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《Guihaia》 2003-05
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Effects of habitat heterogeneity on forest community diversity in Dinghushan Biosphere Reserve

PENG Shan-jiang 1,2, HUANG Zhong-liang 1*, XU Guo-liang 1, OUYANG Xue-jun 1, ZHANG Chi 1 ( 1.Dinghushan Arboretum, South China Institute of Botany, Academia Sinica, Zhaoqing 526070, China; 2.Foshan Institute of Environmental Protection, Foshan 510650, China )  
Based on long-time investigation of permanent plot in Dinghushan Biosphere Reserve,we detected the effects of habitat heterogeneity on plant community diversity. Results indicated that diversity index showed a great difference in different forest communities that caused by variation of habitat attributes. Community diversity order correlated with topography attributes was:southern exposurenorthern exposure,lower slopemiddle slopeupper slope. Diversity index showed a tendency that value of diversity index decreased with increasing elevation,though linear correlation between them was not clear. Results of principal component analyses showed that disturbance regimes and exposure were the important factors as the first component had effects on community diversity, and its contribution is up to 42.95%. The second principal component (contribution is up to 26.24%) may reflect soil types and elevation gradient correlated with community diversity.
【Fund】: 国家自然科学基金重大项目 (39899370 ) ;; 中国科学院重大项目 (KZ95 1 -B1 -1 1 0 )资助
【CateGory Index】: Q948
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