运用种间联结分析濒危植物白桂木在群落中的地位

在2×2联列表的基础上,运用2χ检验和联结系数(AC)调查并分析了白桂木(Artocarpus hypargyreusHance)在5个分布点与群落中的乔、灌木树种的种间联结.结果表明:2χ检验和联结系数(AC)测定的结果基本一致,白桂木与群落中的其它树种不存在显著关联,与其它树种的2χ值都小于3.841,与大多数树种的AC值在-0.2-0.2之间,说明白桂木在群落中具有较大的独立性和随机性,只是群落中的伴生种或偶见种.

Community studies on the status of the endangered plant, Artocarpus hypargyreus Hance, using inter-specific association analysis

Based on 2×2 contingency tables,the inter-specific correlation of Artocarpus hypargyreus Hance in the tree layers and shrub layers with other species in 5 different communities were studied by using χ2 test and association coefficient(AC).The results showed that the inter-specific correlations of Artocarpus hypargyreus Hance to other species were very similar in each of the 5 sites,there was no relationship between Artocarpus hypargyreus Hance and other species,the values of χ2 between Artocarpus hypargyreus Hance and other species were all lower than 3.841,the highest values of AC were-0.2-0.2.All of the above results implied that Artocarpus hypargyreus Hance was distributed independently and had random occurrence in the different communities,and it was an incidental and rare species.