罗卜岩保护区闽楠种群生态学研究───优势乔木种间联结

<正>对罗卜岩闽楠（Ｐｈｏｅｂｅｂｏｕｒｎｅｉ）群落中的２３个乔木优势种群进行联结测定，应用２×２联列表，以联结系数、共同出现百分率和ｘ２统计量度量等公式计算，用相关系数ｔ－检验，从种的个体数角度分析闽楠与其它优势乔木种间联结情况。研究结果表明，罗卜岩的闽楠群落内多数优势乔木种群存在一定联结，但正联结值大的为少数，共同出现百分率较低；取样面积大

STUDY ON POPULATION ECOLOGY OF PHOEBE BOURNEI AT LUOBOYAN RESERVE IN FUJIAN CORRELATIVIn AMONG DOMINANT SPECIES

This peper deals with the analyses of correlations among 23 dominat species of Nanmu (Phoebe bournei) community at Luoboyan Reserve by means of 2 ×2 contingency table and calculation of association coefficients. percentage co-occurrence and x 2. Most associations emerge to be low. Furthermore, the authors have also analysed the association between Nanmu and other associated species by calculating the t-test of correlation coefficients. These species of peitive associations are different from those selected ones according to the association coefficient and x 2. Compared with the associations among four pairs of related species in different sample areas, the authors concluded that quadrat sizes are the most important factors effecting the result of association measurement.