气候变化领域集成服务门户(CCPortal): A global phylogeny of turtles reveals a burst of climate-associated diversification on continental margins

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DOI	10.1073/pnas.2012215118
	A global phylogeny of turtles reveals a burst of climate-associated diversification on continental margins
	Thomson R.C.; Spinks P.Q.; Bradley Shaffer H.
发表日期	2021
ISSN	00278424
卷号	118 期号:7
英文摘要	Living turtles are characterized by extraordinarily low species diversity given their age. The clade’s extensive fossil record indicates that climate and biogeography may have played important roles in determining their diversity. We investigated this hypothesis by collecting a molecular dataset for 591 individual turtles that, together, represent 80% of all turtle species, including representatives of all families and 98% of genera, and used it to jointly estimate phylogeny and divergence times. We found that the turtle tree is characterized by relatively constant diversification (speciation minus extinction) punctuated by a single threefold increase. We also found that this shift is temporally and geographically associated with newly emerged continental margins that appeared during the Eocene−Oligocene transition about 30 million years before present. In apparent contrast, the fossil record from this time period contains evidence for a major, but regional, extinction event. These seemingly discordant findings appear to be driven by a common global process: global cooling and drying at the time of the Eocene−Oligocene transition. This climatic shift led to aridification that drove extinctions in important fossil-bearing areas, while simultaneously exposing new continental margin habitat that subsequently allowed for a burst of speciation associated with these newly exploitable ecological opportunities. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Turtle tree of life \| divergence time estimation \| GeoSSE \| HiSSE \| global climate change
语种	英语
scopus关键词	article; cooling; Eocene; fossil; global climate; habitat; mass extinction; nonhuman; Oligocene; species differentiation; time perception; tree of life; turtle
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180603
作者单位	School of Life Sciences, University of Hawaii, Honolulu, HI 96822, United States; Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA 90095, United States; La Kretz Center for California Conservation Science, Institute of the Environment and Sustainability, University of California, Los Angeles, CA 90095, United States
推荐引用方式 GB/T 7714	Thomson R.C.,Spinks P.Q.,Bradley Shaffer H.. A global phylogeny of turtles reveals a burst of climate-associated diversification on continental margins[J],2021,118(7).
APA	Thomson R.C.,Spinks P.Q.,&Bradley Shaffer H..(2021).A global phylogeny of turtles reveals a burst of climate-associated diversification on continental margins.Proceedings of the National Academy of Sciences of the United States of America,118(7).
MLA	Thomson R.C.,et al."A global phylogeny of turtles reveals a burst of climate-associated diversification on continental margins".Proceedings of the National Academy of Sciences of the United States of America 118.7(2021).