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中文摘要：
基于野外调查数据，对福建省长汀县石峰寨风景区桂花次生林群落36个10m×10m样方内所有高度≥1．5m且个体株数〉10的物种个体绘制空间分布图，应用最近邻体法判定每个个体的最近邻体植株，然后采用N×N最近邻体列联表的截表法研究桂花次生林群落的种问分离规律。结果表明：在14个主要树种形成的91组种对中，绝大多数种对的种问关系表现为显著正分离（占61．54％），如桂花与云山青冈、橙木与大叶桂樱、小构树与盐肤木等；其他种对表现为随机毗邻（占38．46％），如桂花与橙木、枫香与米槠、米槠与苦槠等，没有出现显著负分离种对。呈正分离的种对，可能是因为人为干扰和物种生态特性而形成的。在此基础上，应用检验法研究了桂花次生林中物种的总体分离规律。结果表明：桂花次生林中14个物种互相交错分布，是全面不分离的。同时，对群落种间联结与种问分离的关系进行分析，得出正联结的物种不一定存在着负分离的关系。
英文摘要：
In order to understand the interspecific segregation in Osmanthus fragrans forest, we investigated 36 quadrats with 10 m × 10 m and drew a distribution map of all trees with H ≥ 1.5 m and species numbers 〉 10. Based on the data, using coefficient of segregation by the subtable of the N x N nearest-neighbor contingency able, the interspecific segregations of the tree species in Osmanthus fragrans forest were studied. The result of interspecif- ic segregation indicated that the most of the species-pairs （such as Osmanthus fragrans-Cyclobalanopsis nubium, Loropetalum chinensis-Laurocerasus zippeliana, Broussonetia kazinoki-Rhus chinensis and so on）were positively seg- regated （61.54%）, only a few species-pairs（ such as Osmanthusfragrans-Loropetalum chinensis, Liquidambarfor- ＇mosana-Castanopsis carlesii, Castanopsis carlesii-Castanopsis sclerophyUa and so on ）were randomly segregated （38.46%） disturb and , no negatively segregated pairs were found. The pairs tended to be positively segregated, due to human their ecological characteristics. In addition, the overall segregated pattern in all species in the commu- nities was studiedχ2 by test based on the N x N nearest-neighbor contingency table. The result showed that 14 stud- ied species overlapped in distribution and were characterized by overall non-segregation. Meanwhile, the relation- ship between interspecific segregation and interspecific association was analyzed that the pairs with significant positive association were not negatively segregated pairs.
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