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Dendroecological techniques were used to examine the relationships  between topographic aspects, climate factors and radial growth of Picea meyeri and  Larix principis-rupprechtii in Luyashan Mountains, North-Central China. Four sites  were selected at timberline and totally 67 trees and 134 cores were collected. Pearson correlation and regression surface analysis were conducted to reveal the growth-climate relationships. The results indicated that the two species both showed significant negative correlations with temperature during preceding November on the two topographic aspects. On both slope aspects, growth of P. meyeri exhibited significant negative correlations with precipitation in current June, whereas growth of L. principis-rupprechtii showed significant negative correlations with precipitation in preceding September. On  north-facing slope, tree growth was limited by low temperature in early growing  season, which not shown on south-facing slope. If climate warming continues,  L. principis-rupprechtii may be more favored and a reverse between relationships with temperature and precipitation maybe occur in growth of trees. Treeline position on the north-facing slope may possess a greater potential for elevation shifting than the  south-facing slope. Our results supply useful information for discussing the potential effect of future climate on the forest growth in North-Central China

forests

Topography- and Species-Dependent Climatic Responses in Radial Growth of Picea meyeri and Larix principis-rupprechtii in the Luyashan Mountains of North-Central China