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Stoichiometric characteristics of leaf carbon,nitrogen,and phosphorus of 102 dominant species in forest ecosystems along the North-South Transect of East China

REN Shu-jie1,YU Gui-rui1,JIANG Chun-ming1,2,FANG Hua-jun1,SUN Xiao-min1(1Synthesis Research Center of Chinese Ecosystem Research Network,Key Laboratory of Ecosystem Network Observation and Modeling,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China;2Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,China).  
One hundred and twelve sampling sites in the forest ecosystems along the North-South Transect of Eastern China(NSTEC) were selected to study the stoichiometric characteristics and variability of leaf carbon(C),nitrogen(N),and phosphorous(P) of 102 dominant species.The contents of leaf C(Cmass),leaf N(Nmass),and leaf P(Pmass) ranged in 374.1-646.5 mg·g-1,8.4-30.5 mg·g-1,and 0.6-6.2 mg·g-1,with the arithmetic mean(AM) being 480.1,18.3 and 2.0 mg·g-1,and the variation coefficient(CV) being 11.1%,27.5%,and 56.4%,respectively.The leaf C/N,C/P and N/P ranged from 14.1 to 64.1,from 70.9 to 838.6,and from 1.5 to 21.2,with the AM being 29.1,313.9 and 11.5,and the CV being 32.8%,48.3% and 44.1%,respectively.The mass ratio of C:N:P was 313.9:11.5:1,and the atom ratio was 810.9:25.4:1.As compared with those at global scale,the tree leaf Cmass and C/N in the study area were significantly higher,Nmass and N/P were significantly lower,while Pmass and C/P had less differences.
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