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September 2015, № 9 (184)

Popov S.V. BIOTOPIC PREFERENCE AND SPATIAL DISTRIBUTION OF THE POPULATION STRIGIFORMES ON THE BORDER OF THE TAIGA AND FOREST-STEPPE BEYOND THE URALSOne of actual problems of modern ecology is studying of bonds between species composition of communities both different ecological and space factors. The purpose of this article is studying of topical preferences and space structure of the population Strigiformes on border of taiga and the northern forest-steppe of Zauralie. For achievement of the goal, in the least changed biogeocenoses, the network of constant routes and platforms has been put. Besides, for search of rare species additional single routes outside areas of stationary researches were put. Selectivity of types concerning mosaic of vegetable cover was studied on the basis of mapping of nests and the analysis of satellite images by means of GIS. Round each nest zones with a radius of 100, 500 and 1000 meters were allocated. For each such zone amount of forests, share of the area occupied with osier-beds, fields and meadows was calculated. On the basis of comparison of structure of vegetation around nests and in accidentally chosen points within platforms, the conclusion about preference or avoiding of amount of forests, fields, osier-beds, etc. is drawn. Definition like space structure of the population was carried out due to comparison of the real and theoretically expected distribution type. Modeling of space structure of the population Strigiformes was carried out by means of method of kernel (Kernel Density Estimation) and the specialized computer OpenJump program. For Strigiformes the labile space structure of the population is characteristic. Annual reproduction of space structure of the population is not observed. The increase in number of look can lead to reduction of distances to the closest nest of the look and to emergence of nested aggregations. The choice of specific place for nest is defined by structure of mosaic of vegetable cover and is partly connected with presence of closely related look.Key words: space structure of population, population of birds, Strigiformes, forest-steppe, Zauralie.


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About this article

Author: Popov S.V.

Year: 2015

Sergey Aleksandrovich

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