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《Acta Botanica Boreali-occidentalia Sinica》 2003-06
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Numerical analysis of interspecific relationships in communities of Larix chinensis in Qinling Mountain

WANG Xiaoan,GUO Hua,XIAO Yaping (College of Life Science,Shaanxi Normal University,Xian 710062,China)  
Fortyfour plant species in communities of Larix chinensis in Qinling Mountain and their interspecific relationship are studied by using Fishers exact test for a 2×2 contingency table.The positive association coefficients of 33 speciespairs for the exact test are either significant or highly significant and negative association coefficients of 12 other speciespairs are significant or highly significant.In addition,Pearsons correlation coefficient and Spearmans rank correlation coefficient are applied to test for correlation between species.The correlation coefficients are calculated.Pearsons correlation coefficient shows that 31 species pairs are very significant positive covariant and 5 species pairs are very significant negative covariant.Spearmans rank correlation coefficient shows that 30 species pairs are very significant positive covariant and 5 species pairs are very significant negative covariant.The results show that the interspecific relationships of communities of Larix chinensis are simpler,but more abundant in herb layer and less in shrub layer.In arbor layer,Larix chinensis and Abies fargesii obviously show their significant negative covariation.
【Fund】: 国家自然科学基金资助项目 (30070083) ;; 陕西师范大学重点科研项目 (200024 )
【CateGory Index】: Q948
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