Abstract Original data on the ecological relations of Sifonoptera fleas with small and medium-sized predators in southwestern Primorskii krai are presented. The parasitic community of fleas in populations of predatory mammals of the studied territory consists of eight species belonging to three families and five genera. Five flea species—Chaetopsulla appropinquans, Ch. micado, Ch. zibellina, Ch. dogieli

Abstract Data characterizing the gypsy moth Lymantria dispar population in the eruptive phase in the Far East territory in 2008 are presented. The death of insects based on biotic factors (parasitoids and nuclear polyhedrosis virus) has been studied; the sex ratio, weights of male and female pupae, and female fecundity have been determined. It is shown that nucleopolyhedrovirus is the main cause of

Abstract Differences between factory and wild juvenile salmons (fingerlings at the 0+ age and 1+ parrs) in the content of physiologically significant fatty acids and their ratios are shown. Factory juveniles (age 0+ and 1+) have a very low content of physiologically significant 18:3n-3 and 20:4n-6 fatty acids when compared with wild individuals, whereas relatively high amounts of 22:6n-3 (age 0+) and

Abstract This review summarizes and analyzes data on the threespine stickleback Gasterosteus aculeatus L. of the White Sea, which is currently the most abundant fish in the region and, therefore, plays an important role in inshore and offshore communities. The threespine stickleback was abundant in the 1920s–1940s; its numbers declined significantly between the late 1960s and late 1990s and have increased

Abstract— The development of principles and methods for restoring ecological systems that have undergone intense anthropogenic impacts is one of the most important tasks of modern ecology. This work is devoted to studying the regularities of the influence of organic pollution on the structure and functional characteristics of zoobenthic communities and the degree of restoration of the pristine communities

Abstract Mollusks from the Viviparidae family are one of the invertebrates that actively settle outside their natural habitats. Alien representatives of this family dwell in the waters of North and South America, Europe, and Asia. This paper presents the results of long-term studies of Viviparus viviparus L. unintentionally introduced into the Novosibirsk Reservoir. The effect of types and concentrations

Abstract Our study has been conducted along the coastline of the eastern Gulf of Finland for three years. It had been shown that accumulation of algal biomass caused by the “green tide” events significantly influenced the metal distribution in the surface sediments. Metal concentrations differed significantly under algal mats and at the sites, which were free of algae. Our study showed significant

Abstract Distribution areas of European and rainbow smelts overlap in the northeastern part of Europe. The interrelations of the two species are poorly researched in this zone. This article describes the identification of a European smelt discovered on the shore of Lake Krivoe, Kolguyev Island, Barents Sea, near the waterline, together with other fishes whose cause of death is unknown. The species

Abstract— The climate change that has taken place in recent decades has significantly increased the threat of the occurrence and distribution of wildfires in northwestern Siberia. However, little is known about the spatial and temporal patterns of fires and their relationship with climate and vegetation in this area. As a result of processing Landsat satellite images for 1985–2017, it was determined

Abstract Population demography parameters of common small mammals have been obtained using two different census methods and intercompared. Resident population density and nonresident activity parameters were obtained on live-trap lines using the capture–mark–recapture method. Abundance parameters were obtained on break-back trap lines using the permanent removal (PR) method. Censuses performed using

Abstract This work considers the dynamics of vegetation indices and surface temperature of postfire areas of different ages in larch forests of the permafrost zone of Siberia obtained using long-term Terra/MODIS satellite imagery. Landsat/ETM and OLI satellite images were preliminarily classified to analyze the degree of pyrogenic disturbance in the sample of postfire sites. An increase in the average

Abstract This article addresses the phytocoenotic diversity of psammophytic grass communities in the southern part of the nonchernozem zone of Russia, where the restoration of Scots pine (Pinus sylvestris) is either ongoing or potentially possible. Community structure and composition formation trends developing under the influence of key environmental and coenotic factors have been identified. The

Abstract Conifer decline (Abies sibirica Ledeb. stands) as a result of complex biotic effects on the territory of Krasnoyarsk krai by 2018 reached an area of 541 400 ha; the potential area of further death of A. sibirica is up to 10 million ha. The main reason is the phytopathogenic fungi Armillaria mellea s.l. and Heterobasidion annosum s.l. combined with bark beetle Polygraphus proximus. Trees affected

Abstract A distinctive paleogeographic situation in the southern part of the Vitim Plateau, Transbaikal region, has resulted in the formation of landscapes featuring numerous heaving mounds and thermokarst depressions. The cryolithozone reacts to climate warming by reducing its area, while the temperature and depth of seasonal permafrost thawing are increasing. A soil profile differentiation identified

Abstract The structure of Thymus petraeus individuals has been studied architecturally. It has been established that in the south of Siberia the species occurs in similar habitats: in true, meadow, sandy steppes and their petrophytic variants on the slopes and low rocky peaks of hills. According to the classification proposed by I.G. Serebryakov (1964), T. petraeus is a vegetatively semimobile dwarf

Abstract A study of the horizontal and vertical distribution of phytoplankton in Lake Sevan was conducted in mid-July 2018 during the maximum Cyanoprokaryota blooms. The summer biomass of algae in the pelagic zone of the lake corresponded to values of mesatrophic waters. The Cyanoprokaryota biomass in Lake Sevan has horizontal and vertical heterogeneity and is related to the depth, morphometry of the

Abstract In the Baikal region, warming under conditions of climate continentality is accompanied by an increase in the area of forest fires and the risk that postpyrogenic ecosystems will not return as forests. A study of pine forests on sand sediments in the southeastern Baikal region showed that the regional ecosystems damaged by fire develop in different directions depending on the type of fire

Abstract The primary successions of vegetation have been investigated in the continental conditions of the Severo-Chuiskiy center of present-day glaciation (Central Altai) from the colonization of deglaciated terrains by the first plants to the formation of simple plant groups to the primary plant communities. The observations were carried out for 15 years on the young moraines of the valley glaciers

Abstract The results of a study of the dynamics of elements of seed productivity amphimict Hierochloe repens (Host) Beauv. (2n = 28) and the optional apomict Hierochloe odorata (L.) Beauv. (2n = 42) (Poaceae) are presented. The plants were grown in the absence of competition and in single-species artificial cenoses with low (5 plants/m2) and high (20 plants/m2) starting density. It is found that, according

Abstract The structure of flora and fauna, which is a standard of the state and dynamics of the taiga forests in humid climatic facies of the Altai-Sayan mountain region, has been analyzed based on the example of the undisturbed mountain Siberian Pine taiga (Eastern Sayan mountains). The ecological–phytocenotic features and floristic and faunistic composition of the late succession stage are studied