草地学报 ›› 2022, Vol. 30 ›› Issue (8): 2199-2206.DOI: 10.11733/j.issn.1007-0435.2022.08.032

• 研究论文 • 上一篇    

北京山区侧柏林下草本植物多样性的影响因素分析

张林, 齐实, 周飘, 伍冰晨, 张岱, 崔冉冉, 黄宪, 马宁   

  1. 北京林业大学水土保持学院, 水土保持国家林业局重点实验室, 北京 100083
  • 收稿日期:2022-03-15 修回日期:2022-05-19 发布日期:2022-09-01
  • 通讯作者: 齐实,E-mail:qishi@bjfu.edu.cn
  • 作者简介:张林(1996-),男,江西赣州人,硕士研究生,主要从事水土保持与流域治理研究,E-mail:1822892459@qq.com
  • 基金资助:
    北京市京津风沙源治理二期工程2020年项目林业监测与评价(2020-SYZ-17JC05)

Analysis of Influencing Factors on the Understory Herbaceous Plant Diversity of Platycladus orientalis Forest in Beijing Mountainous Areas

ZHANG Lin, QI Shi, ZHOU Piao, WU Bin-chen, ZHANG Dai, CUI Ran-ran, HUANG Xian, MA Ning   

  1. School of Soil and Water Conservation, Beijing Forestry University, Key Laboratory of Soil and Water Conservation State Forestry Bureau, Beijing 100083
  • Received:2022-03-15 Revised:2022-05-19 Published:2022-09-01

摘要: 为分析和比较林分结构和环境因子对侧柏林下草本物种多样性的影响,以北京山区侧柏林为研究对象,采用多元逐步回归分析和结构方程模型解析了林分结构和环境因子与林下草本物种多样性的耦合关系。结果表明:多元线性回归显示海拔、林分密度和土壤有机质是影响林下草本Simpson多样性的主导因子,郁闭度是影响林下草本Pielou均匀度指数的主导因子,海拔是影响林下草本Margalef丰富度指数的主导因子;结构方程显示海拔和林分结构(林分密度、郁闭度)对林下草本物种多样性整体水平起主导作用,通过影响土壤养分对林下草本物种多样性产生间接影响,但直接影响起主要作用;土壤对林下草本物种多样性整体水平起重要作用,仅存在直接影响。因此,维持合理的林分密度和郁闭度是提升林下草本植物多样性整体水平的有效途径。

关键词: 侧柏林, 林分结构, 环境因子, 草本植物多样性, 结构方程模型

Abstract: In order to analyze and compare the effects of stand structure and environmental factors on the species diversity of herbaceous under Platycladus orientalis forest in the mountainous area of Beijing,the coupling relationship of forest structure,environmental factors and understory herbaceous species diversity were analyzed by multiple stepwise regression analysis and structural equation model. The results showed that:Multiple linear regression suggested that altitude,stand density and soil organic matter were the dominant factors affecting the Simpson diversity of understory herbaceous,canopy density was the vital factor affecting the Pielou evenness index of understory herbaceous,altitude was the dominant factor affecting the Margalef richness index of understory herbaceous;the structural equation showed that altitude and stand structure (stand density and canopy density) played a leading role in the overall level of understory herbaceous species diversity,which indirectly affected understory herbaceous species diversity by influencing soil nutrients,but the direct effects played a major role;soil played an important role in the overall level of understory herbaceous species diversity,and it only had a direct effects. Therefore,maintaining reasonable stand density and canopy density is an effective way to improve the overall level of understory herbaceous plant diversity.

Key words: Platycladus orientalis, Stand structure, Environmental factors, Herbaceous plant diversity, Structural equation model

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