| 以下仅列出文章摘要、目录等部分内容，如需获取完整论文资料，或原创定制、长期合作，请随时联系。 微信QQ:312050216 |
 |
 |
| 秦岭松栎林植物功能多样性特征的环境解释
摘要：该研究以陕西省秦岭山脉中段的松栎林群落为对象进行研究调查，通过计算乔木层、灌木层的5项功能多样性指数并进行冗余分析，旨在探究环境因子（土壤、地形等）对群落功能多样性的影响。结果表明：（1）环境因子对群落乔木层和灌木层的功能多样性影响有显著的差异。影响乔木层的主要是土壤全氮含量和坡位。坡位与FRic指数呈密切正相关，与Rao 指数、FEve指数和FDis指数均呈较大负相关;土壤全氮与Rao指数、FEve指数、和FDis指数均呈密切正相关。（2）影响灌木层的是土壤pH和海拔。海拔与FRic指数呈密切负相关，pH值与Rao指数、FEve指数、FDis指数和FDiv指数都是呈密切负相关。本研究有利于揭示影响群落不同层次功能多样性的关键环境因子，筛选出这些环境因子，可以有效地保护和管理秦岭地区的植物资源，还可以为提高该生态系统抵御干扰能力提供理论指导。
关键词：环境因子；功能离散度；功能丰富度；功能均匀度；秦岭
Abstract: In this study,the pine oak forest community in the middle part of Qinling Mountains in Shaanxi Province was investigated. Five functional diversity indexes of tree layer and shrub layer were calculated and redundancyanalysis was carried out to explore the impact of environmental factors (soil, topography, etc.) on community functional diversity.The results showed that: (1) the effects of environmental factors on the functional diversity of tree layer and shrub layer were significantly different. Soil total nitrogen content and slope position were the main factors affecting tree layer.Slope position was positively correlated with fric index,and negatively correlated with Rao index,FEVE index and FDIS index; soil total nitrogen was positively correlated with Rao index, FEVE index and FDIS index. (2) Soil pH and altitude affected the shrub layer.Altitude was negatively correlated with fric index,and pH was negatively correlated with Rao index, FEVE index, FDIS index and fdiv index. This study is helpful to reveal the key environmental factors that affect the functional diversity of communities at different levels, and screen out these environmental factors,which can effectively protect and manage the plant resources in Qinling Mountains,and also provide theoretical guidance for improving the ability of the ecosystem to resist interference.
Key words: Environmental factors; functional dispersion;functional richness; functional evenness; Qinling Mountains
|
