Abstract：The interspecific association and correlation of 40 native plants along the mountain roads in Yanqing County,Beijing were analyzed by using a series of parameters including variance ratio,Fisher's exact test for a 2×2 contingency table,Person's correlation coefficient and Spearman's rank correlation coefficient.The results showed that the correlations in the 40 native plants were extremely significantly positive and correlations became stages with benefiting each other.Fisher's exact test were applied to test for association between species,while the numerical changes between pair-species reflected more precisely by using Spearman's rank correlation coefficient than Pearson's correlation coefficient.Positive association coefficient s of 61 species-pairs for Spearman's rank correlation coefficient were either significant(P<0.05) or highly significant(P<0.01) and negative association coefficients were significant or highly significant in 12 other species-pairs.The 40 native plants were classified into 3 ecological species groups according to the result of Spearman's rank correlation coefficient.The result of ecological species group reflected the same or different adaptability to environment of native species,and the internal relations of interspecific relationship.
赵方莹1,2；程小琴1,2；魏东3；李林英3. 延庆县山区公路沿线主要乡土植物种间关系[J]. 中国水土保持科学, 2010, 8(5): 67-71.
DIAO Fang-Ying-；Cheng-Xiao-Qin-；Wei-Dong-；Li-Lin-Yang. Interspecific relationship of the main native plants along the mountain roads in Yanqing County,Beijing. SSWCC, 2010, 8(5): 67-71.
2010, Vol. 8 
