乔木树种分布格局和林分空间结构分析
收稿日期: 2019-11-12
修回日期: 2019-12-08
网络出版日期: 2020-05-18
Analyses on Arbor Tree Species Distribution Pattern and Stand Spatial Structure
Received date: 2019-11-12
Revised date: 2019-12-08
Online published: 2020-05-18
乔木作为构成森林植被的主体,是森林生态系统稳定性的重要因素。分析林分空间结构和乔木树种分布格局对森林生态系统稳定性保护、可持续经营、营造林工程树种选择等具有重要意义。运用森林资源清查数据和植被样方专项调查数据进行聚类分析,计算树种分布格局指数和林分结构特征指数,并采用高斯分布拟合结构特征指标概率分布,旨在为森林生态系统保护和经营提供参考。结果表明,主要乔木树种分布呈聚集分布;乔木林混交度指数 Mci 离散程度大于树种空间结构 TSS 指数; TSS 指数分布呈左偏截尾正态分布, Mci 指数分布呈倒“J”型分布,指数的波动和持续稳定可能与人工营造林和天然林保护有关。
吴恒 , 朱丽艳 , 王海亮 , 刘智军 . 乔木树种分布格局和林分空间结构分析[J]. 林草资源研究, 2020 , 0(1) : 54 -61 . DOI: 10.13466/j.cnki.lyzygl.2020.01.008
Trees are an important factor in the stablity of forest ecosystem.The analysis of stand structure is of great significance to the stability protection and sustainable management of forest ecosystem.In this paper,the ninth national forest resources inventory data and special survey data of vegetation quadrat were used for cluster analysis to calculate tree species distribution pattern index and stand structure characteristic index,and the Gaussian distribution was used to fit the probability distribution of structure characteristic index,so as to provide a reference for forest ecosystem protection and management.The results show that the distribution of main tree species is clustered.The dispersion degree of arbor forest mixture index Mci is greater than that of tree species spatial structure TSS index. TSS index distribution shows the left truncated normal distribution,and the Mci index distribution shows the inverted "J" distribution.The fluctuation and continuous stability of the index may be related to artificial afforestation and natural forest protection.
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