论文部分内容阅读
本文分别采用棋盘格子样方法和距离法取样,用3种检验方法对中国沙棘6个种群的分布格局作了研究,目的是相互验证其结果,以便客观地揭示种群在各自的群落中水平空间结构的分布规律。研究结果表明沙棘幼龄林的分布具有一定程度的集群性,并向典型的集群分布格局过渡。进入生殖期后的沙棘纯林,种群呈典型的集群分布格局。随着其它种群的入侵,沙棘种群偏离了集群分布,向均匀性较高的随机分布过渡。不同的测定和检验方法会导致不同的结论,需几种方法相互验证,并结合种群特性及生境情况进行综合分析,才能做出较为准确的判断,样方面积对检验结果有影响。
In this paper, we use the checkerboard method and the distance method to sample the three kinds of test methods to study the distribution patterns of six seabuckthorn populations in China. The purpose is to verify the results of each other in order to objectively reveal the horizontal spatial structure of the populations in their communities The distribution of law. The results showed that the distribution of young seabuckthorn trees had some degree of clustering and transition to the typical cluster distribution pattern. Into the pure sea buckthorn after the reproductive period, the population showed a typical cluster distribution pattern. With the invasion of other populations, the seabuckthorn population deviated from the cluster distribution and transitioned to a random distribution with high homogeneity. Different measurement and test methods can lead to different conclusions. Several methods are required to verify each other and a comprehensive analysis based on population characteristics and habitat conditions can be made to make more accurate judgments. Sample area has an impact on the test results.