Home – Home – Jornals – Contemporary Problems of Ecology 2008 number 2

Changes in the indicative characteristics demonstrating the accumulation of heavy metals in tundra shrubs under the conditions of aerotechnogenic pollution of the Yamal Peninsula were investigated. Calculations depicting the theoretical solubility of complex-forming metals depending on pH of the medium in the system containing

Trends of changes of forests and phytomass resources over the territory of Georgia since the early stage of the existence of human society are considered. The landscape approach is used in the investigation. Map an

Features of the distribution of the life forms of indigenous flora fraction (1888 species) over the botanical-geographic regions of the District are considered. This allows one to characterize the ecological-coenotic and adaptation features of the plant cover of these regions.

A number of distributions describing a small sample is analyzed. Estimation of the horizontal structure of coenoses is made on the basis of small coenotic formations. i.e. biogroups at a level of a growing individual. The characteristics of biogroups are the number of

Photosynthesis and respiratory rates are the standard indicators for plant state assessment. The photosynthetic activity is often measured by metering CO2 decrease. The INNO-Concept GmbH Company (Germany) has produced

Features of plant cover formation over the territories disturbed by coal mining in different n

The content and distribution of Mn in soil-forming rocks, natural waters, soils, and plants of steppe, meadow and agricultural cenoses of Transbaikalia region are examined. The content of Mn in soil-forming rocks, soils and natural waters is 1,3

The paper presents an outline and analysis of the structure of the adventive flora of the North-Eastern Prisayan

Results of passage route assessments of birds over the territory of the Sary-Chelek biospheric reserve during the years 1982

Data on the action of animals on the vegetation cover of the Commander Islands are reported. Vegetation at the regions of arctic fox dens and seabird colonies is characterized; this vegetation is formed as a result of the transformation of the initial one. Often similar plant groups are formed. The features of the zoogenic vegetation of different origin at the Commander Islands are discussed; its comparison with the zoogenic vegetation in other regions of the Arctic and Subarctic are discussed.

In connection with the problem of water bloom in continental water reservoirs due to cyanobacteriae, the effect of hydrophysical (wind strength, intensity of photosynthetically active radiation, and atmospheric precipitation) and geochemical factors (concentrations of the forms of nitrogen and mineral phosphorus in water) on the fluorescence characteristics of eukaryotic microalgae and cyanobacteriae characterized by different abilities to light-dependent regulation of floatage is investigated in the surface layer of a small eutrophic water reservoir Bugach in 2002.

Plant introduction is considered now as the most promising way of biodiversity preservation. Collections of the Botanical Garden of the Institute of Biololy KSC UD RAS contain over 3.5 thousand decorative plant taxa (species and varieties), of which about 150 species are rare and protected in various regions of Russia and neighboring countries. Among the arboreal plants growing in the arboretum, 26 taxa belong to rare and endangered species, of them 19 taxa are exotics and 7 are native species. Among the plants growing in a glasshouse, 7 arboreal species belong to rare and endangered ones, all being introduced from other floristic areas. The paper presents results of the studies on biomorphological features of rare species, plant mutability in the course of adaptation and plant reproduction capacity under new ecological conditions.

Ten populations of Ribes nigrum L. (black currant) in the basin of the Ingoda river were investigated. The description of black currant participated phytocoenosis in which the researched populations grow was carried out. The ecological and geographical characteristic of population habitats of currant black was given.

Two forms of Siberian apple tree were revealed in the Selenginsky region of Buryatia that are distinguished by stunting, ability to propagate by root shoots, natural growth as a bush, shortened interstitials, as well as high decorative properties. These lines represent a very interesting material for investigation (microevolution processes, investigation of the genetic and biological foundations of dwarf state, selection of dwarf stocks, and introduction).

A multi

The composition and comparative analysis of the partial floras of habitat types of the post-drag landscapes of the model basin of the Suenga river in the Salair mountain ridge is revealed and presented.

The data on the ecology of Rhododendron mucronulatum, Rh. sichotense and Rh. dahuricum, as well as the results of investigation of the flowering system structure in these species in 5 coenopopulations in the Primorsky region and Chita region are presented. Understanding of the ecological requirements and morphological structure of the studied species is very important for the development of cultivation technology and systematic position of Rhododendron L. In natural coenopopulations, Rh. mucronulatum blooms one-two weeks earlier than Rh. sichotense and Rh. dahuricum. However, under the conditions of Vladivostok, Rh. sichotense begins to flower earlier; Rh. dahuricum and Rh. mucronulatum start to bloom one week later.