Annual cycles of warblers (Passeriformes, Sylviidae) North-Western Siberia and features of their transformations during Subarctic warming
V. N. Ryzhanovskiy
Institute of Plant and Animal Ecology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
Keywords: Subarctic, warblers, arrival, nesting, molting, climate
Abstract
The annual cycles of the Northwestern Siberian warblers are analyzed in order to identify the features that determine the possibilities of further development of the Subarctic in the conditions of current climate change. The penetration of Philloscopus inornatus, Ph. trochiloides and Silvia curruca into the Subarctic is limited by woody vegetation, Ph. borealis - by high willows of the river valleys of the Middle Yamal. Ph. trochilus, Ph. collybita and Acrocephalus schoenobaenus inhabit the strip of subarctic tundra of Yamal. The last three species are moving in a northerly direction. The probable advance of forest-tundra-tundra landscapes to the north under conditions of further warming will entail the northward movement of forest and shrub birds, not only warblers, since there are no factors preventing this.
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