Alpine speciation and morphological innovations: revelations from a species-rich genus in the northern hemisphere

doi:10.1093/aobpla/plab018

KIB OpenIR

	Alpine speciation and morphological innovations: revelations from a species-rich genus in the northern hemisphere
	Zhang,Yazhou ; Chen,Jianguo ; Sun,Hang
	2021
发表期刊	AOB PLANTS
ISSN	2041-2851
卷号	13 期号:3 页码:plab018
摘要	A large number of studies have attempted to determine the mechanisms driving plant diversity and distribution on a global scale, but the diverse and endemic alpine herbs found in harsh environments, showing adaptive evolution, require more studies. Here, we selected 466 species from the genus Saussurea, one of the northern hemisphere's highest-altitude plant genera with high species richness and striking morphological traits, to explore the mechanisms driving speciation and adaptative evolution. We conducted phylogenetic signals analysis and ancestral character estimation to explore the phylogenetic significance of ecological factors. Moreover, we used spatial simultaneous autoregressive (SAR) error models, modified t-tests and partial regression models to quantify the relative effects of ecological factors and morphological diversity upon diversity and endemism of Saussurea. Phylogenetic analyses reveal that geological influences and climate stability exhibit significant phylogenetic signals and that Saussurea originated at a relatively high elevation. Regression models indicate that geological influences and climatic stability significantly affect the diversity and endemism patterns of Saussurea and its morphological innovations. Moreover, morphological innovations in an area show significant contributions to the local diversity and endemism of Saussurea. We conclude that geological influences (mean altitude and topographic heterogeneity), glacial-interglacial climate stability and phylogenetic conservatism have together promoted the speciation and adaptive evolution of the genus Saussurea. In addition, adaptively morphological innovations of alpine species also promote diversification in local regions. Our findings improve the understanding of the distribution pattern of diversity/endemism and adaptive evolution of alpine specie in the whole northern hemisphere.
关键词	Adaptive evolution alpine speciation diversity endemism morphological innovations Saussurea HENGDUAN MOUNTAINS EVOLUTIONARY HISTORY PLANT DIVERSITY MOLECULAR PHYLOGENY CLIMATE-CHANGE BIOGEOGRAPHY DIVERSIFICATION ENDEMISM BIODIVERSITY PATTERNS
DOI	10.1093/aobpla/plab018
WOS记录号	WOS:000656150400001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/73757
专题	中国科学院昆明植物研究所
作者单位	1.Chinese Acad Sci, Kunming Inst Bot, CAS Key Lab Plant Biodivers & Biogeog East Asia, 132 Lanhei Rd, Kunming 650201, Yunnan, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang,Yazhou,Chen,Jianguo,Sun,Hang. Alpine speciation and morphological innovations: revelations from a species-rich genus in the northern hemisphere[J]. AOB PLANTS,2021,13(3):plab018.
APA	Zhang,Yazhou,Chen,Jianguo,&Sun,Hang.(2021).Alpine speciation and morphological innovations: revelations from a species-rich genus in the northern hemisphere.AOB PLANTS,13(3),plab018.
MLA	Zhang,Yazhou,et al."Alpine speciation and morphological innovations: revelations from a species-rich genus in the northern hemisphere".AOB PLANTS 13.3(2021):plab018.