Статьи

COMPOSITION AND STRUCTURE OF THE HETEROCERIDAE (COLEOPTERA) POPULATION IN THE SHORE ZONE OF WATER OBJECTS IN THE SARATOV REGION

Authors: Sazhnev A. S.

The composition and structure of mud-loving beetles in the conditions of the shore zone of water objects in the Saratov region were studied for the first time. Main characteristics of the water bodies surveyed are provided. Data are presented on the biotopical corrrespondence, seasonal dynamics and hibernation of several species of mud-loving beetles.

SPATIAL HETEROGENEITY OF THE ICHTHYOFAUNA OF NORTHERN EURASIA AND ITS BIOGEOGRAPHICAL DIVISION

Authors: Ravkin Y. S., Yadrenkina E. N., Interesova E. A., Bogomolova I. N., Yudkin V. A., Lyalina M. I., Kosareva A. M.

Biogeographical division of Northern Eurasia (within the former USSR borders) was carried by the results of our cluster analysis of the fish fauna from 597 sites according to the BIODAT database territory division. Our classification obtained on the basis of the Jacquard similarity coefficients includes 2 regions, 12 dominion, 8 provinces, and 11 districts. The offered division considers 67% of the similarity coefficient dispersion of the fauna analyzed, which is by 21% higher than an earlier developed scheme (Berg, 1962) which includes a bigger area of the continent.

FREE NUCLEOTIDES AND CHLOROPHYLL CONTENTS IN THE PLANKTON OF THE UPPER VOLGA RESERVOIRS

Authors: Mineeva N. M., Andreeva A. M., Ryabtseva I. P.

The content and distribution of chlorophyll (CHL) and free total nucleotides (FTN) in the plankton of the Ivankovo, Uglich (August 2005), Rybinsk and Sheksna (July 2007) reservoirs were studied. With the average CHL from 7.6±1.5 to 13.1±1.4 µg/L and the average FTN content from 76±8 to 138±20 µg/L, the highest values were obtained in the eutrophic Ivankovo reservoir. The relation of CHL and FTN with environmental factors is analyzed. It has been shown that under stable external conditions, the plankton distribution over the reservoirs is characterized by moderate variability.

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

Authors: Kotyukov Y. V.

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)

Authors: Gerasimov Y. L., Klenova N. A., Orlova S. A.

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

Authors: Berezutsky M. A.

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)

Authors: Bergman I. E.

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

Authors: Belyachenko A. V., Piskunov V. V., Belyachenko A. A.

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

Authors: Tarakhtii E. A., Mukhacheva S. V.

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

Authors: Sizemskaya M. L., Vsevolodova-Perel T. S.

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.

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