云南杜鹃属植物多样性的空间分布格局

Spatial Patterns of Species Diversity of Rhododendron in Yunnan, China

目的:杜鹃属(Rhododendron)植物具有极高的欣赏价值,同时,也具有一定的经济价值。因此,对该属植物多样性空间分布格局的研究具有重要的现实和理论意义。方法:利用文献资料,采用相关分析的方法,探讨了不同地理梯度上云南杜鹃属植物多样性的分布格局。结果:在海拔梯度上,随海拔的升高,该属植物多样性呈先增加后下降的偏峰分布格局,符合"中间膨胀效应"理论;在度梯度上,物种丰富度随度的升高呈单调递增格局,这可能与该属植物的区系起源和生态特性有关;在经度梯度上,从东到西,物种丰富度呈单调递增趋势。结论:研究区域内杜鹃属植物的分布主要集中在高纬度、中高海拔(2500～4000m)左右的滇北地区。

Objective：Rhododendron of Yunnan are of great importance in economy and aesthetics. Therefore, an investigation of their spatial patterns of species diversity may indicate important implication in theory and production. Methods： In this paper, spatial patterns of species diversity of Rhododendron were explored based on the information from literature, with the help of correlation analysis between species richness and different geographical dimensions. Results：The results showed that with the increase of ahitude, the species richness increased first and then decreased, showing a hump trend, which was consistent to mid-domain effects. From south to north, an increasing trend of species richness was observed, which would be consistent to their flora origin and ecological characters. From east to west, there was an increasing trend of species richness. Conclusion： Rhododendron was mainly found in the northwestern part of Yunnan with mid-high latitude and altitude.