Том 27, № 3 (2024)

The work deals with investigation of the oscillation synchronization in a system of three populations, migration – related in a ring. The dynamics model represents a system of three identical logistic dissipatively interconnected mappings. The author has constructed a complete phase portrait of the model using qualitative methods of dynamic systems study. It is shown that there are several periodic points in the phase space, corresponding to synchronous and asynchronous cycles.

Using remote sensing data, the authors have carried out the NDVI assessment of dark coniferous forests in the Lower Amur region. The forests NDVI increases when moving from the northwest and east of the region to its central part, from north to south, and with decreasing altitude. Minimum NDVI values (0.437–0.719) are typical for the northwestern part of the region, maximum (0.743–0.849) – the southern, medium (0.719–0.743) – the eastern, medium and high (0.719–0.768) – the central, high (0.743–0.768) – the western ones.

The article provides information about the types of oak forests, their species richness and distribution in the Bastak state nature reserve. The greatest floral diversity is characteristic of lowland shrub-forb oak forests. An ecological analysis of the oak forests flora is given in relation to moisture. Mesophytes dominate in flora of various oak forests types.

The results of a study of mercury content in the muscle tissue of five species of fish caught in the Amur River are presented. The detected concentrations did not exceed the maximum permissible limits established by TR CU 021/2011. However, for some specimens the mercury concentration approached the maximum, which suggested that there was a risk of mercury accumulation in the body of fish above the MPC over the next few years of life under constant conditions.

The northern fur seal (Callorhin usursinus), inhabiting North Pacific, has long been a valuable commercial target. This work continues a series of studies aimed at analyzing the dynamics and reproductive characteristics of the northern fur seal population on the Tyuleniy Island. The paper provides analyzes of intrapopulation parameters influence on the population sex ratio and pups production.

The prospects of oil and gas potential of Paleogene deposits of the Sanjiang-Middle Amur sedimentary basin based on one-dimensional digital models have been assessed. The results obtained indicate that the formation of first-generation gas is predicted in both the Birofelsky and Preobrazhenovsky graben from a depth of about 1000–1300 m. The main sources of hydrocarbon generation are the deposits of the Lower Chernorechenskaya formation and the Paleocene complex. The most promising for the generation of liquid hydrocarbons is the Preobrazhenovsky graben, where oil generation is currently predicted from a depth of about 2000–2500 m.

The lithochemical characteristics of the Late Mesozoic fine-grained terrigenous rocks of the Ussuri-Amur interfluve is described. The paleoclimate of the demolition areas has been reconstructed.

The Magloy massif is part of the Anajakan ore zone, in which, according to the results of early studies, gold-quartz, gold-sulfide and copper-porphyry types of mineralization are widely represented. Porphyry copper deposits are associated with rocks of the magnetite series (oxidizing conditions). This work shows the connection between the redox conditions of the Magloy massif granitoids formation and its ore specialization.

The regularities of the structure and gas content of the Yilan-Itong segment of the Tan-Lu Fault Zone are considered on the example of grabens of the Fangzheng – Birofeld link. Their structure has a lot in common, since they were formed in a single geodynamic environment. However, each structure has its own individual characteristics.

It is considered the influence of catastrophic fires on nitrates content in taiga rivers water in 1998. Their long-term flow into the river network is shown by the authors.

The authors brought into the system the problems of urban public spaces creation on the example of the Khabarovsk Town urban district. The research results can be used by public authorities and local self-government institutes for the development and updating of strategic urban planning policies.

Solid phase extraction (SPE) and gas chromatography-mass spectrometry (GC-MS) are a well-known tandem of highly sensitive methods for the determination of trace organic contaminants in natural waters. However, in their application, the researcher may encounter a number of problems that affect the final result. In this paper, the problems of using SPE and GC-MS for the analysis of organic matter (OM) in natural waters are discussed and solutions are proposed.

The article considers zone, located within the boundaries of the Irkutsk-2 micro district, with special conditions for territory use (ZSCUT). The authors carried out the analysis of such zones impact on ecological situation and prospects for that territory development. Special attention is paid to the integrated development of the territory, i.e. the built-up areas development as a way to ensure balanced and sustainable development of the neighborhood.

This article is devoted to one of the most important and pressing problems of the modern Russian state – economic security. Sanctions, imposed by a number of states due to Russia’s foreign policy activities, have a serious impact on the economic sphere of Russia in general and on the Far East in particular. The paper examines the political aspects of this problem, including the reaction to sanctions by the Russian authorities, the search for alternative partners and markets, as well as the impact of sanctions on the economic development of the region. The study includes the analysis of measures taken by the Russian authorities to strengthen the economic security of the Far East in the context of sanctions, such as stimulating domestic production, developing interregional cooperation and searching for new investment opportunities. Attention is also drawn to the importance of political stability and diplomatic efforts to overcome the economic challenges associated with sanctions. The work aims to identify key factors influencing the economic security of the Russian Far East. The work reflects both theoretical aspects, in particular, the theoretical construct «economic security» in the works of Russian researchers, including domestic legal field, and also practical issues – in particular, the sanctions of Japan and the Republic of Korea against Russia and their impact on the Russian Far East. Particular attention is paid to the changes that have occurred within the framework of bilateral interaction with North Korea, as well as the intensification of economic cooperation with China. The author identifies the main reference points in matters of economic security that need to be taken into account when planning and implementing economic policy in a regional context.