Species richness and phylogenetic diversity of different growth forms of angiosperms across a biodiversity hotspot in the horn of Africa  

作　　者：Ya-Dong Zhou Biyansa Hirpo Boru Sheng-Wei Wang Qing-Feng Wang 

机构地区：[1]Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture,Wuhan Botanical Garden,Chinese Academy of Sciences,Wuhan 430074,China [2]Center of Conservation Biology,Core Botanical Gardens,Chinese Academy of Sciences,Wuhan 430074,China [3]Sino-Africa Joint Research Center,Chinese Academy of Sciences,Wuhan 430074,China [4]Ambo University,Oromia,19 Ambo,Ethiopia‘University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Journal of Systematics and Evolution》2021年第1期141-150,共10页植物分类学报（英文版）

基　　金：This study was supported by the fund of the Sino-Africa Joint Research Center,CAS,China(Y323771W07 and SAJC201322);the National Natural Science Foundation of China(31800176).

摘　　要：Woody and herbaceous plants are differentially influenced by the environment,with non-random association with the evolutionary history of these taxa and their traits.In general,woody plants may have climatedominated niches,whereas herbaceous plants may have edaphic and microhabitat-dominated niches.Here,we explored and mapped how the patterns of species richness,phylogene廿c diversity,and structures of total,woody,and herbaceous plants vary across the geographical regions and with respect to 12 environmental variables across Ethiopia and Eritrea,in the horn of Africa.Our result showed that both richness and phylogenetic diversity had almost the same tendency in total woody and herbaceous plants,in which they showed positive relationships with annual precipitation,precipitation annual range of climate,all the three variables of topography,and total nitrogen and total extractable phosphorus of soil,and negative relat:ions with mean annual temperature.Compared with the total and herbaceous plants,the environmental variables explained greater variance both in the standardized effect size phylogenetic diversity and net relatedness index for woody plants.Our results highlight that,on the large spatial scales,the environmentai filtering process has played a greater role in structuring species into local communities for woody plants than for herbaceous plants.

关 键 词：environmentai variable Ethiopia and Eritrea FLORA phylogenetic diversity woody and herbaceous 

分 类 号：Q948[生物学—植物学]