华木莲群落种间联结性研究

通过方差分析、χ2检验和共同出现百分率PC等的计算,对华木莲SinomanglietiaglaucaZ.X.YuetQ.Y.Zheng分布的群落中60个主要树种间的联结性进行了定量分析。研究结果表明:华木莲分布的群落总体种间关联性为显著正相关;236个种对呈显著正联结,44个种对为显著负联结,PC≥60%有28对,40%≤PC<60%有121对,20%

Studies on Interspecific Association of Communities with Sinomanglietia glauca

Sinomanglietia glauca, an endangered plant of Magnoliaceae, is endemic to China. It only distributes in Mingyue Mountain of Yichun City, Jiangxi Province. A series of techniques including the analysis of variance, relative tests and calculation of the percentage of co-occurrence were used to analyze the interspecific association among 60 dominant woody species in the communities with S. glauca. The results show the overall association of all species in the communities is significantly positive. 236 species pairs are of significantly positive association and 44 species pairs are of significantly negative association. 1770 species pairs were checked by the percentage of co-occurrence, among them, 28 species pairs are over 60%, 121 species pairs range from 40% to 60%, 446 species pairs range from 20% to 40%, and the others (1175 species pairs) are less than 20%. The association between S. glauca and the dominant woody species in miscellaneous tree forest community is highly positive, while the association between S. glauca and Phyllostachys edulis is relatively independent. On the whole, the miscellaneous tree forest community is a relatively suitable habitat for S. glauca, where the association of all species is close, and the dominant woody species are co-dominant. Finally, in order to afford more suitable habitat for S. glauca, the effective measures which should be taken are as follows: reducing the invasion of Phyllostachys edulis, restoring and expanding the broad-leaved forest.