Home – Home – Jornals – Contemporary Problems of Ecology 2014 number 6

Spatial differentiation of bird populations of the Putorana Plateau was analyzed. There are 137 nesting species in the region. Species diversity, population density and abundance of the majority of the birds have been decreasing. The density of bird populations decreases mainly in the course of transition from the subalpine to the alpine belt; such decrease is less pronounced at the transition from the forest to the subalpine belt. Most of the bird species occur in the wide range of altitudes usually encompassing at least two altitudinal belts. Population density of birds inhabiting the alpine, subalpine, and forest altitudinal landscape belts decreases in easterly direction: from the Putoranа Plateau to the Koryak Upland. Spatial dynamics of the bird population density and abundance of the majority of common species in the Putorana Plateau tends to increase from the highest inner regions of highlands to their periphery. Bird communities of the forest belt of the Putorana Plateau are more diverse and stable compared to those of the alpine and subalpine belts. In addition to high coefficient of similarity of populations, minimal amplitudes of species diversity and bird population density, relatively uniform distribution of more than 50 % of species over the territory of the region, and inessential provincial distinctions in the composition of dominant species were revealed here.