Monsoon intensification in East Asia triggered the evolution of its flora

doi:10.3389/fpls.2022.1046538

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	Monsoon intensification in East Asia triggered the evolution of its flora
	Ye, Jun-Wei; Tian, Bin; Li, De-Zhu
	2022
发表期刊	FRONTIERS IN PLANT SCIENCE
卷号	13 页码:1046538
摘要	IntroductionEast Asia (EA), which falls within the region of the Asian monsoon that is composed of the East Asia monsoon (EAM) and the Indian monsoon (IM), is known for its high species diversity and endemism. This has been attributed to extreme physiographical heterogeneity in conjunction with climate and sea-level changes during the Pleistocene, this hypothesis has been widely proven by phylogeographic studies. Recently, dated phylogenies have indicated that the origins (stem age) of the flora occurred after the Oligocene-Miocene boundary and are related to the establishment of the EAM. MethodsHence, this study further examined whether the strengthening of the monsoons triggered floral evolution via a meta-analysis of the tempo-spatial pattern of evolutionary radiation dates (crown ages) of 101 endemic seed plant genera. ResultsTaxonomic diversification began during the late Eocene, whereas the accumulated number of diversifications did not significantly accelerate until the late Miocene. The distribution of the weighted mean and the average divergence times in the EAM, IM, or transitional regions all fall within the mid-late Miocene. Fossils of the Tertiary relict genera are mostly and widely distributed outside EA and only half of the earliest fossils in the EA region are not older than Miocene, while their divergence times are mostly after the late Miocene. The pattern of divergence time of monotypic and polytypic taxa suggest the climatic changes after the late Pliocene exert more influence on monotypic taxa. DiscussionThe two key stages of floral evolution coincide with the intensifications of the EAM and IM, especially the summer monsoon which brings a humid climate. An integrated review of previous studies concerning flora, genus, and species levels further supports our suggestion that monsoon intensification in EA triggered the evolution of its flora.
关键词	east asian monsoon endemism late miocene pleistocene tertiary relict SOUTH CHINA SEA MOLECULAR PHYLOGEOGRAPHY SUBTROPICAL CHINA TEMPERATE PLANTS RELICT PLANTS HISTORY INSIGHTS DIVERSIFICATION BIODIVERSITY DIVERSITY
DOI	10.3389/fpls.2022.1046538
收录类别	SCI
WOS记录号	WOS:000894361800001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/75634
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Ye, Jun-Wei,Tian, Bin,Li, De-Zhu. Monsoon intensification in East Asia triggered the evolution of its flora[J]. FRONTIERS IN PLANT SCIENCE,2022,13:1046538.
APA	Ye, Jun-Wei,Tian, Bin,&Li, De-Zhu.(2022).Monsoon intensification in East Asia triggered the evolution of its flora.FRONTIERS IN PLANT SCIENCE,13,1046538.
MLA	Ye, Jun-Wei,et al."Monsoon intensification in East Asia triggered the evolution of its flora".FRONTIERS IN PLANT SCIENCE 13(2022):1046538.

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