气候变化领域集成服务门户(CCPortal): The rise of angiosperms strengthened fire feedbacks and improved the regulation of atmospheric oxygen

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DOI	10.1038/s41467-020-20772-2
	The rise of angiosperms strengthened fire feedbacks and improved the regulation of atmospheric oxygen
	Belcher C.M.; Mills B.J.W.; Vitali R.; Baker S.J.; Lenton T.M.; Watson A.J.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	The source of oxygen to Earth’s atmosphere is organic carbon burial, whilst the main sink is oxidative weathering of fossil carbon. However, this sink is to insensitive to counteract oxygen rising above its current level of about 21%. Biogeochemical models suggest that wildfires provide an additional regulatory feedback mechanism. However, none have considered how the evolution of different plant groups through time have interacted with this feedback. The Cretaceous Period saw not only super-ambient levels of atmospheric oxygen but also the evolution of the angiosperms, that then rose to dominate Earth’s ecosystems. Here we show, using the COPSE biogeochemical model, that angiosperm-driven alteration of fire feedbacks likely lowered atmospheric oxygen levels from ~30% to 25% by the end of the Cretaceous. This likely set the stage for the emergence of closed-canopy angiosperm tropical rainforests that we suggest would not have been possible without angiosperm enhancement of fire feedbacks. © 2021, The Author(s).
语种	英语
scopus关键词	organic carbon; oxygen; phosphorus; sulfur; carbon; oxygen; angiosperm; carbon sink; Cretaceous; oxygen; paleoecology; paleoenvironment; rainforest; tropical forest; angiosperm; Article; Asparagaceae; atmosphere; bioavailability; biogeochemical cycling; biosphere; canopy; controlled study; Cretaceous; ecosystem; feedback system; fertilization; moisture; mycorrhiza; nonhuman; rain forest; Ranunculaceae; tropical rain forest; Upper Cretaceous; water vapor; weathering; algorithm; angiosperm; atmosphere; chemistry; fire; fossil; growth, development and aging; metabolism; physiological feedback; theoretical model; time factor; Magnoliophyta; Algorithms; Atmosphere; Carbon; Ecosystem; Feedback, Physiological; Fires; Fossils; Magnoliopsida; Models, Theoretical; Oxygen; Time Factors
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/251529
作者单位	wildFIRE Lab, University of Exeter, Exeter, EX4 4PS, United Kingdom; Global System Institute, University of Exeter, Exeter, EX4 4QE, United Kingdom; School of Earth and Environment, University of Leeds, Leeds, LS2 9TJ, United Kingdom
推荐引用方式 GB/T 7714	Belcher C.M.,Mills B.J.W.,Vitali R.,et al. The rise of angiosperms strengthened fire feedbacks and improved the regulation of atmospheric oxygen[J],2021,12(1).
APA	Belcher C.M.,Mills B.J.W.,Vitali R.,Baker S.J.,Lenton T.M.,&Watson A.J..(2021).The rise of angiosperms strengthened fire feedbacks and improved the regulation of atmospheric oxygen.Nature Communications,12(1).
MLA	Belcher C.M.,et al."The rise of angiosperms strengthened fire feedbacks and improved the regulation of atmospheric oxygen".Nature Communications 12.1(2021).