重庆地区毛竹分株种群结构特征研究

Studies on the Ramet Population Structure of the Clonal Moso Bamboo in Chongqing

调查了重庆永川茶山竹海景区内三种典型群落中毛竹分株种群,对其大小结构(株高、基径等)、年龄结构及分布特征进行对比研究。结果表明:(1)分株水平上,毛竹大小结构在三类群落中均有显著差异(P<0.05),其平均高度及基径均为毛竹-针叶混交林<毛竹纯林<毛竹-阔叶混交林,这与毛竹分株种群在不同群落类型中微环境的异质性相关;(2)三类群落中,毛竹种群均呈集群分布,聚集强度的差异性反映了毛竹的生物学特性和所处生境条件的综合影响。

Moso bamboo, a typical clonal plant, is a monopodial bamboo species native to subtropical China. The impacts of different community conditions on its ramet population structure were surveyed in pure bamboo forest （PB）, bamboo-conifer mixed forest （BC） and bamboo- broadleaved tree mixed forest （BB） at the Tea Field and Bamboo Sea Scenic Spot of Chongqing. The results showed that at the ramet level, the size structures of the three ramet populations were significantly different （P〈0.05）, and the mean height and basal diameter of the populations increased in the order of BC〈 PB〈BB. The spatial analyses revealed that all ramets in different plots were nearly clumped at varied spatial scales, which was caused by not only the biological characters of Moso bamboo but also community environments under concern.