云南被子植物蔷薇分支的进化历史研究

本文以云南被子植物蔷薇分支为研究对象，基于物种间的演化关系，结合其地理分布，从进化历史的角度探讨了物种、特有种、受威胁物种的种类组成及系统发育组成的分布格局，并整合自然保护地的空间分布，对生物多样性的重点保护区域进行识别。结果显示：云南被子植物蔷薇分支的物种密度与系统发育多样性、特有种密度、受威胁物种密度均呈显著正相关，云南南部和西北部是物种丰富度与系统发育多样性最为丰富的区域；就云南整体而言，蔷薇分支的标准化系统发育多样性较低；云南南部、东南部、西北部是蔷薇分支的重点保护区域。

Evolutionary history of rosids in Yunnan angiosperms

Combining data on the distribution and phylogenetic relationships of species of rosids in Yunnan angiosperms, we explored how taxonomic composition (including species, endemic species, and threatened species) and phylogenetic diversity varied across different geographic regions. Integrating the distribution of natural protected areas with taxonomic and phylogenetic composition data, we also identified key areas for biodiversity conservation. As expected, species richness was well correlated with phylogenetic diversity and taxonomic richness of endemic and threatened species among geographic regions. Southern and northwestern Yunnan contained the highest species richness and phylogenetic diversity. Using null model analyses, the standardized effect size of phylogenetic diversity was much lower than expected based on species richness of Yunnan. We suggest that southern, southeastern, and northwestern Yunnan should be a focus for biodiversity conservation as these areas may help maximize the protection of the evolutionary history and potential of Yunnan angiosperms.