Aim. To identify the spatial regrouping of forces in the global expert and analytical community at the beginning of the 21st century
Methodology. The research is based on the conceptual basis of social geography, the theoretical "soft power" construct. The 2008–2021 reports "Global Go To Think Tank Index Report, TTCSP” constitute the main source of factual data. Historical-geographical, comparative-geographical, cartographic methods were used.
Results. A spatial shift in the global think tank (TT) structure in favor of the global South has been revealed. Countries classification according to TTs development models is proposed. The rotation among the leading countries and the inertia of the think tanks vanguard spatial structure are revealed.
Research implications. The global structure of TT is characterized by a high level of territorial differentiation and concentration, and by a tendency towards polycentrism in development. The research materials can be useful for improving the independent expertise system of in Russia, as well as in the educational process at universities.

Aim. The study focuses on the analysis of international tourism projects in the Arctic zone of the Russian Federation from 2001 to 2024.
Methodology. The exploration of international projects was conducted using a database of the cross-border, transnational, and interregional cooperation programs of the European Union (available at https://keep.eu/). We analyzed 25 international tourism initiatives involving Russian partners located in the Arctic zone during the specified period.
Results. A differentiation among the Arctic regions of the Russian Federation was identified based on their involvement in the international tourism projects. The regions were categorized into four groups: high level (Republic of Karelia), medium level (Murmansk region), low level (Arkhangelsk region and Nenets Autonomous Okrug), and regions with no project activity (Komi Republic and Arctic regions of Siberia). Two primary types of tourism emerged as focal points for the international projects within the Arctic zone: cultural tourism and nature-oriented tourism (ecotourism). The outcomes of international projects, including the establishment and enhance ment of tourism infrastructure, development of sustainable resource management systems and the growth of educational programs in tourism, are regarded as essential for the continued development of Arctic tourism.
Research implications. The systematic compilation of international tourism projects at regional and municipal levels within the Arctic zone of the Russian Federation has been achieved. The lessons learned from the successful projects can be applied in future initiatives with both Russian stakeholders or international partners (including BRICS, the CIS and Eurasian states). Further project development should take into account the fragile Arctic environment and the potential ecological risks associated with the anthropogenic expansion.

Aim. Analysis of the distribution of twin species and comparison of chromosomal variability of malaria mosquito populations in the European part of Russia both in habitats within the steppe zone and in contrast to habitats of the zone of mixed and deciduous forests.
Methodology. 6 samples of malaria mosquito larvae in the steppe zone and 3 samples in the zone of mixed and deciduous forests were examined. The species composition of mosquitoes was determined by the structure of polytene chromosomes, as well as by the PCR-PRPD method by the composition of the second internal transcribed spacer (ITS2) rDNA. Frequencies of chromosomal inversions in populations in were evaluated An. daciae and An. messeae s. s.
Results. In the studied habitats, when moving from west to east within the steppe zone and when moving to the zone of mixed and deciduous forests, a natural change in the species composition and karyotypic structure of malaria mosquito populations occurs. The level of chromosomal polymorphism in the steppe populations of the malaria mosquito is estimated An. daciae.
Research implications. A variation in the genetic structure of populations of polymorphic species was revealed depending on changes in natural and climatic conditions in the European part of Russia (considered on the example of different parts of its steppe zone and in contrast to the western part of the zone of mixed and deciduous forests).

Aim. Assessment of the modern distribution, morphological and age structure of Siberian juniper (Juniperus sibibrica Burgsd.) thickets within in the western part of the Putorana plateau (Syukhie gory massif).
Methodology. Using the method of studying the morphological structure of woody vegetation growing at different altitudes above sea level and classical methods of dendrochronology, the age and morphological structure of 597 individuals of Siberian juniper growing at the upper limit of woody vegetation were studied. Dendrochronological samples within the upper forest boundary were selected at different absolute altitudes (from 358 to 650 m ASL) and under different exposure conditions.
Results. It is shown that, since the end of the 19th century, one of the most widespread and long-lived shrub species in the study area – Siberian juniper – has been spreading intensively under the canopy of emerging Gmelin larch (Larix gmelinii (Rupr.) Kuzen) stands. The type and rate of shrub colonisation varies according to slope exposure, tree stand density and altitude. It was found that in the study area Siberian juniper is distributed only in the zone from the upper limit of the distribution of the border of closed forests (358–515 m ASL) to the upper limit of the distribution of individual trees in the tundra (604–650 m ASL). In the studied massif of the Sukhye Mountains, Siberian juniper is distributed only on the slopes of the southern, western and eastern exposures. The observed upslope expansion of Siberian juniper is explained by changes in climatic conditions in the study area.
Research implications. The results of the study can be used to create models of climate-induced transformation of high mountain ecosystems in the Subarctic.

Aim. Study of the biodiversity of rare and protected mushrooms of the Pokrovskoye-Streshnevo natural-historical park of Moscow.
Methodology. Based on an analysis of literary and Internet sources, the 2022 edition of the Moscow Red Book and our own field research, a list of rare and protected species of mushrooms growing in the park has been compiled. Protected species are grouped into categories of rarity with a brief but succinct description of their properties. Rare species noted in the park, but not included in the Red Book, are also considered. Results of field research allowed us to expand the list of rare species of mushrooms growing in the park.
Results. Published and own unpublished field proceedings on rare and protected species of mushrooms are summarized. The ecological features of the growth of species and the threats of park reconstruction to their existence were taken into account. It has been established that a small part of rare species is represented in the Red Book of Moscow. A map of the distribution of protected mushroom species has been compiled.
Research implications. The study expands knowledge about the mycoflora of Moscow, the directions and measures of its protection and possible use.

Aim. Analysis of the history of the formation of green infrastructure in the cities of the north of Western Siberia as a factor in their sustainable development.
Methodology. The main research methods were based on the analysis of research works, urban planning documentation, reports, statistical data and other kinds of archival sources, as well as on thematic interviews taken from specialists who were directly involved in greening cities and their "ordinary" residents. In addition, the article reflected the author's direct observations of the development and use of green infrastructure in the cities of the north of Western Siberia.
Results. From the standpoint of historical geoecology, analysis of the features of the development of the urban green infrastructure of the north of Western Siberia was undertaken by means of an integrated study of natural, climatic and anthropogenic factors. Main ecosystem functions of the green infrastructure have been identified in context of the problems of sustainable development of the cities built in a subarctic climate.
Research implications. The theoretical significance of the study based on an interdisciplinary approach aimed at studying socio-environmental interactions in the process of forming the green infrastructure of cities in the north of Western Siberia. The practical significance of the study is that on its basis it is possible to create individual strategies for the development of green infrastructure, taking into account specific criteria for the sustainable development of the cities built in the natural and climatic conditions of the Subarctic.

Aim. To analyze the economic and geographical prerequisites for the optimal organization of aerobic composting as a promising method of processing organic waste in the Tyumen region.
Methods. To calculate the economic feasibility, a comparison of the costs of obtaining fertilizer volumes was performed, taking into account the current needs of the agricultural sector of the Tyumen region under different scenarios: a) the use of aerobic composting and b) the purchase of demanded types of fertilizers. To carry out a differentiated assessment of the prospects for the introduction of a composting system at the municipal level, the sums of active temperatures above 10°C and the maximum number of favorable days for the active phase of aerobic composting were compared. Considering that at average daily air temperatures above 10°C, the activation of bacterial activity in the composting process is noted, this circumstance determined the choice of this indicator as the main one for the ongoing assessment of the prospects for the introduction of a composting system.
Results. It is shown that aerobic composting is a promising area of organic waste processing for the Tyumen region. And in the context of the increasing needs of farmers for affordable fertilizers corresponding to regional soil conditions and unique peat reserves against the background of a steady increase in average temperatures, this is also the direction of providing raw materials to the agro–industrial complex. Based on a comparison of the values of the sum of active temperatures and the number of days with temperatures above 10 °C, the Tyumen Region was zoned (within the boundaries of municipalities) according to the prospects for the development of composting in the territory. It was revealed that according to the ratio of the number of days favorable for aerobic composting and the highest value of the sum of active temperatures, the best conditions for the development of composting of organic waste have developed on the territory of the Berdyuzhsky and Kazan municipal districts located in the southeastern part of the Tyumen region.
Research implications. The systematization of values for the sum of active temperatures, the number of favorable days for composting, and the dynamics of climatic indicators with a focus on municipalities within the borders of the subject of the Russian Federation was performed. The proposed approach can be used to assess territorial differentiation according to the acceptability of composting in other regions.