论文部分内容阅读
锐齿栎是小陇山国家级自然保护区主要植被类型,其分布格局是判断林型恢复与否的指标之一。本文通过方差/均值、负二项参数、丛生指数、Cassie指数、聚块性指数等指标对小陇山锐齿栎种群的分布格局进行了分析。结果表明:锐齿栎现阶段年龄结构不合理,属稳定型种群;其分布格局总体属聚集分布,且聚集强度较高,随林分成熟度的升高,聚集强度逐渐下降。
Sharptooth oak is the main type of vegetation in Xiaolongshan National Nature Reserve, and its distribution pattern is one of the indicators to judge the restoration of forest type. In this paper, the distribution pattern of Quercus aliena var.mongolica population in Xiaolong Mountain was analyzed by variance / mean, negative binomial parameters, cluster index, Cassie index and polychrome index. The results showed that the age structure of Quercus serrata was unreasonable at the present stage, belonging to the stable population. The distribution pattern of the oak was generally aggregated and the aggregation intensity was high. With the maturity of the stands increasing, the aggregation intensity decreased gradually.