中国特有植物短丝木犀(Osmanthus serrulatus Rehd.)群落结构及其环境解释  

Analysis of community structure of Osmanthus serrulatus based on TWINSPAN classification and DCCA sequencing

作　　者：杨国栋[1,2] 钱慧蓉 陈林[1,2] 王贤荣[1,2] YANG Guodong1,2,QIAN Huirong1,2,CHEN Lin1,2,WANG Xianrong1,2(1 Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China; 2 College of Biological Environment, Nanjing Forestry University, Nanjing 210037, Chin)

机构地区：[1]南京林业大学南方现代林业协同创新中心,南京210037 [2]南京林业大学生物环境学院,南京210037

出　　处：《生态学报》2018年第9期3059-3068,共10页Acta Ecologica Sinica

基　　金：国家自然科学基金项目(31300558);江苏省基础研究计划项目(BK20130972);江苏省高校优势学科建设工程资助项目(PAPD);南京林业大学高学历人才基金项目(GXL201308)

摘　　要：为了解环境因子对短丝木犀植物群落的影响,研究了四川省宝兴县东拉山短丝木犀植物群落地区的环境因子、TWINSPAN分类、物种和多样性指数与环境因子的DCCA排序。结果表明:1)TWINSPAN将东拉山短丝木犀24个植物群落里划分为12个群落类型,分类结果在空间上反映了东拉山植物群落的演替变化趋势。2)短丝木犀植物群落生长在土壤含水量较高、郁闭度较高,并处于西南和南坡向的沟边。短丝木犀群落的主要伴生物种为鹅耳枥Carpinus turczaninowii、宝兴木姜子Litsea moupinensis、领春木Euptelea pleiosperma、云锦杜鹃Rhododendron fortunei、宝兴过路黄Lysimachia baoxingensis、糙苏Phlomis umbrosa和铁角蕨Asplenium trichomanes。3)DCCA排序结果验证了TWINSPAN分类结果的合理性,同时指出影响东拉山短丝木犀植物群落类型及空间分布的重要环境因子是土壤有机质和腐殖质含量。Plant community classification and ordination categorizes plant communities according to characteristics or attributes,and is an important means of analyzing the ecological relationship between vegetation and the environment. This is the most basic,but complicated research content in vegetation ecology. The western Sichuan region is dominated by mountainous and plateau geomorphology. The complex and unique natural and geographical condition of this area results in an abundance of plant species. However,they are exceedingly difficult to classify because of complex environmental conditions and the rich number of species. To understand the effect of environmental factors on the Osmanthus serrulatus plant community,this study investigated the environmental factors,TWINSPAN classification,species and diversity index,and environmental factors of Detrended Canonical Correspondence Analysis（ DCCA） in the community region of Osmanthus serrulatus in the Dongla Mountain,Baoxing County,Sichuan Province. Because the DCCA ordination axe for clustering and classification combines vegetation and environmental factors,it can properly express the environmental and structural gradient of the plant community,which reflects the spatial variation of the environment and its structure. In this study,theclassification and ordination of the Osmanthus serrulatus community in western Sichuan mountain regions was performed in order to lay a foundation for further analysis of the biodiversity pattern and maintenance mechanism of the fragmented and crushed habitat of the Osmanthus serrulatus community. The results showed that： 1） 24 community plots were divided into 12 coenotypes by TWINSPAN,which revealed the community successional trend in space. 2） Osmanthus serrulatus were distributed in the southwest and south slopes of the ditch,which had higher soil moisture levels and canopy densities,and coexisted with Carpinus turczaninowii, Litsea moupinensis, Euptelea pleiosperma, Rhododendron fortunei, Lysimachia baoxingensis,Phlomis umb

关 键 词：群落 DCCA排序 环境因子 短丝木犀 TWINSPAN分类 

分 类 号：Q948[生物学—植物学]