气候变化领域集成服务门户(CCPortal): Calibrating the coevolution of Ediacaran life and environment

CCPortal

DOI	10.1073/pnas.2002918117
	Calibrating the coevolution of Ediacaran life and environment
	Rooney A.D.; Cantine M.D.; Bergmann K.D.; Gómez-Pérez I.; Baloushi B.A.; Boag T.H.; Busch J.F.; Sperling E.A.; Strauss J.V.
发表日期	2020
ISSN	0027-8424
起始页码	16824
结束页码	16830
卷号	117 期号:29
英文摘要	The rise of animals occurred during an interval of Earth history that witnessed dynamic marine redox conditions, potentially rapid plate motions, and uniquely large perturbations to global biogeochemical cycles. The largest of these perturbations, the Shuram carbon isotope excursion, has been invoked as a driving mechanism for Ediacaran environmental change, possibly linked with evolutionary innovation or extinction. However, there are a number of controversies surrounding the Shuram, including its timing, duration, and role in the concomitant biological and biogeochemical upheavals. Here we present radioisotopic dates bracketing the Shuram on two separate paleocontinents; our results are consistent with a global and synchronous event between 574.0 ± 4.7 and 567.3 ± 3.0 Ma. These dates support the interpretation that the Shuram is a primary and synchronous event postdating the Gaskiers glaciation. In addition, our Re-Os ages suggest that the appearance of Ediacaran macrofossils in northwestern Canada is identical, within uncertainty, to similar macrofossils from the Conception Group of Newfoundland, highlighting the coeval appearance of macroscopic metazoans across two paleocontinents. Our temporal framework for the terminal Proterozoic is a critical step for testing hypotheses related to extreme carbon isotope excursions and their role in the evolution of complex life. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Carbon isotopes; Ediacaran; Neoproterozoic; Re-Os geochronology; Shuram
语种	英语
scopus关键词	carbon; ancestry group; animal; Article; calibration; Canada; coevolution; conceptual framework; Ediacaran; environmental change; glaciation; macrofossil; nonhuman; paleoenvironment; priority journal; Proterozoic; radiolabeling; carbon cycle; environment; fossil; geographic and geological phenomena; Animals; Biological Coevolution; Carbon Cycle; Environment; Fossils; Geological Phenomena
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/160887
作者单位	Rooney, A.D., Department of Earth and Planetary Sciences, Yale University, New Haven, CT 06520, United States; Cantine, M.D., Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Bergmann, K.D., Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Gómez-Pérez, I., Petroleum Development Oman, Exploration Directorate, Muscat, 100, Oman; Baloushi, B.A., Petroleum Development Oman, Exploration Directorate, Muscat, 100, Oman; Boag, T.H., Department of Geological Sciences, Stanford University, Stanford, CA 94305, United States; Busch, J.F., Department of Earth Sciences, Dartmouth College, Hanover, NH 03755, United States; Sperling, E.A., Department of Geological Sciences, Stanford University, Stanford, CA 94305, United States; Strauss, J.V., Department of Earth Sciences, Dartmouth College, Hanover, NH 03755, United States
推荐引用方式 GB/T 7714	Rooney A.D.,Cantine M.D.,Bergmann K.D.,et al. Calibrating the coevolution of Ediacaran life and environment[J],2020,117(29).
APA	Rooney A.D..,Cantine M.D..,Bergmann K.D..,Gómez-Pérez I..,Baloushi B.A..,...&Strauss J.V..(2020).Calibrating the coevolution of Ediacaran life and environment.Proceedings of the National Academy of Sciences of the United States of America,117(29).
MLA	Rooney A.D.,et al."Calibrating the coevolution of Ediacaran life and environment".Proceedings of the National Academy of Sciences of the United States of America 117.29(2020).