不同强度人为干扰对香格里拉亚高山森林树种结构的影响  

Sub-alpine forest structure resulting from human disturbances in Shangri-La County,China

作　　者：许慧敏[1] 张劲峰[2] 向红梅[1] 郭华 

机构地区：[1]西南林学院环境科学与工程系,云南昆明650224 [2]云南大学生命科学学院,云南昆明650204 [3]云南省迪庆藏族自治州林业科学研究所,云南香格里拉674400

出　　处：《浙江林学院学报》2008年第5期591-596,共6页Journal of Zhejiang Forestry College

基　　金："十五"云南省科学技术攻关项目(2003NG14);国家自然科学基金资助项目(30600080;30460035);"十五"国家科技攻关项目(2002BA901A42)

摘　　要：人为干扰对森林生态系统有着重要影响。以云南省香格里拉县尼西乡汤堆中村集体林为研究对象,采用样方调查法,研究不同强度人为干扰对香格里拉亚高山森林生态系统树种组成、重要值及群落结构的影响。结果表明,人为干扰能在一定程度上增加香格里拉亚高山森林树种多样性,但随着人为干扰强度的增加,其树种多样性又逐渐降低,群落出现断层,森林资源量减少,进而发生逆行演替,危害了森林生态系统的良性循环。建议根据当地实际,有计划地发展用材林、经济林和薪炭林,减少对森林资源的依赖,以有效保护和恢复森林植被。Human disturbance strongly impacts a forest ecosystem. We want to know the quantitative relation of the disturbance intensity and the forest structure. In this research forest tree species composition,importance values of tree species, and community structure of a subalpine forest ecosystem in Shangri-La County were studied using 12 sample plots with three types of intensities of human disturbance. Results showed that human disturbance increased tree species diversity. Moreover, with an increase in disturbance intensity, forest species diversity declined. In addition, structural fragments （no tree layer） appeared in disturbed forest communities, and stand volume decreased. Thus, succession in the forest ecosystem was being damaged, suggesting that plantations of timber forests, non-timber forest products, and fuelwood forests could be used to help mitigate the human disturbances as well as alleviate dependence on the forest resources. [Ch, 4 tab. 15 ref.]

关 键 词：森林生态学 干扰强度 亚高山 森林树种结构 树种组成 香格里拉 

分 类 号：S718.524[农业科学—林学]