气候变化领域集成服务门户(CCPortal): Dinosaur biodiversity declined well before the asteroid impact, influenced by ecological and environmental pressures

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DOI	10.1038/s41467-021-23754-0
	Dinosaur biodiversity declined well before the asteroid impact, influenced by ecological and environmental pressures
	Condamine F.L.; Guinot G.; Benton M.J.; Currie P.J.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	The question why non-avian dinosaurs went extinct 66 million years ago (Ma) remains unresolved because of the coarseness of the fossil record. A sudden extinction caused by an asteroid is the most accepted hypothesis but it is debated whether dinosaurs were in decline or not before the impact. We analyse the speciation-extinction dynamics for six key dinosaur families, and find a decline across dinosaurs, where diversification shifted to a declining-diversity pattern ~76 Ma. We investigate the influence of ecological and physical factors, and find that the decline of dinosaurs was likely driven by global climate cooling and herbivorous diversity drop. The latter is likely due to hadrosaurs outcompeting other herbivores. We also estimate that extinction risk is related to species age during the decline, suggesting a lack of evolutionary novelty or adaptation to changing environments. These results support an environmentally driven decline of non-avian dinosaurs well before the asteroid impact. © 2021, The Author(s).
语种	英语
scopus关键词	asteroid; biodiversity; dinosaur; extinction risk; global climate; herbivore; article; biodiversity; cooling; dinosaur; global climate; herbivore; nonhuman; risk assessment; adaptation; animal; astronomy; biological model; classification; climate change; competitive behavior; dinosaur; evolution; fossil; herbivory; physiology; species extinction; Asteroidea; Dinosauria; Adaptation, Physiological; Animals; Biodiversity; Biological Evolution; Climate Change; Competitive Behavior; Dinosaurs; Extinction, Biological; Fossils; Herbivory; Minor Planets; Models, Biological
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/250663
作者单位	Institut des Sciences de l’Evolution de Montpellier (Université de Montpellier \| CNRS\|IRD\|EPHE), Montpellier, France; Department of Earth Sciences, University of Bristol, Bristol, United Kingdom; Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada
推荐引用方式 GB/T 7714	Condamine F.L.,Guinot G.,Benton M.J.,et al. Dinosaur biodiversity declined well before the asteroid impact, influenced by ecological and environmental pressures[J],2021,12(1).
APA	Condamine F.L.,Guinot G.,Benton M.J.,&Currie P.J..(2021).Dinosaur biodiversity declined well before the asteroid impact, influenced by ecological and environmental pressures.Nature Communications,12(1).
MLA	Condamine F.L.,et al."Dinosaur biodiversity declined well before the asteroid impact, influenced by ecological and environmental pressures".Nature Communications 12.1(2021).