depressions, hillock depressions, terraces, slopes, lakes and swamps, reed swamps, ravines and girders, floodplains of large rivers, small valleys. The main features of the spatial organization of landscapes in the region and the landscape structure at the level of components are characterized. In the conditions of the region, the main part of landscapes is convenient for economic development and used in various sectors of the economy. Meadow and steppe landscapes, and partly forests are plowed. Pastures and hayfields are widespread on the territory. Such economic activities as sand and peat extraction, wood harvesting, recreational nature use, as well as fishing, hunting, and gathering have been developed. Some landscapes are protected by state as nature reserves.

A computational scheme to estimate the Leontief model matrix coefficients according to input-output table data for the southern regions of the Tyumen Oblast

Subject. This article deals with the control and management aspects of regional development on the basis of Leontief’s balance model. Objectives. The article aims to develop schemes for stable estimation of aggregate parameters of region balance models based on a shortened sample of input-output statistical data and rules for their subsequent regularization. Methods. For the study, we used multiple forms of regional economic balance model transformation based on the aggregation of data of the selected regional subsystems. Results. The primary estimates of aggregate input-output matrix for the southern regions of the Tyumen Oblast were obtained from the statistical input-output data for 2014–2018. To comply with the productivity conditions, additional information was introduced into the estimation algorithm reflecting the balance dependence for the reference input-output matrix for the Russian Federation and for the southern regions of the Tyumen Oblast in retrospective (2004–2013). Conclusions. The result of regularization of aggregate input-output matrix for the southern regions of the Tyumen Oblast obtained from the statistical input-output data on the basis of the least squares method indicates that the backward estimation technique cannot act as a basic tool for the primary construction of balance models of regional economies. However, backward estimation algorithms with subsequent regularization are effective in correcting the reference input-output matrix using actual data of the region’s socio-economic development.

Assessment of Plant Biodiversity around the Tobolsk Industrial Site

The article presents the results of comprehensive studies of the plant biodiversity near the industrial zone of the city of Tobolsk, Tyumen Oblast, Russia. Nine species of formation communities were identified: Abies sibirica Ledeb, Pineta (sylvestris), Betuleta (pendula), Betuleta (pubescens), Tilieta (cordata), Populeta (tremula), Saliceta, Prata, Emersiherbosa. Also, eleven associations were identified for the studied communities: fir forest with sedges, linden and birch; mixed small-leaved dark coniferous forest with sedges; low-shrub sphagnum pine forest; steppe birch forest; swampy low-shrub sphagnum birch forest; swampy reedgrass birch forest; linden-birch forest; cereal-horsetail-fern aspen forest; aspen forest with grass layer; aspen forest mixed with birch and sedges; mixed birch-aspen forb forest; maturing aspen-birch forest with hygrophilous grasses.

Микротопонимы д. Янтык Тюменского района Тюменской области

The paper presents the microtoponymy of the village of Yantyk located in the Tyumensky District of Tyumen Oblast. The purpose of the study is to describe the system of microtoponyms of the village of Yantyk located in the Tyumensky District of Tyumen Oblast. Scientific novelty of the study lies in conducting a comprehensive analysis of the microtoponymic system of the settlement. In order to identify the origin of the naming units, the researchers used historical and local lore data, as well as the accounts of the local population clarifying the motivation of the names, which were collected during field research as a part of a comprehensive expedition undertaken by G. Ibragimov Institute of Language, Literature and Art, Tatarstan Academy of Sciences. As a result, it has been proved that the microtoponymy of the village of Yantyk located in the Tyumensky District of Tyumen Oblast reflects both microtoponymic naming units characteristic of the Tatar (Turkic) onomastic system and local semantic, structural and motivational features.