西北林学院学报2024，Vol.39Issue(2)：13-20,8.DOI:10.3969/j.issn.1001-7461.2024.02.02
基于结构方程模型的大兴安岭北部天然林林下草本物种多样性驱动力分析
Driving Forces of Herbaceous Species Diversity in Natural Forests in Northern Greater Khingan Mountains Based on Structural Equation Model
摘要
Abstract
Understory herbaceous plants play a very important role in the regulation of forest community structure stability and ecological function,and are an indispensable part of forest ecosystem.In this paper,the natural forests occurring in the northern Greater Khingan Mountains were taken as the research ob-jects,the structural equation model was used to study the relative importance of factors such as climate,soil and stand spatial structure on the diversity of understory herbaceous species,and the complex relation-ship between the influencing factors was discussed.Climate factors,soil factors and stand spatial structure had a strong effect on the diversity of understory herbaceous species.Among them,the influence of climate factors was the largest,followed by soil factors,and the stand spatial structure.From the perspective of mediating effect,climate change will lead to changes in soil and stand spatial structure,which will affect the diversity of understory herbaceous species.In addition,changes in stand spatial structure will also lead to changes in soil properties,which will affect the diversity of understory herbaceous species.From the per-spective of influence coefficient,the dominant factors affecting the diversity of understory herbaceous spe-cies are different due to different influencing factors.Annual average precipitation,organic carbon content and mingling degree are the dominant factors that characterize the influence of climatic factors,soil factors and stand spatial structure on the diversity of understory herbaceous species.When carrying out the protec-tion and restoration of understory herbaceous species diversity in the Greater Khingan Mountains forest ar-ea,the mingling degree can be appropriately adjusted to maintain a reasonable stand structure,and the for-est management plan for improving soil nutrients can be comprehensively considered.关键词
草本物种多样性/结构方程模型/驱动力分析/林分空间结构/大兴安岭北部Key words
herbaceous species diversity/structural equation model/driving force analysis/stand spatial structure/northern Greater Khingan Mountains分类
农业科技引用本文复制引用
王子瑞,妙文豪,呼日查,高明龙,刘磊,李岩,付宇,萨如拉..基于结构方程模型的大兴安岭北部天然林林下草本物种多样性驱动力分析[J].西北林学院学报,2024,39(2):13-20,8.基金项目
内蒙古自治区科技计划项目"大兴安岭白桦次生林生态修复关键技术研究与示范"(2020GG0067). （2020GG0067）
