气候变化领域集成服务门户(CCPortal): Decreasing Phanerozoic extinction intensity as a consequence of Earth surface oxygenation and metazoan ecophysiology

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DOI	10.1073/pnas.2101900118
	Decreasing Phanerozoic extinction intensity as a consequence of Earth surface oxygenation and metazoan ecophysiology
	Stockey R.G.; Pohl A.; Ridgwell A.; Finnegan S.; Sperling E.A.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:41
英文摘要	The decline in background extinction rates of marine animals through geologic time is an established but unexplained feature of the Phanerozoic fossil record. There is also growing consensus that the ocean and atmosphere did not become oxygenated to near-modern levels until the mid-Paleozoic, coinciding with the onset of generally lower extinction rates. Physiological theory provides us with a possible causal link between these two observations—predicting that the synergistic impacts of oxygen and temperature on aerobic respiration would have made marine animals more vulnerable to ocean warming events during periods of limited surface oxygenation. Here, we evaluate the hypothesis that changes in surface oxygenation exerted a first-order control on extinction rates through the Phanerozoic using a combined Earth system and ecophysiological modeling approach. We find that although continental configuration, the efficiency of the biological carbon pump in the ocean, and initial climate state all impact the magnitude of modeled biodiversity loss across simulated warming events, atmospheric oxygen is the dominant predictor of extinction vulnerability, with metabolic habitat viability and global ecophysiotype extinction exhibiting inflection points around 40% of present atmospheric oxygen. Given this is the broad upper limit for estimates of early Paleozoic oxygen levels, our results are consistent with the relative frequency of high-magnitude extinction events (particularly those not included in the canonical big five mass extinctions) early in the Phanerozoic being a direct consequence of limited early Paleozoic oxygenation and temperature-dependent hypoxia responses. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Earth system evolution; Ecophysiology; Extinction; Oxygen; Temperature-dependent hypoxia
语种	英语
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/238345
作者单位	Department of Geological Sciences, Stanford University, Stanford, CA 94305, United States; Department of Earth and Planetary Sciences, University of California, Riverside, CA 92521, United States; Biogéosciences, UMR 6282, CNRS, Université Bourgogne Franche-Comté, Dijon, F-21000, France; Department of Integrative Biology, University of California, Berkeley, CA 94720, United States
推荐引用方式 GB/T 7714	Stockey R.G.,Pohl A.,Ridgwell A.,et al. Decreasing Phanerozoic extinction intensity as a consequence of Earth surface oxygenation and metazoan ecophysiology[J],2021,118(41).
APA	Stockey R.G.,Pohl A.,Ridgwell A.,Finnegan S.,&Sperling E.A..(2021).Decreasing Phanerozoic extinction intensity as a consequence of Earth surface oxygenation and metazoan ecophysiology.Proceedings of the National Academy of Sciences of the United States of America,118(41).
MLA	Stockey R.G.,et al."Decreasing Phanerozoic extinction intensity as a consequence of Earth surface oxygenation and metazoan ecophysiology".Proceedings of the National Academy of Sciences of the United States of America 118.41(2021).