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Winter Distribution of Birds in the West Siberian Plain

机译:西西伯利亚平原鸟类的冬季分布

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Long-term studies on the winter bird communities in the West Siberian Plain on a landscape basis allowed us to reveal the regional and seasonal patterns of their distribution. The highest proportion of species demonstrate forest-steppe and forest preference, a lower proportion demonstrate aquatic-semiaquatic preference, and the lowest proportion demonstrate tundra-forest-tundra preference. The preference zones do not change or extend in the winter period relative to summer postnesting period only in a small fraction of species; while the preference zones of most species were reduced or shifted. Commonly, the zonal borders of preferred habitats shifted southward to better climatic, feeding, and safety conditions. Only separate species with seasonally changing and specialized feeding demonstrated a northward shift of these borders.
机译:对西西伯利亚平原冬季鸟类群落的长期研究使我们能够揭示它们分布的区域和季节模式。物种的最高比例显示出森林-草原和森林的喜好,较低比例的显示出水生-半水生植物的喜好,而最低比例的则表现出苔原-森林-苔原的喜好。相对于夏季的筑巢期,仅在少数物种中,冬季的偏好区不会改变或延伸。而大多数物种的偏好区则减少或转移。通常,首选栖息地的地带边界向南移动,以改善气候,觅食和安全条件。只有具有季节性变化和专门喂养的单独物种才显示出这些边界向北移动。

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