Global patterns of Rhododendron diversity: The role of evolutionary time and diversification rates

doi:10.1111/geb.12750

CORC > 植物研究所 > 中国科学院植物研究所 > 植被与环境变化国家重点实验室

	Global patterns of Rhododendron diversity: The role of evolutionary time and diversification rates
	Shrestha, Nawal 2; Wang, Zhiheng 2; Su, Xiangyan 2; Xu, Xiaoting 2,7; Lyu, Lisha 2,3; Liu, Yunpeng 2; Dimitrov, Dimitar 4; Kennedy, Jonathan D.; Wang, Qinggang 2; Tang, Zhiyao 2
刊名	GLOBAL ECOLOGY AND BIOGEOGRAPHY
	2018
卷号	27 期号:8 页码:913-924
关键词	ancestral area reconstruction evolutionary history habitat heterogeneity into-the-tropics species richness time-for-speciation tropical mountains
ISSN号	1466-822X
DOI	10.1111/geb.12750
文献子类	Article
英文摘要	Aim: Understanding the evolution of the latitudinal diversity gradient (i.e. increase in species diversity towards the tropics) is a prominent issue in ecology and biogeography. Disentangling the relative contributions of environment and evolutionary history in shaping this gradient remains a major challenge because their relative importance has been found to vary across regions and taxa. Here, using the global distributions and a molecular phylogeny of Rhododendron, one of the largest genera of flowering plants, we aim to compare the relative contributions of contemporary environment, evolutionary time and diversification rates in generating extant species diversity patterns. Location: Global. Time period: Undefined. Major taxa studied: Rhododendron. Methods: We compiled the global distributions of all Rhododendron species, and constructed a dated molecular phylogeny using nine chloroplast genes and seven nuclear regions. By integrating these two datasets, we estimated the temporal trends of Rhododendron diversification, and explored the global patterns of its species diversity, net diversification rates, and species ages. Next, we reconstructed the geographical ancestral area of the clade. Finally, we compared the relative contribution of contemporary environment, time-for-speciation, and diversification rates on the species diversity pattern of Rhododendron. Results: In contrast to the predictions of the time-for-speciation hypothesis, we found that although Rhododendron originated at a temperate latitude, its contemporary species diversity is highest in the tropics/subtropics, suggesting an into-the-tropics colonization for this genus. We found that the elevated diversification induced by heterogeneous environmental conditions in the tropics/subtropics shapes the global pattern of Rhododendron diversity. Main conclusions: Our findings support tropical and subtropical mountains as not only biodiversity and endemism hotspots, but also as cradles for the diversification of Rhododendron. Our study emphasizes the need of unifying ecological and evolutionary approaches in order to gain comprehensive understanding of the mechanisms underlying the global patterns of plant diversity.
学科主题	Ecology ; Geography, Physical
电子版国际标准刊号	1466-8238
出版地	HOBOKEN
WOS关键词	SPECIES RICHNESS PATTERNS ; HISTORICAL BIOGEOGRAPHY ; ENVIRONMENTAL HETEROGENEITY ; LATITUDINAL DIVERSITY ; NICHE CONSERVATISM ; DISPERSAL ; PHYLOGENY ; GRADIENT ; CLIMATE ; SPECIATION
语种	英语
出版者	WILEY
WOS记录号	WOS:000442582200003
资助机构	National Key Research Development Program of China [2017YFA0605101] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31650110471, 31522012, 31470564, 31621091] ; 111 ProjectMinistry of Education, China - 111 Project [B14001] ; Chinese Academy of Sciences-Peking University Pioneer Collaboration Team ; Fundamental Research Funds for Central UniversitiesFundamental Research Funds for the Central Universities [YJ201721] ; Danish National Research FoundationDanmarks Grundforskningsfond [DNRF96]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/20418]
专题	植被与环境变化国家重点实验室
作者单位	1.Univ Oslo, Nat Hist Museum, Oslo, Norway 2.Peking Univ, Inst Ecol, Beijing 100871, Peoples R China 3.Sichuan Univ, Coll Life Sci, Chengdu, Sichuan, Peoples R China 4.Peking Univ, Shenzhen Grad Sch, Sch Urban Planning & Design, Shenzhen, Peoples R China 5.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing, Peoples R China 6.Peking Univ, Key Lab Earth Surface Proc, Minist Educ, Coll Urban & Environm Sci, Beijing 100871, Peoples R China 7.Wang, Zhiheng; Dimitrov, Dimitar; Kennedy, Jonathan D.] Univ Copenhagen, Ctr Macroecol Evolut & Climate, Nat Hist Museum Denmark, Copenhagen, Denmark
推荐引用方式 GB/T 7714	Shrestha, Nawal,Wang, Zhiheng,Su, Xiangyan,et al. Global patterns of Rhododendron diversity: The role of evolutionary time and diversification rates[J]. GLOBAL ECOLOGY AND BIOGEOGRAPHY,2018,27(8):913-924.
APA	Shrestha, Nawal.,Wang, Zhiheng.,Su, Xiangyan.,Xu, Xiaoting.,Lyu, Lisha.,...&Feng, Xiaojuan.(2018).Global patterns of Rhododendron diversity: The role of evolutionary time and diversification rates.GLOBAL ECOLOGY AND BIOGEOGRAPHY,27(8),913-924.
MLA	Shrestha, Nawal,et al."Global patterns of Rhododendron diversity: The role of evolutionary time and diversification rates".GLOBAL ECOLOGY AND BIOGEOGRAPHY 27.8(2018):913-924.