In Belarus, game species population management principles are based on determining the optimal species abundance in a specific area, established by game management, based on habitat quality assessments and species abundance, obtained through various surveys. The quality and capacity of wild animal habitats are highly dynamic. Currently, a scientifically sound and accurate method for assessing them does not exist. To improve game species management, it is proposed to introduce adaptive management principles. Indicators that can be used to assess population status and their negative impact on human activities are described. A system for collecting and analyzing indicators is substantiated for government agencies to support their decision-making in nature management related to hunting.

This study presents current and predicted probabilistic assessments of the suitability of the Polessky State Radio ecological Reserve (PSRR) territory for the introduction of invasive woody plant species – Acer negundo and Robinia pseudoacacia. The maximum entropy (MaxEnt) approach was used, incorporating information on habitats and environmental conditions, identifying the most significant factors for the spread of each species. It was determined that favorable conditions for the growth of A. negundo currently exist on 31.53 kha (14.7 % of the PSRR area), while favorable conditions for R. pseudoacacia are found on 33.6 kha (15.7 %). The predicted probability of species spread is based on SSP climate change scenarios, which revealed that only for R. pseudoacacia under SSP1-2.6, by the end of the 21st century, there will be an increase in area (39.52 kha, or 18.5 %) with favorable growing conditions. In all other cases, a reduction in areas suitable for the formation of communities with invasive woody plant species is predicted: for A. negundo – from 17.15 kha (8.0 % of the PSRR area) to 0,04 kha (< 0.1 %), R. pseudoacacia – from 10.45 kha (4.9 %) to 2.79 kha (1.4 %).

The seasonal dynamics of phytoplankton communities in lakes of varying trophic status in the Belarusian Lake District are examined. Sixty-six samples, collected from 11 lakes between May and September 2023–2025, served as the material for analysis. The study focused on phytoplankton from lakes of varying trophic status in the Belarusian Lake District. Multivariate statistical methods (cluster analysis and non-metric multidimensional scaling (NMDS) based on Bray–Curtis distances) were used to assess differences between communities and to visualize the data. It is shown that the nature of seasonal dynamics and the degree of similarity of phytoplankton communities significantly depend on the trophic state of the water bodies. Mesotrophic lakes with oligotrophic features are characterized by the greatest stability and high similarity between communities in all seasons. Mesotrophic lakes occupy a transitional position, demonstrating maximum similarity to less trophic systems in spring and the greatest differences in late summer. Eutrophic lakes are most similar in the summer, during the period of maximum productivity. Hypereutrophic lakes exhibit the greatest seasonal variability and minimal similarity to other lake types, especially in late summer. NMDS ordination showed that the seasonal effect increases with increasing lake trophic status. Summer and late summer phytoplankton communities were the most distinct, while spring communities were characterized by greater similarity between different trophic statuses.

This paper presents the findings of a comparative study conducted in the southern agroclimatic zone of Belarus during the 2023 and 2025 growing seasons. These seasons differed in terms of hydrometeorological conditions. The study examined the biochemical composition of the fruits of five newly introduced blue honeysuckle varieties—Aurora, Honey Bee, Indigo Gem, Wojtek, Zojka, and the regionalized variety Leningradsky Velikan—regarding the content of various organic acids, carbohydrates, and phenolic compounds. The study also examined the degree of their transformation during storage in a standard gas atmosphere at low positive temperatures. For the majority of taxa classified within the genus Lonicera, the cool and rainy weather conditions experienced during May and June of 2025 contributed to the enrichment of the fruits, in comparison to the relatively more favorable weather conditions observed during the 2023 season. A set of 14 biochemical characteristics was utilized to assess the organic compounds of various chemical natures and the increase in their nutritional value. The smallest increase was observed in the Leningradsky Velikan variety, while the most significant increase was observed in the new tested taxa, particularly in the Indigo Gem and Zojka varieties. Despite the relatively brief storage period of honeysuckle fruits, which is limited to eight days, a substantial transformation in their biochemical composition was observed. This transformation revealed patterns common to all taxa, manifested in a marked depletion of free organic acids, ascorbic acid, and hydroxycinnamic acids, as well as, to some extent, pectin substances and anthocyanin pigments. This depletion was accompanied by a decrease in the total amount of bioflavonoids, against a background of enrichment with dry matter, catechins, flavonols, and soluble sugars, along with an increase in the sugar-acid index and ambiguous changes in tannin content. The direction and degree of expression of the identified trends were found to be largely determined by the plant genotype and the chemical nature of the organic compounds. The biochemical composition of fruits was found to be most influenced by the seasonal hydrothermal regime in the Indigo Gem and Aurora varieties, with the greatest impact observed in the Honey Bee and Zojka varieties, and an intermediate response seen in the Wojtek and Leningradsky Velikan varieties.

The article presents data from monitoring studies (2018–2022) of resource-cenotic parameters (occurrence, abundance, yield, height) of Vaccinium vitis-idaea L. (lingonberry) on the age gradient of mossy pine (Pinetum pleuroziosum) stands in the Grodno Pushcha Republican Landscape Reserve (area of 20.5 thousand hectares; Avgustovskoye Forestry, Grodno Region, Universal Transverse Mercator: 34UFE3). Resource surveys were conducted using the projective coverage method. The occurrence of V. vitis-idaea in pine communities varies from 4 to 100 %, the abundance – from 1.00 ± 0.00 to

12.45 ± 1.08 %, the shoot height – from 5.89 ± 0.32 to 10.39 ± 0.42 cm, and the shoot yield of V. vitis-idaea (air-dry) – from 0.74 ± 0.13 to 51.07 ± 0.82 g/m². High values of resource-cenotic parameters of V. vitis-idaea were noted in overmature pine forests with mosses. As the age of the standing forest and stable living ground cover of the forest type increases, a linear relationship is observed between the resource-cenotic parameters of V. vitis-idaea and moisture (r_s = 0.57–0.74, p < 0.05) and soil nitrogen content (r_s = 0.50–0.57, p < 0.08). It is recommended to remove Cormi Vitis idaeae in a prifitable volume before felling or 1–2 years after this type of felling.

This study presents the results of a comparative analysis of the anatomical and morphological characteristics of the needles of the “witch’s broom” on Weymouth pine (Pinus strobus L.) and its vegetative progeny. Needles from the normal part of the crown were used as a control. It is shown that the length, surface area, volume, dry Needles from the normal part of the crown were used as a control. It is shown that the length, surface area, volume, dry mass, phloem area, and resin canal area in witches’ brooms are below normal. At this width, the epidermal strength, endoderm cell count, resin canal count, and resin-bearing tissue area are above normal. In the vegetative progeny, there is an even greater reduction in the key characteristics, with stable (width-to-thickness ratio) and increasing (integumentary tissue thickness) values established in relation to normal. 

The results of using domestically produced bacterial preparation solutions under depleted substrate conditions are presented. The active strains were Enterobacter, Rahnella, Pseudomonas, and Bacillus. The experimental variants demonstrated enhanced soil respiration and an increase in soil microbial mass by 38 and 30%, respectively, compared to the control sample. The addition of Bactopin and Gordebak increased available phosphorus in the substrate and had virtually no effect on exchangeable potassium levels. The amount of mobile phosphorus increased in the experimental variants which contained Baktopin and Gordebak, while the amount of exchangeable potassium did not change significantly. The physiological response of leaf lettuce plants to the bacterial preparations resulted in a significantly increased chlorophyll а (by 31 %) and carotenoid (by 36 %) content, which contributed to a noticeable increase in morphometric characteristics (plant height, leaf blade area) and bioproduction parameters (dry mass of aboveground and underground parts) relative to the control by an average of 1,86 and 1,31 times. The laboratory experiment was carried out in 3 repetitions.

The paper presents the results of testing a conceptual model for a comprehensive assessment of the natural tourism and recreation potential, which is characterized by a system of target indicators differentiated according to the structure of their tourism and recreation use. The comprehensive nature of the assessment is based on the integration of medical, biological, technological, psychological, and aesthetic assessments, and the use of GIS technologies to identify the structure and geography of the main types of tourism and recreational use of the natural potential of rivers and the limiting factors. The results of a comprehensive assessment of the natural potential of 372 sections of 166 rivers in Belarus showed that they are most suitable for such types of recreation and tourism as amateur fishing, amateur hunting, and boating, with a low proportion of favorable river sections for swimming, scuba diving, and yachting, as well as the possibility of water skiing on certain sections of rivers in the Gomel and Vitebsk regions. For most types of tourist and recreational use, there are three groups of limiting factors: general, specific, and individual. At the same time, the share of common factors represented by a combination of hydrological, hydrochemical, and landscape factors is leading for swimming (84.4 %), boating and amateur hunting (72.9 % each), scuba diving (71.2 %), and water skiing (53.1 %); individual morphometric factors – for yachting (56.3 %); and special factors of hydrochemical nature – for recreational fishing (56.6 %). A significant percentage of individual morphometric factors (43.6 %) was recorded for water skiing, and general factors of hydrochemical genesis (43.4 %) for recreational fishing. The geographical interpretation of the proportion of limiting factors varies across the country’s regions and depends on the type of tourist and recreational use. The results of a comprehensive assessment of the natural tourism and recreational potential of rivers have provided a scientific and practical basis for developing a strategy for the development of water tourism on the rivers of Belarus.