基于结构方程模型的大兴安岭北部天然林森林生态系统恢复能力评价研究

萨如拉; 王子瑞; 滑永春; 呼日查; 刘磊; 高明龙; 于晓雨

doi:10.12302/j.issn.1000-2006.202202029

萨如拉, 王子瑞, 滑永春, 呼日查, 刘磊, 高明龙, 于晓雨

南京林业大学学报（自然科学版） ›› 2024, Vol. 48 ›› Issue (1) : 196-204.

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南京林业大学学报（自然科学版） ›› 2024, Vol. 48 ›› Issue (1) : 196-204. DOI: 10.12302/j.issn.1000-2006.202202029

研究论文

基于结构方程模型的大兴安岭北部天然林森林生态系统恢复能力评价研究

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Evaluating forest ecosystem restoration ability of natural forest in northern Greater Khingan Mountains by a structural equation model

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摘要

【目的】探明大兴安岭北部天然林森林生态系统恢复过程中森林生态系统结构、功能、气候和立地类型因子的动态变化,筛查出关键影响因素,对其森林生态系统恢复能力进行科学评估,为探索大兴安岭天然林有效经营措施从而提升生态功能提供参考。【方法】以野外调查数据为基础,采用区分效度检验确定森林生态系统恢复能力评价指标体系,依据传导机制建立森林生态系统恢复能力评价的结构方程模型并进行指标权重确定,基于K-means聚类分析和等距划分法,建立大兴安岭森林生态系统恢复能力等级划分标准。【结果】大兴安岭森林生态系统恢复能力评价指标体系中的4个准则因子森林生产力、林分结构、气候因子、立地类型的权重分别为0.339、0.192、0.256和0.213。研究区2种森林生态系统恢复能力评价的综合分值为1.70~3.53,恢复能力等级分布符合正态分布,恢复能力等级主要集中在差、较差、良好3种状态;总体上,2种森林生态系统恢复能力等级为混交林>纯林。【结论】森林生态系统恢复能力主要受森林生产力的影响,林分结构、气候因子和立地类型对生态系统恢复能力的影响相对较小,大兴安岭部分地区的生态系统恢复能力仍然较差。混交林有利于森林生态系统恢复能力的提升,合理的林分改造措施可改善森林生态功能发挥。

Abstract

【Objective】This study aimed to investigate the dynamic changes of forest ecosystem structure, function, climate and site type factors during the restoration of natural forest ecosystems in northern Greater Khingan Mountains, screen out the key influencing factors, and use scientific methods to scientifically evaluate its forest ecosystem restoration capacity. This study provides a reference for exploring effective management measures to improve the ecological function of Greater Khingan Mountain natural forest. 【Method】Based on field survey data, discriminant validity test was used to determine the evaluation index system of forest ecosystem restoration capacity, and a structural equation model for forest ecological restoration capacity evaluation was established according to the conduction mechanism to determine the index weights. Based on K-means cluster analysis and the equidistant division method, a classification standard for the forest ecological restoration capacity in Greater Khingan Mountains was established. 【Result】The weights of four criterion factors in the evaluation index system of forest ecological restoration capacity in Greater Khingan Mountains-forest productivity, stand structure, climate factor and site type are 0.339, 0.192, 0.256 and 0.213 respectively; The comprehensive scores of the ecological restoration capacity evaluation of the two kinds of forest in the study area are in the range of 1.70 to 3.53, and the distribution of restoration capacity grades conformed to a normal distribution. The restoration capacity grades were mainly concentrated in difference, poor and good states. Overall, the ecological restoration capacity grades of the two forest types were as follows: mixed forest > pure forest. 【Conclusion】The forest ecosystem restoration capacity is mainly affected by forest productivity, whereas stand structure, climate factors and site types have relatively little impacts on ecological restoration capacity, and the ecological restoration capacity of some areas of the Greater Khingan Mountains is still poor.

导出引用

萨如拉, 王子瑞, 滑永春, 等. 基于结构方程模型的大兴安岭北部天然林森林生态系统恢复能力评价研究[J]. 南京林业大学学报（自然科学版）. 2024, 48(1): 196-204 https://doi.org/10.12302/j.issn.1000-2006.202202029

SA Rula, WANG Zirui, HUA Yongchun, et al. Evaluating forest ecosystem restoration ability of natural forest in northern Greater Khingan Mountains by a structural equation model[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2024, 48(1): 196-204 https://doi.org/10.12302/j.issn.1000-2006.202202029

中图分类号： S718.5

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