NIGPAS OpenIR  > 中国科学院南京地质古生物研究所
Biogeochemical evidence for euxinic oceans and ecological disturbance presaging the end-Permian mass extinction event
Cao, Changqun (曹长群)2; Love, Gordon D.1; Hays, Lindsay E.1; Wang, Wei (王伟)2; Shen, Shuzhong (沈树忠)2; Summons, Roger E.1
2009-05-15
Source PublicationEARTH AND PLANETARY SCIENCE LETTERS
ISSN0012-821X
Volume281Issue:3-4Pages:188-201
Abstract

The Permian-Triassic Boundary event at 252.2 Ma marks the largest extinction of marine fauna in the Phanerozoic and there is a wide consensus that the extinction coincided with an intense oceanic anoxic event. The stratotype of the Changhsingian Stage, precisely constrained by the PTB Global Stratotype Section and Point (GSSP) and the GSSP for the Wuchiapingian-Changhsingian Boundary, both at Meishan in southern China, is well-documented in respect to geochronology and the pattern of extinction. Here we report secular trends in bulk isotopic parameters and lipid biomarkers in a core spanning 214 m of stratigraphic section across the PTB; and through the entire Changhsingian interval. Our analysis of these data, viewed in the context of relative sea level change and strontium isotopes, reveals distinct shifts in paleoenvironmental conditions and profound changes in plankton ecology well before and following the biological extinction event. Specifically, patterns of steroids and triterpenoids indicate a marine plankton community that was heavily dominated by bacteria during the late Wuchiapingian, middle Changhsingian and early Griesbachian stages. Secular trends in aromatic hydrocarbons diagnostic for anoxygenic green sulphur bacteria (Chlorobiaceae) identify periods when euxinic conditions extended into the photic zone during the entire Changhsingian stage. Here also, the delta N-15 of organic nitrogen progressively shifted from positive values around +2 or + 3%. to -1 parts per thousand coincident with a sharp negative excursion in delta C-13(org) and slightly postdating the sharp minimum in delta C-13 values of inorganic carbon that occurs at the top of Bed 24. These results, together the published chronology indicate that conditions unfavourable for aerobiosis existed in the marine photic zone at Meishan for 1.5 million years prior to the main phase of the biological extinction. The induction of marine euxinic conditions, worldwide, at the end of the Permian was likely a consequence of the aggregation of Pangea and the uplift, weathering and transport of nutrients to the ocean well in advance of the PTB. The protracted and widespread nature of the ensuing oceanic anoxic event suggests a causal association with the mass extinction. (c) 2009 Elsevier B.V. All rights reserved.

KeywordPermian Triassic Extinction Meishan South China Euxinia Chlorobiaceae Biomarker Hydrocarbons Stable Carbon Isotopes Strontium
DOI10.1016/j.epsl.2009.02.012
Language英语
WOS KeywordPhotic-zone Euxinia ; Carbon-isotope Excursions ; Triassic Boundary Section ; Marine Ecosystem Collapse ; Lower Rhine Basin ; Molecular Indicators ; Biological Markers ; Anoxic Event ; Crude Oils ; Paleoenvironmental Conditions
Funding ProjectResearch at Nanjing[973 (2006CB806400)] ; MST of China, NSFC ; CAS/SAFEA International Partnership Program for Creative Research Teams[NNG05GN62G]
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000266869000006
Funding OrganizationResearch at Nanjing ; MST of China, NSFC ; CAS/SAFEA International Partnership Program for Creative Research Teams
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/218
Collection中国科学院南京地质古生物研究所
其他
Corresponding AuthorSummons, Roger E.
Affiliation1.MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA
2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Cao, Changqun ,Love, Gordon D.,Hays, Lindsay E.,et al. Biogeochemical evidence for euxinic oceans and ecological disturbance presaging the end-Permian mass extinction event[J]. EARTH AND PLANETARY SCIENCE LETTERS,2009,281(3-4):188-201.
APA Cao, Changqun ,Love, Gordon D.,Hays, Lindsay E.,Wang, Wei ,Shen, Shuzhong ,&Summons, Roger E..(2009).Biogeochemical evidence for euxinic oceans and ecological disturbance presaging the end-Permian mass extinction event.EARTH AND PLANETARY SCIENCE LETTERS,281(3-4),188-201.
MLA Cao, Changqun ,et al."Biogeochemical evidence for euxinic oceans and ecological disturbance presaging the end-Permian mass extinction event".EARTH AND PLANETARY SCIENCE LETTERS 281.3-4(2009):188-201.
Files in This Item:
File Name/Size DocType Version Access License
26.pdf(1342KB)期刊论文出版稿开放获取CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Cao, Changqun (曹长群)]'s Articles
[Love, Gordon D.]'s Articles
[Hays, Lindsay E.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Cao, Changqun (曹长群)]'s Articles
[Love, Gordon D.]'s Articles
[Hays, Lindsay E.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Cao, Changqun (曹长群)]'s Articles
[Love, Gordon D.]'s Articles
[Hays, Lindsay E.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit Add to Technorati
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.