云南樟科植物多样性的空间分布格局

Spatial Patterns of Species Diversity of Lauraceae Plants in Yunnan,China

樟科植物多样性分布格局的研究具有重要的理论意义和现实意义。本研究利用文献资料探讨了研究区域内樟科植物多样性的空间分布格局。结果表明,樟科植物物种数和属数均随着海拔的升高呈先增加后减少的偏峰分布格局。在海拔梯度上,区系分化强度也呈偏峰分布格局,分化中心可能在海拔2000m左右;在纬度梯度上,从南到北,樟科植物的物种数和属数均呈调递减趋势。区系分化强度与纬度呈负相关关系,区系分化中心可能在低纬度地区;在经度梯度上,从东到西,樟科植物的多样性呈轻微递减趋势,但区系分化强度无显著变化;总体上,研究区域内樟科植物的多样性分布中心集中在低纬度、中低海拔(海拔1500—2000m左右)的南部地区。

Spatial patterns of Lauraceae plants are of great theoretical and practical significance. In this study, spatial patterns of species diversity of Lauraceae plants in Yunnan were investigated based on literature data. The results showed that the diversity of Lauraceae plants increased, then decreased against altitudinal gradients. So is the altitudinal patterns of strength of species division on the latitude gradient, from south to north, the diversity of Lauraceae plants decreased, and so is the specification strength. On longitude gradient, from east to west, there is a slight trend of diversity of Lauraceae plants, and no obvious trend was observed on specification strength. In general, the distribution center of Lauraceae plants is in the southern part of the study area with low latitude and altitude （elevation 1500--2000 m or so）.