Effect of Summer Monthly Temperatures on Light Tree Ring Formation in Three Larch Species (Larix) in the Northern Forest–Tundra of Siberia

Abstract

Studies in the northern forest–tundra of Siberia have been performed to estimate temperature conditions in individual months of the growing season that have an effect on the formation of light tree rings in three larch species: Larix sibirica, L. gmelinii, and L. cajanderi. The threshold air temperatures for light ring formation have been determined and found to be similar in all the species. Differences in temperature response are conditioned mainly by the longitudinal climate gradient rather than by species-specific features.