север Нижнего Поволжья

Short-term fluctuations of the bird number and distribution, exhibiting a reliable relation with microclimatic phenomena (weather features of adjacent seasons, the nested population value in the previous year etc.) are shown.

The paper analyzes prognostic models of the ornithofauna dynamics of the Northern Lower-Volga region, based on our analysis of cause and effect relationships in the dynamics of their distribution, historicofaunistic layers, and ecological groupings. As a result, abundance and distribution fluctuations have been revealed with no clear relation to the dynamics of climatic parameters but subject to certain cyclicity (Locustella fluviatilis, Motacilla citreola).

Objective of the study – to identify biotopical American mink in the north of the Lower Volga region and conduct its ranking analyzed the predator population density in model habitats. We used the methods of accounting the route trail mapping and detection of sites with use GPS-navigator. Calculation animals identified on individual sites using camera traps, as well as classical methods of estimation of population density of predatory mammals. Statistical analysis was performed using cluster analysis.