Статьи

ON REPEATED SETTLEMENT OF BURROWS BY COMMON KINGFISHER ALCEDO ATTHIS (ALCEDINIDAE, AVES)

Counts of kingfisher burrows were conducted during our boat routes on the Pra and Oka rivers (the Ryazan region) in 1976 - 2000. At every visit to a burrow, its contents were examined to ascertain the start date and clutch size, the egg size and shape, the number and age of chicks; adult birds were caught. On a control plot of the Pra river within the boundaries of Oka Nature Reserve, 1,087 inhabited burrows were found, of which 17 were re-settled during the season.

AEROBIC AND FACULTATIVE ANAEROBIC MICROBIOTA OF URBAN WATER BODIES (Samara City)

A study was made of the aerobic and facultative anaerobic microbiota of five small standing water bodies in Samara City during the summer-autumn period of 2013. An excess of the total number of bacteria, the presence of enterobacteria in all reservoirs, continuing in the autumn, were revealed. Four of the reservoirs studied have a poor ability to self-purification, which requires taking measures to monitor their condition and treatment.

CHARACTERISTICS AND MAIN DIRECTIONS OF ANTHROPOGENIC FLOROGENESIS IN THE SOUTHERN VOLGA UPLANDS

The whole range of aspects of anthropogenic florogenesis in the southern part of the Volga Uplands is considered. Trends in the anthropogenic dynamics of local floras during the last 100 years are reported. A 50 - 100 km shift north of the southern boundary of the habitat of some boreal species (Antennaria dioica (L.) Gaertn, Maianthemum bifolium (L.) F. W. Schmidt, Pyrola rotundifolia L. etc.) is noted. Data on the adventive flora and contemporary migration paths of the plants in the area under study are provided.

EFFECT OF COPPER SMELTER EMISSIONS ON THE STEM SHAPE OF SIBERIAN SPRUCE (PICEA OBOVATA LEDEB.) AND SIBERIAN FIR (ABIES SIBIRICA LEDEB.) (PINÁCEAE, PINOPSIDA)

The influence of industrial pollution on the stem shape of Siberian spruce and fir trees was estimated in the Middle-Ural Copper Smelter vicinity (Revda, Sverdlovsk region, the southern taiga). As the pollution source is approached, the stem taper increases with a decreasing form factor. A statistically significant increase of the stem taper of Siberian spruce in the butt end (by 22.9%), the lower (35.7%), middle (18.0%) and upper (9.0%) parts of the stem is shown.

CALANDRA LARK (MELANOCORYPHA CALANDRA) AND CORN BUNTING (MILIARIA CALANDRA) (PASSERIFORMES, AVES) CURRENT DISTRIBUTION AND ABUNDANCE ASSESSMENT IN THE NORTHERN LOWER-VOLGA REGION AND ADJACENT TERRITORIES

Features of the Calandra Lark and Corn Bunting spatial distribution and abundance dynamics in the Northern Lower-Volga region were studied in the framework of the «Atlas of breeding birds of European Russia» project. Significant habitat boundary changes to the north (Calandra Lark) and north-east (Corn Bunting) were found over the last 10 - 15 years. Extension limits of the habitat boundaries of both species studied in the European Russia were forecast.

BLOOD SYSTEM OF VOLES UNDER (CRICETIDAE, RODENTIA) INDUSTRIAL POLLUTION

A complex of the blood system characteristics and the concentrations of heavy metals (Cu, Zn, Cd, and Pb) in the liver of bank voles (Cl. glareolus) and red voles (Cl. rutilus) from background and industrial polluted areas were studied. Heavy metals were found to affect the structure of erythrocytes, the blood cell composition and concentration in the hematopoietic organs. The revealed differences between the blood system's responses of bank and red voles to pollution conditions are due to different levels of the pollutant accumulation in the body.

EARTHWORMS (LUMBRICIDAE, ANNELIDA) AS A COMPONENT OF ARTIFICIAL FOREST ECOSYSTEMS IN THE NORTHERN CASPIAN SEMI-DESERT

The results of the ongoing 50-year experiment of introduction of the Eisenia nordenskioldi species into massive oak plantations (Quercus robur L.) in the Northern Caspian semi-desert are analyzed. The change of the quantitative proportion of the dominant earthworm species due to the growth and conditions of forest cultures as well as their impact on the meadow-chestnut soils is considered.

INTERPOPULATION VARIABILITY OF SIGNS OF THE GENERATIVE ORGANS OF JUNIPERUS POLYCARPOS C. KOCH (CUPRESSÁCEAE, PINOPSIDA) IN DAGESTAN

The paper presents a comparative analysis of the variability of the weight and morphometric characters of the generative organs of five geographically isolated populations of Juniperus polycarpos C. Koch (1849) in Dagestan. The stronger dependence of the signs of gallberries than those of seeds on specific territorial conditions is shown. The genetic nature of the differences between the 1,140 m height populations of J.

SOME FEATURES OF THE ENVIRONMENTAL STRATEGY OF TULIPA GESNERIANA L. (LILIACEAE, LILIOPSIDA)

The vitality of 31 natural populations of Tulipa gesneriana is based on our field surveys conducted in several parts of European Russia in 2013 - 2015. Basic factors affecting the population vitality were revealed by analysis of 14 morphological parameters of T. gesneriana. Cattle grazing have turned out to be the most essential factor. The effect of other negative factors is much lower. Overall, the mixed stress-tolerant and ruderal ecologically-cenotic strategy is characteristic of the species studied.

CRITICALLY IMPORTANT AREAS FOR THE COMMON CRANE (GRUS GRUS LINNAEUS, 1758) (GRUIDAE, AVES)

The possibility of using a wider scale approach of the territorial conservation of rare objects of the wild nature is considered for the western subspecies of the Common Crane (Grus grus Linnaeus, 1758). This approach is in identification of critically important areas (CIA) at different (from global to local) levels not only for rare species but also for breeding groups, sub-populations, populations, subspecies, and communities of widespread and numerous species.

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