Daqinggou Ecological Station;
Institute of Applied Ecology;
Chinese Academy of Sciences;
Shenyang 110016;
China;
School of Biological;
Earth and Environmental Sciences;
The University of New South Wales;
Sydney NSW 2052;
Australia;
School of Forestry and Wildlife Sciences;
Auburn University;
AL 36830;
USA;
Graduate School of Chinese Academy of Sciences;
Beijing 100049;
China;
leaf thickness; leaf density; specific leaf area; leaf dry matter content; leaf N concentration; N resorption efficiency;