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Triassic–Jurassic extinction event
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==== Wildfires ==== The intense, rapid warming is believed to have resulted in increased storminess and lightning activity as a consequence of the more humid climate. The uptick in lightning activity is in turn implicated as a cause of an increase in wildfire activity.<ref>{{cite journal |last1=Petersen |first1=Henrik I. |last2=Lindström |first2=Sofie |date=15 October 2012 |title=Synchronous Wildfire Activity Rise and Mire Deforestation at the Triassic–Jurassic Boundary |journal=[[PLOS ONE]] |volume=7 |issue=10 |pages=e47236 |doi=10.1371/journal.pone.0047236 |pmid=23077574 |pmc=3471965 |bibcode=2012PLoSO...747236P |doi-access=free }}</ref> The combined presence of charcoal fragments and heightened levels of pyrolytic polycyclic aromatic hydrocarbons in Polish sedimentary facies straddling the Triassic-Jurassic boundary indicates wildfires were extremely commonplace during the earliest Jurassic, immediately after the Triassic-Jurassic transition.<ref>{{cite journal |last1=Marynowski |first1=Leszek |last2=Simoneit |first2=Bernd R. T. |title=Widespread Upper Triassic to Lower Jurassic Wildfire Records from Poland: Evidence from Charcoal and Pyrolytic Polycyclic Aromatic Hydrocarbons |date=1 December 2009 |url=https://bioone.org/journals/palaios/volume-24/issue-12/palo.2009.p09-044r/WIDESPREAD-UPPER-TRIASSIC-TO-LOWER-JURASSIC-WILDFIRE-RECORDS-FROM-POLAND/10.2110/palo.2009.p09-044r.short |journal=[[PALAIOS]] |volume=24 |issue=12 |pages=785–798 |doi=10.2110/palo.2009.p09-044r |bibcode=2009Palai..24..785M |s2cid=131470890 |access-date=29 March 2023}}</ref> Elevated wildfire activity is also known from the Junggar Basin.<ref>{{Cite journal |last1=Fang |first1=Yanan |last2=Fang |first2=Linhao |last3=Deng |first3=Shenghui |last4=Lu |first4=Yuanzheng |last5=Wang |first5=Bo |last6=Zhao |first6=Xiangdong |last7=Wang |first7=Yizhe |last8=Zhang |first8=Haichun |last9=Zhang |first9=Xinzhi |last10=Sha |first10=Jingeng |date=1 September 2021 |title=Carbon isotope stratigraphy across the Triassic-Jurassic boundary in the high-latitude terrestrial Junggar Basin, NW China |url=https://www.sciencedirect.com/science/article/pii/S0031018221003448 |journal=[[Palaeogeography, Palaeoclimatology, Palaeoecology]] |volume=577 |pages=110559 |doi=10.1016/j.palaeo.2021.110559 |bibcode=2021PPP...57710559F |issn=0031-0182 |access-date=12 January 2024 |via=Elsevier Science Direct}}</ref> In the Jiyuan Basin, two distinct pulses of drastically elevated wildfire activity are known: the first mainly affected canopies and occurred amidst relatively humid conditions while the second predominantly affected ground cover and was associated with aridity.<ref>{{Cite journal |last1=Zhang |first1=Peixin |last2=Yang |first2=Minfang |last3=Lu |first3=Jing |last4=Jiang |first4=Zhongfeng |last5=Zhou |first5=Kai |last6=Xu |first6=Xiaotao |last7=Wang |first7=Lei |last8=Wu |first8=Li |last9=Zhang |first9=Yuchan |last10=Chen |first10=Huijuan |last11=Zhu |first11=Xuran |last12=Guo |first12=Yanghang |last13=Ye |first13=Huajun |last14=Shao |first14=Longyi |last15=Hilton |first15=Jason |date=26 January 2024 |title=Different wildfire types promoted two-step terrestrial plant community change across the Triassic-Jurassic transition |journal=[[Frontiers in Ecology and Evolution]] |volume=12 |doi=10.3389/fevo.2024.1329533 |doi-access=free |issn=2296-701X }}</ref> At the Winterswijk quarry in the Netherlands, a surge in wildfire activity has been suggested to correspond to and have caused the sudden decline in coniferous vegetation.<ref>{{Cite journal |last=Bos |first=Remco |last2=van Zonneveld |first2=Roel-Jan |last3=Reumer |first3=Jelle W.F. |last4=Vis |first4=Geert-Jan |last5=Janssen |first5=Nico |last6=Everwijn |first6=Teun |last7=Sluijs |first7=Appy |last8=van de Schootbrugge |first8=Bas |date=22 November 2024 |title=A high-resolution palynological and geochemical study of the end-Triassic mass-extinction based on a new cored succession at Winterswijk (the Netherlands) |url=https://www.cambridge.org/core/journals/geological-magazine/article/highresolution-palynological-and-geochemical-study-of-the-endtriassic-massextinction-based-on-a-new-cored-succession-at-winterswijk-the-netherlands/FBE4D0B40A5F3B6DCB7EE2937B0DA9FE |journal=[[Geological Magazine]] |language=en |volume=161 |doi=10.1017/S0016756824000323 |issn=0016-7568 |access-date=18 February 2025 |via=Cambridge Core}}</ref> Frequent wildfires, combined with increased seismic activity from CAMP emplacement, led to apocalyptic [[soil degradation]].<ref>{{cite journal |last1=Van de Schootbrugge |first1=Bas |last2=Van der Weijst |first2=C. M. H. |last3=Hollaar |first3=T. P. |last4=Vecoli |first4=M. |last5=Strother |first5=P. K. |last6=Kuhlmann |first6=N. |last7=Thein |first7=J. |last8=Visscher |first8=Henk |last9=Van Konijnenburg-van Cittert |first9=H. |last10=Schobben |first10=M. A. N. |last11=Sluijs |first11=Appy |last12=Lindström |first12=Sofie |date=November 2020 |title=Catastrophic soil loss associated with end-Triassic deforestation |journal=[[Earth-Science Reviews]] |volume=210 |page=103332 |doi=10.1016/j.earscirev.2020.103332 |bibcode=2020ESRv..21003332V |s2cid=225203547 |doi-access=free }}</ref>
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