Divergence Phenomenon of Radial Growth of Minjiang Fir in Response to Warming at Different Slope Aspects and Elevations on the Eastern Margin of the Tibetan Plateau

【Objective】Minjiang fir（Abies fargesii var. faxoniana） is an endemic and dominant tree species in the eastern Tibetan Plateau（TP）. This paper aims to study the spatial correlation of the divergence phenomenon of Minjiang fir with slope aspect and elevation and to explore its driving force, so as to provide a scientific basis for climate reconstruction and predict distributions of natural forests in southwestern China. 【Method】In the Miyaluo Forest Region on the eastern margin of TP, a total of 875 tree cores of Minjiang fir were collected from four main distribution slope aspects（NE, N, NW, and W） and three elevation gradients（3 650, 3 800, and 3 950 m）. After the growth trend of the tree ring was removed using dendrochronology,twelve tree ring standard chronologies of Minjiang fir were established based on terrain points. The regression analysis was used to study the divergence between the tree-ring index of Minjiang fir and the warming trend. The Pearson correlation analysis and sliding correlation analysis