Pre- versus post-mass extinction divergence of Mesozoic marine reptiles   dictated by time-scale dependence of evolutionary rates

doi:10.1098/rspb.2017.0241

CORC > 北京大学 > 地球与空间科学学院

	Pre- versus post-mass extinction divergence of Mesozoic marine reptiles dictated by time-scale dependence of evolutionary rates
	Motani, Ryosuke ; Jiang, Da-yong ; Tintori, Andrea ; Ji, Cheng ; Huang, Jian-dong
刊名	PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
	2017
关键词	Bayesian morphological clock divergence time time-scale dependence Mesozoic marine reptile end-Permian mass extinction MOLECULAR EVOLUTION INFERENCE DIVERSIFICATION PHYLOGENIES AFTERMATH MRBAYES FISHES LIFE
DOI	10.1098/rspb.2017.0241
英文摘要	The fossil record of a major Glade often starts after a mass extinction even though evolutionary rates, molecular or morphological, suggest its pre-extinction emergence (e.g. squamates, placentals and teleosts). The discrepancy is larger for older clades, and the presence of a time-scale-dependent methodological bias has been suggested, yet it has been difficult to avoid the bias using Bayesian phylogenetic methods. This paradox raises the question of whether ecological vacancies, such as those after mass extinctions, prompt the radiations. We addressed this problem by using a unique temporal characteristic of the morphological data and a high-resolution stratigraphic record, for the oldest Glade of Mesozoic marine reptiles, Ichthyosauromorpha. The evolutionary rate was fastest during the first few million years of ichthyosauromorph evolution and became progressively slower over time, eventually becoming six times slower. Using the later slower rates, estimates of divergence time become excessively older. The fast, initial rate suggests the emergence of ichthyosauromorphs after the end-Permian mass extinction, matching an independent result from high-resolution stratigraphic confidence intervals. These reptiles probably invaded the sea as a new ecosystem was formed after the end-Permian mass extinction. Lack of information on early evolution biased Bayesian clock rates.; National Geographic Society Committee for Research and Exploration [8669-09]; National Natural Science Foundation of China [40920124002, 41372016]; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS) [123102]; Ministry of Land and Resources of China [201511054]; SCI(E); ARTICLE; 1854; 284
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/473377]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Motani, Ryosuke,Jiang, Da-yong,Tintori, Andrea,et al. Pre- versus post-mass extinction divergence of Mesozoic marine reptiles dictated by time-scale dependence of evolutionary rates[J]. PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES,2017.
APA	Motani, Ryosuke,Jiang, Da-yong,Tintori, Andrea,Ji, Cheng,&Huang, Jian-dong.(2017).Pre- versus post-mass extinction divergence of Mesozoic marine reptiles dictated by time-scale dependence of evolutionary rates.PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES.
MLA	Motani, Ryosuke,et al."Pre- versus post-mass extinction divergence of Mesozoic marine reptiles dictated by time-scale dependence of evolutionary rates".PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES (2017).