Home – Home – Jornals – Contemporary Problems of Ecology 2007 number 6

Classification of the bird population of the West-Siberian plain and the Altay is carried out; the structure of the spatial variability of ornithocomplexes is revealed. With the help of qualitative linear approximation (a qualitative analogue of the regression model), the informative content of the obtained classification and structural representations is calculated.

Fires in the pine forests of Middle Siberia make a substantial contribution into carbon resources. The emission value is essentially affected by the intensity of forest fires, types of vegetation, and the conditions existing at the grow sites. During extremal fire-risk seasons, emissions from forest fires can increase several times. The duration of an average interval between fires decreases from the north to the south and is determined by the latitude and by the degree of landscape apartness, as well as by the anthropogenic load.

The comparison between the coenofloras of Yamal and Taymyr for three subzones is carried out: southern, typical and Arctic tundras. The parameters of activity and richness of species of the life-forms in coenofloras were used. The an

Spatial-temporal superposition of the data on large forest wildfires and lightning are an

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Bacteria of Enterobacteriaceae family were isolated from the soil, tissues and surface of a number of wild and cultivated plants. All the isolated cultures exhibited a wide range of stability against 11 antibiotics and high adhesiveness to human erythrocytes. Investigation showed the possibility of concentrating the microorganisms that are pathogenic for humans in plant tissues.

Bogs occurring at the territory of natural park

Results of the investigation of the siberian species of Myricaria Desv. genus are reported. Myricaria is a shrub the biology and ecology of which are still poorly investigated. It grows on pebble and rocky banks of the mountainous rivers in the southern regions of Siberia. The ecological features of blooming, bearing, ri

Data on epi

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Seed burial was determined in the soil of n

As a result of 17-year investigations, eight associations of weed vegetation in cereal-fallow rotation and unchangeable wheat in leached chernozems of the areas near the Ob River were singled out. Three of them are analyzed in the paper. The main effect on the formation of the weed community association was caused by long-term permanent agrocenosis factor.

The paper presents the results of unreduced egg-cell parthenogenetic development induction by intergeneric pollination in different ecotypes of  Fragaria vesca L. (2n = 2x = 14). Parthenogenetic seedlings had the same chromosome number as the mother plant did. We revealed various levels of tendency to pseudogamic diploid parthenogenesis among the specimens of F. vesca. Wild specimens less tend to the phenomenon of parthenogenesis than cultural ones (Alexandria variety) do. For F. vesca under the climatic conditions of West Siberia, diploid parthenogenesis is the facultative additive insuring mechanism of seed-forming which is realized in case of problems with pollination or fertilization.

Species composition of algae in the bed of the Elegest River and its tributaries was studied in winter. One hundred thirty eight species from 6 divisions: Cyanophyta

Possibilities of the production of ecologically pure provision products in the Buryat Republic are considered; the dependence of the quality of provision products on environmental pollution is shown; the territories unfavourable for the production of ecologically pure provision products are picked out.

The materials on the research of ecologo-biological particularities of  Caryopteris mongholica Bunge are considered. The modern conditions of coenopopulations are given. The data on the morphology of plant, anatomical structure of leaf and stem and water mode (transpiration intensity, water content), geographical distribution of this species in Russia (Transbaicalia) are reported. For the purpose of species conservation, it is recommended to establish botanical reservations.

The data of perennial algofloristic investigation of the Shulgan-Tash cave are reported. Taxonomic an

Results of the investigation of lichens of the forest ecosystems of the eastern coast of Lake Baikal during the years 2001