Peculiarities of distribution of heterotrophic microorganisms and bacteria from the genus Pseudomonas in the Lake Baikal were studied. It is demonstrated that the largest numbers of microorganisms is are isolated from samples collected in the littoral zone at the origin of the Angara River, in the vicinities of settlement Listvyanka
Attachment of flagellates of the genus Trypanosoma to fishes of the Siberian complex of the Baikal, and those oil the genus Cryptobia to the Baikal complex has been found. A consequence thereof is the diminution of occurrence of Trypanosomes from the littoral to the deep zone and an increase of affection of fishes by Cryptobia.
It has been established that the newcomer Gmelinoides fasciatus has not have any considerable influence on the structure of the helminthes community in perch fry of the Rybinsk Reservoir, since it began to be consumed by this year
For the first time, the species composition and spatial distribution of oligochaetes has been carried out in the major part of the Chibyrkui Gulf of the Lake Baikal. The elucidated species composition (69 species) in combination with endemic and widespread oligochaete complexs is determined by the presence in the gulf of two ecological zones
The ecological factors playing an important role in the evolution of Baikalian amphipods are considered. The trophical factor causes a diminution of the size of animals and appearance of dwarf species. At the same time, specialization with respect to food composition as an ecological factor is not widespread. The temperature factor tells on diffusion of Baikalian species to gulfs and sors, and on diel vertical migrations of benthos amphipods. The temperature and the illumination factors together determine the seasonal and circadian time course of the population structure and the change of the species composition of amphipods with respect to substrate, habitation depth, and in the littoral zone, as well as with respect to reproduction season. The parasite factor can give origin to small-sized and dwarf males in some Baikalian species, as well as increase the species diversity of deep-water nectobenthal amphipods. In the formation of the Baikalian deep-water side swimmers fauna a great role is played by regions with unusual geological conditions.
By the results of long-term studies of zoobenthos of the rivers Selenga (the main tributary of the Lake Baikal) and Chikoi (one of the right-bank tributaries of Selenga) during the under-the-ice period (1987
Altai region was subjected to the action of nuclear testing performed at the Semipalatinsk polygon at the period from 1949 till 1963. In the present study, the data are presented on genetical investigation of populations of Drosophila melanogaster in Altai region (Byisk, Zmeinogorsk, Pospelikha) and Altai Republic (Gorno-Altaisk): concentration of visible mutations of all types rises up to 3
On the material of summer censuses carried out on routes extending over about 8 000 km, the spatial non-uniformity of bird population in the mountainous Altai region was analyzed. The most pronounced altitudinal-zonal variability of bird communities is characterized by a gradual change of their species and faunistic composition , an increase of the total abundance, biomass and species abundance in the direction from the steppe to the forest zone and by subsequent continuous diminution as the altitude increases , up to the subnival zone. Provincial differences of uniform ornithocomplexes are manifested much less clearly. Classification of the summer bird population of the Altai and a quantitative estimation of force and commonness of constraint between the spatial non-uniformity of population and the environmental factors have been made.
VLADIMIR V. TATARCHUK1, IRINA A. DRUZHININA1, TAMARA M. KORDA1, EDOUARD V. RENARD2and VLADISLAV G. TORGOV1 1Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, Pr. Akademika Lavrentyeva 3, Novosibirsk 630090 (Russia) E-mail: tat@che.nsk.su 2Bochvar All-Russian Research Institute of Inorganic Materials, Ul. Rogova 5, Moscow 123060 (Russia)
Pages: 547-555
In connection with search for methods to recover fission palladium from highly active liquid wastes from spent nuclear fuel reprocessing, new results were obtained on palladium solvent extraction by organic sulphides from model (in the absence of radiation) nitrate-nitrite solutions containing also a number of accompanying elements (Ag, Ru, Rh, Te, Se, Sb, Mo, Zr, Fe, Ni). It is shown that within the investigated ranges of the acidity of aqueous phase (0.5
