Interspecific Association of Main Tree Populations in Pinus yunnanensis Community in Yongren Prefecture of Jinshajiang River Drainage Area
The interspecific association of 17 main tree populations in Pinus yunnanensis community in Yongren prefecture of Yunnan province were studied at 100 m2 and 400 m2 size quadrates based on 2 × 2 contingency table and different indices such as association coefficient (AC) , percentage of co - occurrence ( PC ) , point correlation coefficient ( φ) and X2 test. The results showed that the difference of interspecific association was obvious in different size quadrates. Among the 34 species - pairs of obviously positive association, there were four species - pairs only in 100 m2 size quadrates, 15 species - pairs both in 100 m2 and 400 m2 size quadrates and 16 species - pairs only in 400 m2 size quadrates. The constellation diagram showing obviously positive association of main tree populations in 400 m2 size quadrates reflected the adaptability of main tree populations to the habits just right, so the quadrates of 400 m2 could exactly display the characters of interspecific association of main tree populations in Pinus yunnanensis community.
Pinus yunnanensis communityTree populationInterspecific association
NETL
NSTL
万方数据
维普
