Biogeographical diversification of mainland Asian Dendrobium (Orchidaceae) and its implications for the historical dynamics of evergreen broad-leaved forests

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	Biogeographical diversification of mainland Asian Dendrobium (Orchidaceae) and its implications for the historical dynamics of evergreen broad-leaved forests
	Xiang, Xiao-Guo ; Mi, Xiang-Cheng ; Zhou, Hai-Lang ; Li, Jian-Wu ; et al
刊名	JOURNAL OF BIOGEOGRAPHY
	2016
卷号	43 期号:7 页码:1310-1323
关键词	Biogeography Dendrobium evergreen broad-leaved forests mainland Asia molecular dating Orchidaceae
中文摘要	AimEvergreen broad-leaved forests (EBLFs) occupy most tropical and subtropical regions of mainland Asia and exhibit high species diversity, productivity and richness. Understanding the historical dynamics of EBLFs is important for biodiversity conservation and regional carbon storage and cycling under global climate change. However, little is known about the historical dynamics of EBLFs in mainland Asia. Dendrobium, an epiphytic orchid genus found in EBLFs, was used to gain new insights of the historical establishment and extension of EBLFs in mainland Asia. LocationMainland Asia. MethodsWe sampled c.80% of the currently recognized species of Dendrobium found in mainland Asia. A phylogeny was generated using maximum parsimony, maximum likelihood and Bayesian inference methods. A calibrated chronogram was obtained using a Bayesian relaxed-clock model approach. Biogeographical scenarios were investigated using the statistical dispersal-vicariance analysis and dispersal-extinction-cladogenesis methods. Ancestral states were constructed by mesquite and bayestraits, and diversification of Dendrobium was investigated by APE and LASER packages. ResultsOur results indicate that Asian Dendrobium was present on mainland Asia since the Oligocene, after which this genus diversified in this region and dispersed into higher elevations. The ancestral habit of Dendrobium was epiphytic and terrestrial and lithophytic habits each have multiple, recently independent origins. Main conclusionsOur results support the hypothesis that EBLFs have been established in mainland Asia at least since the Oligocene and further suggest that the EBLFs of mainland Asia expanded into higher elevations prior to the late Cenozoic. The diversification of Asian Dendrobium coincided with a warmer climate during the late Oligocene and middle Miocene and the expansion of key groups (including Fagaceae, Lauraceae, Magnoliaceae and Theaceae) of EBLFs during the early Cenozoic
公开日期	2016-07-25
内容类型	期刊论文
源URL	[http://ir.xtbg.org.cn/handle/353005/9977]
专题	西双版纳热带植物园_支撑系统
推荐引用方式 GB/T 7714	Xiang, Xiao-Guo,Mi, Xiang-Cheng,Zhou, Hai-Lang,et al. Biogeographical diversification of mainland Asian Dendrobium (Orchidaceae) and its implications for the historical dynamics of evergreen broad-leaved forests[J]. JOURNAL OF BIOGEOGRAPHY,2016,43(7):1310-1323.
APA	Xiang, Xiao-Guo,Mi, Xiang-Cheng,Zhou, Hai-Lang,Li, Jian-Wu,&et al.(2016).Biogeographical diversification of mainland Asian Dendrobium (Orchidaceae) and its implications for the historical dynamics of evergreen broad-leaved forests.JOURNAL OF BIOGEOGRAPHY,43(7),1310-1323.
MLA	Xiang, Xiao-Guo,et al."Biogeographical diversification of mainland Asian Dendrobium (Orchidaceae) and its implications for the historical dynamics of evergreen broad-leaved forests".JOURNAL OF BIOGEOGRAPHY 43.7(2016):1310-1323.