NIGPAS OpenIR
Late Triassic ecosystem variations inferred by palynological records from Hechuan, southern Sichuan Basin, China
Li, Liqin (李丽琴)1; Wang, Yongdong (王永栋)1; Vajda, Vivi2; Liu, Zhaosheng1
2018-11-01
Source PublicationGEOLOGICAL MAGAZINE
ISSN0016-7568
Volume155Issue:8Pages:1793-1810
Abstract

The Late Triassic deposits of the Sichuan Basin, southwestern China are significant for hosting abundant and diverse fossil assemblages including plants (containing spores and pollen), bivalves and insects. However, the Late Triassic palaeoecological variations are still poorly documented in this region. Here we present results from a palynological study from the Upper Triassic Xujiahe Formation in Hechuan of Chongqing, southern Sichuan Basin. The palynological analysis revealed a well-preserved terrestrial palynoflora of high diversity, comprising 184 species in 75 genera of spores and pollen. Three palynological assemblages were recognized, reflecting terrestrial successions throughout the entire interval with significant changes in the vegetation. Cycads/bennettites/ginkgophytes and conifers show an increasing trend into younger deposits, while ferns and lycopsids decrease in relative abundance. The Late Triassic vegetation underwent changes from lowland fern forest to a mixed forest with more canopy trees. We applied the Spore-pollen Morphological Group (SMG) method and Sporomorph EcoGroup (SEG) model to interpret the palaeoclimate features. The results reveal that the lower part of the Xujiahe Formation was deposited under relatively warm and humid conditions with an overall cooling and drying trend from latest Norian to Rhaetian time, accompanied by a general decrease of ferns and simultaneous increase of gymnosperms, and a decline in diversity of miospores. This study presents data on variations within the terrestrial ecosystem prior to the end-Triassic extinction event in the Sichuan Basin, and therefore provides important information for understanding the changes in the vegetation preceding the end-Triassic event.

KeywordEnd-triassic Event Palynology Mass Extinction Sporomorph Ecogroup Climate Change
DOI10.1017/S0016756817000735
Language英语
WOS KeywordAtlantic Magmatic Province ; In-situ Spores ; Large Igneous Provinces ; Jurassic Boundary ; Mass Extinction ; Triassic/jurassic Boundary ; East Greenland ; Ocean Acidification ; Fertile Organs ; Northwestern China
Funding ProjectChinese Academy of Sciences[XDB18000000] ; Chinese Academy of Sciences[XDPB0506] ; National Natural Sciences Foundation of China[NSFC 41572014] ; National Natural Sciences Foundation of China[41688103] ; State Key Program of Research and Development of Ministry of Science and Technology, China[2016YFC0600406] ; State Key Laboratory of Palaeobiology and Stratigraphy[20172103] ; Swedish Research Council[VR 2015-04264] ; Lund University Carbon Cycle Centre (LUCCI) ; Unesco/IUGS[632]
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000445338400010
Funding OrganizationChinese Academy of Sciences ; National Natural Sciences Foundation of China ; State Key Program of Research and Development of Ministry of Science and Technology, China ; State Key Laboratory of Palaeobiology and Stratigraphy ; Swedish Research Council ; Lund University Carbon Cycle Centre (LUCCI) ; Unesco/IUGS
PublisherCAMBRIDGE UNIV PRESS
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/16904
Collection中国科学院南京地质古生物研究所
Corresponding AuthorWang, Yongdong (王永栋)
Affiliation1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China
2.Swedish Museum Nat Hist, Frescativagen 40, S-11418 Stockholm, Sweden
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Li, Liqin ,Wang, Yongdong ,Vajda, Vivi,et al. Late Triassic ecosystem variations inferred by palynological records from Hechuan, southern Sichuan Basin, China[J]. GEOLOGICAL MAGAZINE,2018,155(8):1793-1810.
APA Li, Liqin ,Wang, Yongdong ,Vajda, Vivi,&Liu, Zhaosheng.(2018).Late Triassic ecosystem variations inferred by palynological records from Hechuan, southern Sichuan Basin, China.GEOLOGICAL MAGAZINE,155(8),1793-1810.
MLA Li, Liqin ,et al."Late Triassic ecosystem variations inferred by palynological records from Hechuan, southern Sichuan Basin, China".GEOLOGICAL MAGAZINE 155.8(2018):1793-1810.
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