Статьи

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

Authors: Golovatyuk L. V., Shitikov V. K., Zinchenko T. D.

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

Authors: Golovatyuk L. V., Shitikov V. K., Zinchenko T. D.

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

Authors: Golovanov Y. M., Abramova L. M.

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.

MYELOGRAMS OF MARSH (PELOPHYLAX RIDIBUNDUS) AND POOL FROGS (PELOPHYLAX LESSONAE) (AMPHIBIA: RANIDAE) OF CONVENTIONALLY “BACKGROUND” AND ANTHROPOGENOUSLY TRANSFORMED TERRITORIES IN THE NIZHNIY NOVGOROD REGION

Authors: Romanova E. B., Shapovalova K. V., Mar’in I. A.

Our comparative analysis of the myelograms of these lake and pond frogs has revealed a higher erythropoietic activity of the bone marrow in the conditionally "background" amphibians (group 1) as compared to the individuals from urbanized (group 2) territories. Restructuring of the bone marrow cellular composition and activation of the myeloid cells were the adaptive reaction of the amphibians to living in polluted conditions of their aquatic environment. The response variability of particular myelopoiesis elements reflected the plasticity of the organism’s compensatory abilities.

ENVIRONMENTAL ORGANIZATION OF THE SPATIAL-TYPOLOGICAL DIVERSITY OF COMMUNITIES OF AMPHIBIANS, REPTILES AND SMALL MAMMALS IN THE WEST SIBERIAN PLAIN

Authors: Ravkin Y. S., Bogomolova I. N.

The differences in estimates of the relation of the population diversity of amphibians, reptiles and small mammals with environmental factors were analyzed by the species’ abundance and contributions to the Shannon index on the basis of their energy indices, as well as the difference in general representations of the spatial-typological variability of the communities of these animal groups with the West Siberian Plain as an example.

ON INCREASING THE ACCURACY OF HUNTING ANIMAL ACCOUNTING IN SMALL AREAS

Authors: Kondratenkov I. A.

The possibility of increasing the accuracy of hunting animal accounting by replacing the average values of various accounting parameters obtained for small areas by the average values of the same parameters obtained for larger areas is considered with the results of our winter route account of the moose Alces alces Linnaeus, 1758, held in the Saratov region as an example.

VITALITY DYNAMICS OF TULIPA GESNERIANA L. (LILIACEAE, LILIOPSIDA) POPULATIONS IN THE LOWER VOLGA REGION AND ADJACENT TERRITORIES

Authors: Kashin A. S., Petrova N. A., Shilova I. V., Kritskaya T. A., Ugolnikova Y. V.

The vitality of 38 Tulipa gesneriana populations in the Lower Volga region and adjacent territories was monitored during four agricultural seasons (2013 - 2016). A significant variability of this parameter, correlated with certain geographical trends, is shown within the territory surveyed. Two population clusters were revealed, differing by oppositely directed responses to external factors. A similar variability character was also obtained from ordination of the studied cenopopulations using the average values of morphological traits by means of the principal component analysis.

ON THE DISTRIBUTION OF CAULINIA MINOR (ALL.) COSS. ET GERM. (HYDROCARITACEAE, LILIOPSIDA) ON THE TERRITORY OF THE NIZHNY NOVGOROD REGION

Authors: Birykova O. V., Schestakova A. A., Belyakov E. A., Garin E. V.

The results of our analysis of the Caulinia minor distribution in the Nizhny Novgorod region on the basis of published sources, herbaria samples and the authors’ original data are presented. The species preferring water bodies with well-warmed shoals and high mineralization levels was revealed. The species entering the Red Data Book is justified due to its location on the border of the habitat. It is proposed to promote the rarity status of the species in the region; recommendations on its conservation are given.

SALINITY INFLUENCE ON CHIRONOMID LARVAE (DIPTERA, CHIRONOMIDAE) IN THE CRIMEAN HYPERSALINE LAKES

Authors: Belyakov V. P., Anufriieva E. V., Bazhora A. I., Shadrin N. V.

The paper summarizes the results of our long-term research (2007 - 2015) of chironomids in 38 saline and hypersaline lakes in the Crimea. Chironomid larvae were found at salinities up to 340 g/l, and their occurrence frequency decreased as salinity rose above 30 - 50 g/l. Four species, namely, Baeotendipes noctivagus, Cricotopus gr. cylindraceus, Tanytarsus gr. Mendax, and Paratanytarsus gr. quantuplex were identified.

HISTORY OF BIRD STUDIES IN THE VOLGOGRAD REGION

Authors: Belik V. P.

On the territory of the contemporary Volgograd region, bird studies began in the second half of the 18th century. First ones were conducted by the heads of large academic expeditions, namely: S. G. Gmelin (1771, 1777), I. I. Lepekhin (1771, 1795), and P. S. Pallas (1788). Therefore, this period of ornithological research can be called the “academic period”.

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