摘要
传统植物区系地理学研究主要以植物区系的分类群组成及其分布区类型的分析为主,忽视了进化历史的分析。本文根据前期云南植物区系的分区研究,基于云南种子植物1,983个属的系统发育关系,结合其地理分布,从进化历史的角度分析不同地理单元的分类群组成、系统发育组成及其相似性,探讨各个地理单元的系统发育结构及地理单元间的系统发育相似性。结果表明:云南植物区系不同地理单元的系统发育多样性与科或属的丰富度显著相关,其系统发育结构为非随机型;不同地理单元间的系统发育组成相似性与分类群组成相似性显著相关,二者的聚类分析均表明具有热带植物区系性质的地理单元与具有温带植物区系性质的地理单元各自聚为一类。由此可见,融合进化历史信息的植物区系分析有助于更加深入地理解植物区系的性质和来源。
Traditional attempts of floristic studies typically focus on the analyses of taxonomic composition and areal-types of flora, often ignoring the rich context that evolutionary history can provide. In this study, based on the recent study examining the delineation of floristic regions in Yunnan, by combining data on the distributions and phylogenetic relationships of 1,983 genera of native seed plants, we explore how taxonomic composition, phylogenetic relatedness, and phylogenetic structure vary across the different geographic regions in this area. As predicted, phylogenetic diversity was well correlated with taxonomic diversity among the geo- graphic regions. Using null model analyses, we found evidence of nonrandom phylogenetic structure across the region. Also, phylogenetic relatedness was well correlated with taxonomic composition between geo- graphic regions in Yunnan. Cluster analyses of the similarities of phylogenetic relatedness and taxonomic composition show that geographic regions with tropical floristic affinity form a single cluster separate from another cluster composed of geographic regions with temperate floristic affinity. Our results show that the in- tegration ofphylogenetic information can help us to better understand the characteristics and origin of flora.
出处
《生物多样性》
CAS
CSCD
北大核心
2017年第2期195-203,共9页
Biodiversity Science
基金
国家自然科学基金(31370243,31570212)
云南省应用基础研究计划(2014FB169)
云南省中青年学术技术带头人后备人才培养计划(2015HB092)
作者简介
通讯作者Authorforcorrespondence．E-mail：lirong@mail．kibac．cn
