Interspecies covariation analysis of dominant tree species in secondary succession of forest communities in Heishiding Natural Reserve,Guangdong Province

Abstract

Abstract: Based on a 2?2 contingency table,the Pearson product-moment correlation coefficient and Spearman rank correlation coefficient were used to analyses the interspecies covariation of dominant tree species in different communities of secondary succession series in Heishiding Natural Reserve,Guangdong Province.In early succession stage,14 pairs of tree species showed a significant interspecies covariation,and 9 pairs of species showed a negative coraviation,indicating that the species pairs needed the same habitats,while five pairs of species showed a positive covariation,which indicated that the species pairs needed different habitats.In the stage of needle broad-leaved mixed forest,only 5 pairs of species showed a significant interspecies covariation,and they were all positive covariation,which indicated the main species needed the same habitats and the interspecies competition were going.In the stage of evergreen broadleaved forest dominated by heliophytes,4 pairs of species showed a significant interspecies covariation,which was the least one in secondary succession series.Three pairs of them showed a positive covariation.It was the result of interspecies competition that the species pairs needed the same habitats.In the stage of evergreen broadleaved forest dominated by mesophytes,20 pairs of species showed a significant interspecies covariation,which was the most one in secondary succession series.Nineteen pairs of them showed a positive covariation.It showed positive covariation between species in upper tree layer and in middle or lower tree layer,but dominant species in upper tree layer had no significant interspecies covariation.

CLC Number:

Q948.1

ZHOU Xianye, WANG Bosun, LI Mingguang, CHEN Zhanghe . Interspecies covariation analysis of dominant tree species in secondary succession of forest communities in Heishiding Natural Reserve,Guangdong Province[J]. Chinese Journal of Applied Ecology, 2004, (3): 367-371.

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