Collapse of tropical rainforest ecosystems caused by high-temperature wildfires during the end-Permian mass extinction

doi:10.1016/j.epsl.2023.118193

	Collapse of tropical rainforest ecosystems caused by high-temperature wildfires during the end-Permian mass extinction
	Jiao, Shenglin 1,2,3; Zhang, Hua 1,2; Cai, Yaofeng 1,2; Chen, Jianbo 4,5; Feng, Zhuo 4,5; Shen, Shuzhong 6,7
刊名	EARTH AND PLANETARY SCIENCE LETTERS
	2023-07-15
卷号	614 页码:10
关键词	polycyclic aromatic hydrocarbons wildfires ecological ecosystem collapse Permian-Triassic transition Southwest China
ISSN号	0012-821X
DOI	10.1016/j.epsl.2023.118193
通讯作者	Zhang, Hua(hzhang@nigpas.ac.cn)
英文摘要	The end-Permian mass extinction (EPME) caused significant changes in the marine and terrestrial realms because of global environmental deterioration caused by intensive volcanic activities. Polycyclic aromatic hydrocarbons (PAHs) in sediments are powerful proxies indicating the frequency and intensity of wildfires during the Permian-Triassic (P-T) transition, providing critical information on floral turnovers and paleoclimatic conditions associated with P-T deforestation. In this study, we investigated high-resolution PAHs in a non-marine P-T transitional sequence from the HK-1 drill core at the Lengqinggou section of Southwest China. The consistency of the PAH distribution patterns as well as the positive correlation between the PAH contents in the whole sequence indicates that they are derived from the same source or process. Similarly, multiple PAH ratios (e.g., fluoranthene/(fluoranthene + pyrene)) changed dramatically with generally higher values in the Lopingian, indicating that the PAHs were more likely derived from a pyrogenic source (i.e., high-temperature wildfire events) compared to those in the Lower Triassic. The enrichment of PAHs at the HK-1 drill core in the terrestrial EPME interval indicates that the paleotropical rainforest ecosystem provided sufficient fuel for large-scale high-temperature wildfire combustion events. Furthermore, the extremely low PAH contents in the Lower Triassic indicated a fuel shortage after the mass deforestation, the highly diversified rainforest assemblage disappeared and was replaced with herbaceous, hinterland-like vegetation. The high coronene/phenanthrene ratio and coronene index indicated that although vegetation was scarce, high-temperature burning events were still common in the Lower Triassic, this evidence further supports the vegetation changeover during the P-T transition. These results indicate that intensified high-temperature wildfire combustion events in the paleotropical rainforest in Southwest China occurred because of global warming and aridity caused by intensive volcanic activities during the P-T transition.
资助项目	National Natural Science Foun-dation of China[42293280] ; Strategic Priority Research Programs of the Chinese Academy of Sciences[XDB26000000]
WOS关键词	POLYCYCLIC AROMATIC-HYDROCARBONS ; CRUDE OILS ; PALAEO-WILDFIRE ; OCEANIC ANOXIA ; BASIN ; SEDIMENTS ; COAL ; CHARCOAL ; INDICATORS ; EMISSIONS
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000998245700001
资助机构	National Natural Science Foun-dation of China ; Strategic Priority Research Programs of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.nigpas.ac.cn/handle/332004/42120]
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, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Ctr Excellence Life & Palaeoenvironm, Nanjing 210008, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Yunnan Univ, Inst Palaeontol, Yunnan Key Lab Earth Syst Sci, Yunnan Key Lab Palaeobiol, Kunming 650500, Peoples R China 5.Yunnan Univ, MEC Int Joint Lab Palaeobiol & Palaeoenvironment, Kunming 650500, Peoples R China 6.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210023, Peoples R China 7.Nanjing Univ, Frontiers Sci Ctr Crit Earth Mat Cycling, Nanjing 210023, Peoples R China
推荐引用方式 GB/T 7714	Jiao, Shenglin,Zhang, Hua,Cai, Yaofeng,et al. Collapse of tropical rainforest ecosystems caused by high-temperature wildfires during the end-Permian mass extinction[J]. EARTH AND PLANETARY SCIENCE LETTERS,2023,614:10.
APA	Jiao, Shenglin,Zhang, Hua,Cai, Yaofeng,Chen, Jianbo,Feng, Zhuo,&Shen, Shuzhong.(2023).Collapse of tropical rainforest ecosystems caused by high-temperature wildfires during the end-Permian mass extinction.EARTH AND PLANETARY SCIENCE LETTERS,614,10.
MLA	Jiao, Shenglin,et al."Collapse of tropical rainforest ecosystems caused by high-temperature wildfires during the end-Permian mass extinction".EARTH AND PLANETARY SCIENCE LETTERS 614(2023):10.