浙江天台山常绿阔叶林优势种群结构及种间联结性研究

以浙江天台山常绿阔叶林为研究对象 ,用“空间序列代替时间变化”的方法 ,对该群落优势种群的结构和动态进行了分析 ,结果是 :甜槠、木荷、东南石栎种群的存活曲线均表现为极显著的线性关系 ,种群的年龄结构为稳定型或增长型 ,马尾松、短柄种群的年龄结构为衰退型 ,小叶青冈种群的年龄结构由稳定型趋向衰退型。用方差比率 (VR)和通过 2× 2联列表进行 X2 检验的方法 ,检验了常绿阔叶林乔木层 2 0个主要树种、灌木层 2 2个主要种类的总体相关性和各种对间的联结性。结果是乔木层、灌木层主要种类间在总体上均呈显著的正相关 ,正联结的种对多于负联结的种对。

Studies of dominant population structure and interspecific association of the evergreen broad-leaved forest in Tiantai Mountain

The dominant population structure and developments of the evergreen broad leaved forest community in Tiantai Mountain of Zhejiang Province were analyzed by the method of spatial sere substituting for time sere. The results are as follows: the survival curves of Castanopsis eyrei, Schima superba and Lithocarpus harlandii population are obviously linear; the age structure of the population is stable or increasing; the age structure of Pinus massoniana and Quercus glandulifera var. brevipetiolata is declining; the age structure of Cyclobalanopsis gracilis is moving from being stable to being declining. The overall relatedness and interspecific association of the main 22 shrub layer species and 20 tree layer species of the evergreen broad leaved forest were examined by using variance ratio (VR) and X 2 test by 2×2 contingency table.The results show that the interspecific association of the tree layer or the shrub layer species are, on the whole, positive, and there are more paired species of positive association than those of negative association.