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End-Permian terrestrial ecosystem collapse in North China: evidence from palynology and geochemistry

Zhang, Peixin; Yang, Minfang; Lu, Jing; Bond, David P.G.; Shao, Longyi; Zhou, Kai; Xu, Xiaotao; Xua, Xiaotao; Wang, Ye; He, Zhen; Bian, Xiao; Hilton, Jason

Authors

Peixin Zhang

Minfang Yang

Jing Lu

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David Bond D.Bond@hull.ac.uk
Palaeoenvironmental Scientist and Schools Liason Officer

Longyi Shao

Kai Zhou

Xiaotao Xu

Xiaotao Xua

Ye Wang

Zhen He

Xiao Bian

Jason Hilton



Abstract

The Permian-Triassic Mass Extinction (ca. 252 Ma; PTME) is the most severe biocrisis of the Phanerozoic in both the oceans and on land. The crisis saw the collapse of terrestrial ecosystems in low, mid and high latitudes. Although terrestrial plant losses have been implicated as a driver of concurrent changes in terrestrial sedimentary environments and facies (e.g., fluvial style and/or grain size), the relationship between extinction and environmental change in the North China Plate (NCP) remains uncertain due to a paucity of plant macrofossils. We explore the relationship between terrestrial environments and changes in plant communities using a combination of sedimentology, palynology, geochemistry, mineralogy and charcoal data from a terrestrial succession in the Yiyang Coalfield located in the southern NCP. Our multiproxy approach places the end-Permian Terrestrial Collapse (EPTC) at the base of bed 20, below the level of the main (marine) PTME at the top of bed 21. The EPTC manifested as a rapid loss of vegetation accompanied by climatic warming and frequent wildfires. The main PTME was accompanied by warming, spikes in the Chemical Index of Alteration (corrected CIA, CIA*) and sedimentary Ni (Ni/Al) concentrations, and a transition from arid floodplain to fluvial facies in the sedimentary record. Our results reveal a rapid increase in charcoal content, rapid decline of spore-pollen content, disappearance of plant macro-fossils, rapid decline in TOC content, the onset of a negative δ13Corg excursion, and a shift in lithology from grayish-green sandstone and mudstone to purplish-red mudstone, suggesting that wildfires induced by global warming during the early eruption phase of the Siberian Traps Large Igneous Province triggered terrestrial ecosystem collapse in the NCP prior to the PTME. Plant extinctions during the EPTC were accompanied by changes in sedimentology and environment, but there was no abrupt change in fluvial styles. Temporal coincidence suggests that shifts in end-Permian terrestrial ecosystems toward those tolerant of warmer and more environmentally stressed environments were driven by concurrent Siberian Traps volcanism.

Citation

Zhang, P., Yang, M., Lu, J., Bond, D. P., Shao, L., Zhou, K., …Hilton, J. (2023). End-Permian terrestrial ecosystem collapse in North China: evidence from palynology and geochemistry. Global and planetary change, 222, Article 104070. https://doi.org/10.1016/j.gloplacha.2023.104070

Journal Article Type Article
Acceptance Date Feb 12, 2023
Online Publication Date Feb 15, 2023
Publication Date Mar 1, 2023
Deposit Date Feb 12, 2023
Publicly Available Date Feb 16, 2024
Journal Global and planetary change
Print ISSN 0921-8181
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 222
Article Number 104070
DOI https://doi.org/10.1016/j.gloplacha.2023.104070
Public URL https://hull-repository.worktribe.com/output/4200321

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