The climatic signal in tree rings of the common oak (<i>Quercus robur</i> L.) on the south-eastern border of its range in the Ural River basin, Russia

Aim. The objective of this study was to identify and analyze the climatic signal contained in tree-rings common oak on southeastern border its range Russia (Ural River basin). Material Methods . materials for were samples wood from three sites southern part Dziau-tyube ridge. Measurements ring-width performed MBS binocular microscope Lintab measuring complex with TSAP-WinTM software package. construction tree-ring chronologies carried out ARSTAN program. Dendroclimatic analysis R package treeclim. Results. limiting factors radial growth are precipitation during winter-spring season initial period vegetation greatest extent March-May. It shown that strength tree rings not constant over time. dynamics characterized by presence local periods decline, beginning which is timed years mass gypsy moth outbreaks. Conclusions. Since 1980s, there has been a significant decrease relationship amount reason change, our opinion, could be strong change condition trees stands caused consistent impact defoliation Gypsy moths late spring frosts.