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中文摘要：
选择浙江和安徽两地的银缕梅（Parrotia subaequalis）种群为研究对象，以空间序列代替时间变化的方法研究银缕梅种群结构，采用方差／均值比的t检验法进行分布格局的判定，并结合丛生指数（I）、负二项参数（K）、Cassie指数（CA）和聚块性指数（IPA）分析聚集度。结果表明，银缕梅种群分布格局表现为由低龄级的集群分布向高龄级的随机分布过渡的趋势，但总体上呈集群分布，这主要与银缕梅种群的萌蘖繁殖方式、种内自疏及生境异质性有关。对种群龄级结构、种群存活曲线和静态生命表的分析，均反映出银缕梅种群结构波动性较大，稳定性差，更新能力不足，为衰退型种群。
英文摘要：
The population structure of Parrotia subaequalis in Zhejiang and Anhui Province was analyzed by the method of spatial sere for time sere. By means of t-test of variance/mean value ratio, and four other aggregation intensity indexes, in- cluding I, K, CA, IpA , the spatial distribution pattern and dynamics of Parrotia subaequalis were studied. The results indi- cate that in terms of spatial distribution this species changes from aggregation to random distribution in the same process of seedlings to trees. However, aggregation distribution is the dominant in the plots. The reasons may be primarily the repro- duction of sprouting, self-thinning, and habitat heterogeneity. According to the results of analysis of its population struc- ture, survival cmwe, and static life table, the P. subaequalis population is generally declining type, and fluctuates, with poor stability and low ability to regenerate in the wild.
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