Chinese Journal of Plant Ecology >
INTER-SPECIFIC CORRELATIONS AMONG DOMINANT POPULATIONS OF TREE LAYER SPECIES IN EVERGREEN BROAD-LEAVED FOREST IN JIULIANSHAN MOUNTAIN OF SUBTROPICAL CHINA
Received date: 2008-08-06
Revised date: 2009-01-14
Online published: 2009-07-30
Aims The Jiulianshan Mountain National Nature Reserve of Jiangxi is rich in typical natural evergreen broad-leaved forest communities; however, little is known about the interspecific relationships of the species that dominate the tree layer. Our objective was to investigate how the dominant species in the tree layer interact with each other and with other species.
Methods We sampled 7 600 m2 with 19 plots in the typical evergreen broad-leaved communities, selected 28 dominant species according to importance values and studied interspecific associations and correlations by using variance ratio (VR) analysis of the overall association and χ2 test, Pearson correlation coefficient test and Spearman rank correlation coefficient test based on 2×2 contingency tables of species presence/absence data.
Important findings Significantly positive correlations exist among the 28 dominant species, which suggests that the evergreen broad-leaved forest is stable. The interspecific correlations among 378 species-pairs of the 28 dominant tree species showed that 140, 104 and 144 species-pairs were positively correlated, while 238, 274 and 234 species-pairs had negative correlations, and the ratios of positive and negative correlations were 0.588, 0.380 and 0.615, based on χ2-test for 2×2 contingency table, Pearson correlation coefficient test, and Spearman rank correlation coefficient test, respectively. The Spearman rank correlation coefficient test was more sensitive than the Pearson correlation coefficient test. Most of the total 378 species pairs did not show significant association, which may be related to the seral stage of the forest and the ecological characteristics of the species. The forest was at a stable late-successional stage. According to their adaptability to the environment and relationships between plants and environment, the 28 species were divided into two ecological species groups: shade-intolerant and shade-tolerant plants.
JIAN Min-Fei, LIU Qi-Jing, ZHU Du, YOU Hai . INTER-SPECIFIC CORRELATIONS AMONG DOMINANT POPULATIONS OF TREE LAYER SPECIES IN EVERGREEN BROAD-LEAVED FOREST IN JIULIANSHAN MOUNTAIN OF SUBTROPICAL CHINA[J]. Chinese Journal of Plant Ecology, 2009 , 33(4) : 672 -680 . DOI: 10.3773/j.issn.1005-264x.2009.04.005
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