城市遗存山体植物群落结构与稳定性对人为干扰的响应  

Responses of plant community structure and stability to artificial disturbance in urban remnant mountains

作　　者：孙玉真 王志泰[1] 包玉[1] 刘淑萍 SUN Yuzhen;WANG Zhitai;BAO Yu;LIU Shuping(College Forestry of Guizhou University,Landscape Architecture Planning and Design Research Center,Guiyang 550025,China)

机构地区：[1]贵州大学林学院,贵州大学风景园林规划设计研究中心,贵阳550025

出　　处：《生态学杂志》2023年第8期1829-1840,共12页Chinese Journal of Ecology

基　　金：贵州省科学技术基金重点项目(黔科合基础[2020]1Z011);国家自然科学基金项目(32060367);贵州省科技支撑项目(黔科合支撑[2021]一般458)资助。

摘　　要：为探析城市遗存山体植物群落对人为干扰的响应规律,采用群落生态学与数量生态学相关理论与方法,分析了不同人为干扰方式及强度下城市遗存山体植物群落结构特征与稳定性。结果表明:(1)不同人为干扰强度下植物群落垂直结构完整性整体上呈现为轻度干扰>中度干扰>重度干扰的状态;复垦、工程开挖和工程建设均对乔灌木存在明显的负面影响,而公园化利用有利于群落垂直结构层次的完整。(2)不同干扰强度下乔木径级结构均呈倒“J”型分布,轻、中、重度干扰下的小径木(DBH<10 cm)株数分别占样地总株数的53%、58%、48%,乔木层更新潜力较高,复垦和工程开挖干扰方式下乔木径级结构表现出异常变化。(3)群落密度变异系数和Godron稳定性测度结果均显示,群落稳定性为轻度干扰>中度干扰>重度干扰;踩踏和公园化利用城市遗存山体植物群落相对较为稳定,而复垦和工程开挖植物群落最不稳定。To explore the responses of plant community of urban remnant mountains to artificial disturbance,plant community structure and stability of urban remnant mountains under different artificial disturbance ways and intensities were analyzed using the theories and methods of community ecology and quantitative ecology.The results showed that:(1)Vertical structure integrity of plant community under different intensities of human disturbance declined with increasing disturbance density.Reclamation,excavation,and construction had significant negative effects on trees and shrubs,while park utilization was beneficial to the integrity of community vertical structure.(2)The diameter class structure of trees exhibited an inverted“J”type distribution under different disturbance intensities.Small diameter trees(DBH10 cm)accounted for 53%,58%and 48%of the total individual numbers in the plots under light,moderate and heavy disturbances,respectively.The regeneration potential of tree layer was high.The diameter class structure of tree changed abnormally under reclamation and excavation disturbance ways.(3)Based on the coefficient of variation of community density and the Godron stability index,community stability decreased with human disturbance intensities.Plant communities under the disturbances of trample and park utilization were relatively stable,while those with the reclamation and engineering excavation were most unstable.

关 键 词：多山城市 残余生境 垂直结构 干扰方式 

分 类 号：Q948.1[生物学—植物学]