作　　者： ; ; ; ; ;

机构地区： 石河子大学生命科学学院

出　　处： 《应用与环境生物学报》 2011年第1期39-45,共7页

摘　　要： 结合野外植被调查,在获取较为详细的生境数据基础上,探讨伊犁河谷北坡野果林群落与环境因子之间的定量关系.TWINSPAN和去趋势典范对应分析(DCCA)的结果表明:1)在伊犁河谷北坡野果林群落分布地段,地形因子、养分和水分条件是群落生境的基本因子;2)海拔因子指示出研究区野果林群落最基本的分化,说明海拔条件是制约研究区植物群落分布的最重要的因子;3)土壤表层水分状况与海拔关系较密切,反映了草本层群落所受到的水分条件影响;4)养分状况的差异,除了说明生境条件本身的差异外,也在一定程度上指示了群落现在生境的养分状况,受人为的影响较大.总之,在山地复杂的地形条件下,群落生境条件的差异非常显著,海拔、土壤含水率、全氮、坡向和pH值的组合,影响并控制着研究区各群落分布格局的形成. The quantity relationship between the plant community of the wild fruit forests,which were located on the north-facing slopes of the Iri Valley,Xinjiang,China,and environment factors was discussed based on the detailed habitat data from the wild plant investigation.The results of TWINSPAN and Detrended Canonical Correspondence Analysis showed： 1） On the north-facing slopes of the Iri Valley,landform,nutrient and water were the basic factors of community habitat;2） Effect of altitude showed the basic differentiation of plant communities in research area,which indicated the altitude condition was the most important factor constraining the community distribution in northern wild fruit forests;3） The close relationship between altitude and water in soil surface reflected the water influences on herbage-layer communities;4） The nutrient differences in current community habitat implied not only the differences among factors themselves but also present nutrient conditions affected seriously by people to some extent.Above all,the environmental differences were very obvious in complicated mountain area,and the combination of altitude,soil water content,total nitrogen,slope and pH affected and controlled the community distribution of research area.

关 键 词： 伊犁河谷 野果林 群落分布格局 环境条件

领　　域： [生物学]