динамика численности сурка (Marmota bobac Muller, 1776) на территории заповедника "Стрельцовская степь". [Dynamique des populations de marmottes (Marmota bobac Muller, 1776)dans la réserve "steppe Streltsovskaya". Dynamics of number of the marmot (Marmota bobac Muller, 1776) at the territory of "Striltsivsky steppe" natural reserve].

Résumé

Dynamics of number of the marmot (Marmota bobac Muller, 1776) at the territory of "Striltsivsky steppe" natural reserve. — Borovyk Ye. — A perennial dynamics of density of a distribution of family settlements of the steppe marmot was traced. A reduction of number of the marmot’s population at the considered territory of the reserve from 1500 animals in 1985 to about 25 animals in 2005 was established. This phenomenon is caused by the destroying of age structure of the population that was induced with reservation successions of a vegetative cover. At the moment, development and, more importantly, practical realization of effective mode of ecosystem regulation is the most critical problem of the reserve. In the management of steppe ecosystems it is necessary to use such methods as periodic fire and a pasture on an aftergrass, a moderate pasture.