местообитания

DYNAMICS OF THE ABUNDANCE AND COMMUNITY STRUCTURE OF SMALL MAMMALS IN THE SARATOV TRANS-VOLGA REGION

The population of small mammals in different areas of the Saratov Trans-Volga region features long-term and constantly increasing numbers of Sylvaemus uralensis, and its wide distribution in a variety of habitats. The maximum density of S. uralensis is 72.0 ind. per 100 trap-days and the fraction in catches is 73.0%. A tendency is observed to an increasing numbers of Microtus arvalis.

Arthropod abundance on bustard nesting sites in the Saratov Trans-Volga region

The results of our study of the quantitative and qualitative arthropod composition at potential nesting areas of Otis tarda in the Saratov Trans-Volga region are presented. Specific information obtained at 7 areas (2 fallow fields, two fields of winter and spring wheat, two natural fallow lands of different ages, and virgin land) in 2012 is given. A comparative analysis of some indicators of the arthropod abundance and biomass on winter fields treated with chemicals and untreated is conducted. The obtained results are compared with those of previous years.