Статьи

FORMATION OF THE HYDROCHEMICAL REGIME OF THE UPPER REACHES OF THE URAL RIVER UNDER CONDITIONS OF TECHNOGENIC FLOW REGULATION

Changes in the chemical composition of water of the Ural River (upstream) along the section of regulation by a large artificial reservoir (the Iriklinsky reservoir) are shown. Decreased concentrations of major ions, organics, nutrients, and, especially, compounds of metals (copper, manganese, iron and aluminum) in the area below the reservoir were recorded. It was noted that physicochemical processes inside the Iriklinsky reservoir occurring at low water exchange could be the possible causes of these changes of the considered parameters.

INFLUENCE OF THE VEGETATION STRUCTURE ON THE NUMBERS OF GREAT SNIPES (GALLINAGO MEDIA) (SCOLOPACIDAE, AVES) ON LEKS

The numbers of birds and the vegetation structure were analyzed at 13, 7 and 10 leks of Great Snipes (Gallinago media) formed on agricultural lands in the Moscow Region in 2014 - 2016, respectively. Not less than 120 - 130 birds were concentrated on the leks annually, of which 82 - 94% were males. The abundance of Great Snipes changed asynchronously at different leks. It depended on neither the lek location (floodplain or watershed) nor the soil penetrability therein.

METHODOLOGY OF GENERALIZED ASSESSMENT OF THE INDICATORS OF SPECIFIC DIVERSITY AND THE NUMBERS OF TERRESTRIAL VERTEBRATES WITH THE ZONE OF INFLUENCE OF THE PROJECTED NIZHNEZEISK RESERVOIR AS AN EXAMPLE

Problems of comparative estimation of the nature-conservation importance of various littoral zones arise when a strategy of gentle nature management in the areas of influence of both present and planned reservoirs is developed. Integral biodiversity indices to consider both the specific richness and the abundance indices of every recorded animal species were developed for the area of expected influence of the projected Lower Zeya Hydroscheme.

INFLUENCE OF LEAD NITRATE AND ACETATE, WHEN INTRODUCED INTO SOD-PODZOLIC SOIL, ON ITS BIOINDICATIVE CHARACTERISTICS

The influence of two lead salts on the enzymatic activity dynamics (urease, dehydrogenase, the total activity of hydrolases, acid phosphatase, and peroxidase) at lead ion concentrations of 10, 100, 300, 500 and 1,000 mg/kg in a model 21-day experiment was estimated. A significant inhibitory effect of lead nitrate on the total activity of hydrolases, dehydrogenase and peroxidase at doses of 500 and 1,000 mg (Pb2+)/kg was observed, while lead acetate was characterized by predominantly stimulating effect.

ANALYSIS OF SOIL AND VEGETATION COVER FROM SATELLITE IMAGERY TO ASSESS ITS RELATION WITH LARK HABITATS (ALAUDIDAE, AVES) IN THE TRANS-VOLGA SEMI-DESERT

The work was carried out in the Dzhanibek and Bokeyorda districts of the West Kazakhstan region of the Republic of Kazakhstan in two key areas. The possibility to study the relationship between the distribution of the abundance of various lark species and their nesting habitats detected using high-resolution satellite images, ground geobotanical descriptions and bird counts on routes with a variable width of the accounting band, was evaluated.

QUANTITATIVE CHARACTERISTICS OF SEASONAL ASPECTS OF THE BIRD POPULATION IN KEMEROVO CITY AND ITS VICINITIES

On the basis of the data of year-round accounts in the city of Kemerovo and its vicinities in 1999 - 2001 a quantitative assessment of seasonal aspects of the bird population is given. Seasonal changes of the total number of birds, the specific diversity, the dominating species, the total biomass, the amount of the energy transformed by birds, their multistage distribution and faunistic composition are characterized and compared for all habitats surveyed.

REACTION OF BANK VOLES (MYODES GLAREOLUS SCHREBER, 1780) TO TRAPS WITH THE ODOR OF SYNANTHROPIC HOUSE MICE (MUS MUSCULUS s.l.) (MAMMALIA: RODENTIA): A FIELD EXPERIMENT

Our hypothesis that the exoanthropic forest rodent species (e.g. bank voles) avoid the urinary odor of the synanthropic house mice was tested in field experiments in August 2016. One count of small mammals was carried out in each of two 4-ha fields by the capture-mark-recapture technique during 12 days. 200 live traps (100 points, 2 traps per point) were exposed and controlled twice a day (early in the morning and in the evening) in each count.

ESTIMATION OF THE ZONAL DISTRIBUTION OF SPECIES OF THE BOTTOM COMMUNITIES IN RIVERS OF THE MIDDLE AND LOWER VOLGA BASINS

A comparative analysis of the variability of the specific structure of macrozoobenthos communities in small and medium rivers of the Middle and Lower Volga basin was made. A statistically significant influence of the natural-climatic zone where the waterway is located and a manifestation of the latitudinal gradient of biodiversity were shown. The list of indicator species with the use of various criteria of biotopic correspondence was composed for each identified geographical zone.

ESTIMATION OF THE ZONAL DISTRIBUTION OF SPECIES OF THE BOTTOM COMMUNITIES IN RIVERS OF THE MIDDLE AND LOWER VOLGA BASINS

A comparative analysis of the variability of the specific structure of macrozoobenthos communities in small and medium rivers of the Middle and Lower Volga basin was made. A statistically significant influence of the natural-climatic zone where the waterway is located and a manifestation of the latitudinal gradient of biodiversity were shown. The list of indicator species with the use of various criteria of biotopic correspondence was composed for each identified geographical zone.

REGULARITIES OF CEMETERY FLORA FORMATION IN TOWNS OF THE SOUTHERN CIS-URALS, REPUBLIC OF BASHKORTOSTAN

The results of our study of the partial florae of 5 cemeteries in two towns of the Southern Cis-Urals, namely, Sterlitamak and Salavat (Republic of Bashkortostan), are given. The cemeteries differed by their area, the time and nature of development, and forest cover. The taxonomical, biomorphological, geographical and ecological structures of the florae were studied, the levels of synantropization (from 50.7 to 67.5%) and adventization (from 19.4 to 37.5%) were estimated.

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