Palaeoecological evidence of changes in vegetation and climate during the Holocene in the pre-Polar Urals, northeast European Russia

摘要: This study investigated Holocene tree-line history and climatic change in the pre- Polar Urals, northeast European Russia. A sediment core from Mezhgornoe Lake situated at present-day alpine was studied for pollen, plant macrofossils, Cladocera diatoms. peat section Vangyr Mire nearby mixed mountain taiga zone analysed pollen. The results suggest that area experienced a optimum early summer temperatures were least 2 � C warmer than today. Tree birch immi- grated to onset of Holocene. Mixed spruce forests followed ca. 9500-9000 14 yr BP. Climate moist water level rose rapidly. hypsithermal phase lasted until 5500-4500 BP, after which forest withdrew catchment as result climate cooling. gradual altitudinal downward shift vegetation zones resulted present situation, with larch forming tree-line. Copyright 2003 John Wiley & Sons, Ltd.