THEORY AND METHODOLOGY
Unification, development trends, self-organization and harmony of relief-forming processes are based on the principle of minimizing the spending of internal energy of geomorphologic objects and the Curie principle which is realized by adaptation of their morphology and symmetry to the symmetry of the force field in the morphogenesis sphere. It is energy factors that provide for the selection of morphological characteristics, the homology and convergent development of landforms, on the one hand, and, on the other, their stability, lifetime and dominating role in the formation of the Earth’s morphological landscape.
Principal morphological classes of convergent geomorphologic objects are identified, and the homologous series of landforms are specified, as well as two types of convergent morphogenesis.
GEOGRAPHY AND ECOLOGY
The structure of vegetation of semi-desert landscapes in the disposal areas of the «Soyuz» launchervehicle first stages in the south-west of the Karaganda region (Republic of Kazakhstan) is considered. The degree of the rocket-space activity impact was compared with traditional types of the anthropogenic transformation of arid ecosystems, i.e. grazing and fires. Plant communities in disposal areas of different ages were classified according to the degree of degradation on the basis of phytocoenotic, structural and cenopopulation indicators. The vulnerability of different ecosystems to the rocket-space activity impact was evaluated. Four complexes of associations were identified in ten disposal areas of first rocket stages side blocks, namely Caragana-Artemisia, Stipa-Artemisia, Ceratocarpus-Artemisia, and ClimacopteraArtemisia. They represent various groups of associations, united by their position in landscape and the degree of agricultural transformation.
The influence of rocket-space activity includes mechanical, chemical and pyrogenic impact on ecosystems. In general, it is of local character. It is only pyrogenic impact in disposal areas of rocket stages that in some cases could produce major disturbances of vegetation. The qualitative indicators of phytocenosis (the ratio of ecological-coenotic groups of plants and the age structure of the dominants) gain in importance for the degree of degradation assessment with the increasing age of the rocket stages disposal areas. Usually communities with the highest degree of degradation are forming in the main engines disposal areas and within the burned areas. In most cases, such communities occupy less than 100 m2 (for one disposal area). Communities of Caragana-Artemisia complex are the most vulnerable to the technogenic impact in the disposal areas of rocket stages. Because of the slow growth of Caragana balchaschensis and Salsola arbuscula shrubs the restorative successions could take more than 20 years there. Communities of Ceratocarpus-Artemisia and Climacoptera-Artemisia complexes, which have homogenous floristic composition and simple structure, could restore in the disposal areas of rocket stages in less than 5 years after the impact.
REGIONAL STUDIES
After the collapse of USSR a new object of study appeared for the scientists. It is the international migration between Russia and the former USSR countries. The retrospective review of migration relations of the post-Soviet Russia and these countries shows the regions which are most attractive for migrants. Such analysis helps to make forecasts about the resettlement of new migrants.
The article presents the results of studying the migration flows from the neighboring countries to Russia in the period of 1992 to 2010. The hypothesis of the study is based on the synthetic theory of international migration which assumes that after transition to the market economy the international migrants move to the countries and regions with already available close communications.
To test the hypothesis, we calculated the intensity of migration ties between Russia and CIS countries and the migration gain in the regions of Russia due to the inflow from the neighboring countries. Our calculations show that despite the significance of the borderline factor it does not always determine the choice of the place of residence in Russia.
The paper presents the results of studies on the relationship between the Middle and Late Holocene climate changes and the evolution of spruce forests (Piceetum myrtilloso-sphagnosum), the typical geosystem of the southern taiga subzone within the East European plain. The history of successions of forest-forming tree species within a sample plot and the intensity of paludification processes were traced basing on the pollen analysis and radiocarbon dating. The data obtained showed that the areas of present-day spruce forests, were covered by broadleaf-spruce forests with significant share of broadleaf tree species (7000– 2900 cal. yr. BP) and broadleaf-spruce forests with high abundance of spruce (2900–800 cal. yr. BP). Despite significant fluctuations of temperature and precipitation in the second half of the Holocene, the broadleaf-coniferous forests continued their existence in the study area for a long time.
The process of paludification and development of the Sphagnum spruce forest started about 800 cal. yr. BP as a result of climate moistening and cooling during the Little Ice Age. During the Middle and Late Holocene the peat accumulation rate in a small depression within the sample plot varied between 0.08–0.14 mm/year. A sharp increase in peat vertical growth was registered for the last 500 years, when the rate of peat accumulation increased 5 times up to 0.44 mm/year. The increase in peat accumulation rate could be attributed to climatic causes, so the recent climate changes will perhaps contribute to further peatland growth.