Intensive Wildfire Associated With Volcanism Promoted the Vegetation Changeover in Southwest China During the Permian-Triassic Transition

doi:10.3389/feart.2021.615841

	Intensive Wildfire Associated With Volcanism Promoted the Vegetation Changeover in Southwest China During the Permian-Triassic Transition
	Cai, Yao-feng 1,2,3; Zhang, Hua 1,2; Feng, Zhuo 4; Shen, Shu-zhong 5,6
刊名	FRONTIERS IN EARTH SCIENCE
	2021-03-04
卷号	9 页码:15
关键词	charcoal δ C-13(org) reflectance volcanism late Permian Southwest China
DOI	10.3389/feart.2021.615841
通讯作者	Zhang, Hua(hzhang@nigpas.ac.cn)
英文摘要	Palaeo-wildfire, which had an important impact on the end Permian terrestrial ecosystems, became more intense in the latest Permian globally, evidenced by extensive occurrence of fossil charcoals. In this study, we report abundant charcoals from the upper part of the Xuanwei Formation and the Permian-Triassic transitional Kayitou Formation in the Lengqinggou section, western Guizhou Province, Southwest China. These charcoals are well-preserved with anatomical structures and can be classified into seven distinctive types according to their characteristics. Organic carbon isotopic analyses of both bulk rocks and charcoals show that the delta C-13(org) values in the Kayitou Formation are notably more negative than those in the Xuanwei Formation, with a negative excursion of 4.08 parts per thousand immediately above the volcanic ash bed in the middle of the uppermost coal bed of the Xuanwei Formation. Charcoals with high reflectance values (Ro(mean) = 2.38%) are discovered below the ash bed. By contrast, the reflectance values (Ro(mean) = 1.51%) of the charcoals in the Kayitou Formation are much lower than those of the Xuanwei Formation, indicating the palaeo-wildfire types have changed from crown fires to surface fires, which was probably due to the retrogression of vegetation systems during the extinction. Based on the above evidence, we suppose that palaeo-wildfires became more frequent and more severe since the climate became drier during the latest Permian in Southwest China, and the eventual vegetation changeover of the terrestrial ecosystems in Southwest China could be caused by volcanism.
资助项目	Strategic Priority Research Programs (B) of the Chinese Academy of Sciences[XDB26000000] ; Strategic Priority Research Programs (B) of the Chinese Academy of Sciences[XDB18000000] ; National Natural Science Foundation of China[U1702242] ; National Natural Science Foundation of China[41502023] ; CAS[QYZDY-SSW-DQC023]
WOS研究方向	Geology
语种	英语
出版者	FRONTIERS MEDIA SA
WOS记录号	WOS:000629757600001
资助机构	Strategic Priority Research Programs (B) of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; CAS
内容类型	期刊论文
源URL	[http://ir.nigpas.ac.cn/handle/332004/37930]
专题	中国科学院南京地质古生物研究所
通讯作者	Zhang, Hua
作者单位	1.Chinese Acad Sci, State Key Lab Palaeobiol & Stratig, Nanjing Inst Geol & Palaeontol, Nanjing, Peoples R China 2.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 4.Yunnan Univ, Inst Palaeontol, Kunming, Yunnan, Peoples R China 5.Nanjing Univ, State Key Lab Mineral Deposits Res, Nanjing, Peoples R China 6.Nanjing Univ, Sch Earth Sci & Engn, Nanjing, Peoples R China
推荐引用方式 GB/T 7714	Cai, Yao-feng,Zhang, Hua,Feng, Zhuo,et al. Intensive Wildfire Associated With Volcanism Promoted the Vegetation Changeover in Southwest China During the Permian-Triassic Transition[J]. FRONTIERS IN EARTH SCIENCE,2021,9:15.
APA	Cai, Yao-feng,Zhang, Hua,Feng, Zhuo,&Shen, Shu-zhong.(2021).Intensive Wildfire Associated With Volcanism Promoted the Vegetation Changeover in Southwest China During the Permian-Triassic Transition.FRONTIERS IN EARTH SCIENCE,9,15.
MLA	Cai, Yao-feng,et al."Intensive Wildfire Associated With Volcanism Promoted the Vegetation Changeover in Southwest China During the Permian-Triassic Transition".FRONTIERS IN EARTH SCIENCE 9(2021):15.