AVIFAUNA OF NORTH-EASTERN SIBERIA MOUNTAINS
A. A. Romanov1, E. V. Melikhova2, M. A. Zarubina1, N. A. Miklin3, V. O. Yakovlev4
1Lomonosov Moscow State University, Moscow, Russia
2All-Russia Research Institute for Environment Protection, Moscow, Russia
3Institute of Biology and Chemistry, Moscow, Russia
4Russian Society for Conservation and Studies of Birds, Moscow, Russia
Keywords: авифауна, население, ареал, распространение, видовое разнообразие, горы Северо-Восточной Сибири, высотный пояс, avifauna, population, range, distribution, species diversity, north-eastern Siberia mountains, altitudinal belt
Abstract
In our study we analyzed ecological patterns of the altitudinal belts differentiation of birds fauna and population in the North-Eastern Siberia mountains. Data was collected during expeditions conducted in summer 2014-2016 in the regions with distinct forest, subalpine and alpine altitudinal belts. Breeding avifauna of the region includes 150 species. We specified distribution ranges of 26 birds species. Avifauna of the North-Eastern Siberia mountains develops in a framework of general zonal-landscape and altitudinal zonal patterns. Species diversity of birds decreases in northern direction and from foothills to the mountain tops. In the forest belt nest 63-64 species (89-97 %), in the subalpine belt - 13-33 species (20-47 %), in the alpine belt - 8-15 species (12-21 %). Wide vertical distribution of many bird species predetermines great general biodiversity even in high-altitude belts with extreme environment conditions. In the mountains of the North-Eastern Siberia population density of birds and their abundance progressively decrease with altitude in the majority of species. Birds population density of the forest belt is 312-594 ind./km2, subalpine belt is 57-266 ind./km2, and alpine belt is 40-111 ind./km2.
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