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| The fluctuating environment associated with the episodic biotic crisis during the Permo/Triassic transition:Evidence from microbial biomarkers in Changxing,Zhejiang Province | |
| 作者姓名： | HUANG XianYu JIAO Dan LU LiQiang XIE ShuCheng HUANG JunHua WANG YongBiao YIN HongFu WANG HongMei ZHANG KeXin & LAI XuLong Key Laboratory of Biogeology and Environmental Geology Ministry of Education and the State Key Laboratory of GPMR China University of Geosciences Wuhan China Faculty of Material Science and Chemical Engineering China University of Geosciences Wuhan China School of Environmental Studies China University of Geosciences Wuhan China |
| 作者单位： | HUANG XianYu1，JIAO Dan1，LU LiQiang2，XIE ShuCheng1，HUANG JunHua1，WANG YongBiao1，YIN HongFu1，WANG HongMei3，ZHANG KeXin1 & LAI XuLong1 1 Key Laboratory of Biogeology and Environmental Geology，Ministry of Education，and the State Key Laboratory of GPMR，China University of Geosciences，Wuhan 430074，China; 2 Faculty of Material Science and Chemical Engineering，China University of Geosciences，Wuhan 430074，China; 3 School of Environmental Studies，China University of Geosciences，Wuhan 430074，China |
| 基金项目： | Supported by the National Natural Science Foundation of China (Grant Nos.40525008 and 40232025);;NCET Program of Ministry of Education of China (Grant No. NCET-04-0729);;Fok Ying Tung Education Foundation |
| 摘 要： | The environmental conditions and the biotic crisis during the Permo-Triassic (Tr/P) transition received increasing attention in the past decades. Presented herein are the molecular fossil records of cyano-bacteria and green sulfur bacteria,the base of the marine ecosystem,to highlight the episodic nature of both the environment and the biotic crisis during this critical period. At least two episodes of cyano-bacterial expansion are documented by 2-methylhopanes ranging from C28 to C32 in carbon number,indicative of the instable marine ecosystem and the fluctuant aquatic nutrients. Meanwhile,the index of 2-alkyl-1,3,4-trimethylbenzenes (biomarkers of green sulfur bacteria) and the ratio of pristane to phy-tane (Pr/Ph) witness the fluctuation of sedimentary environmental redox conditions. The above mo-lecular evidence suggests the occurrence of highly fluctuating environmental conditions during the Tr/P transition,which is consistent with,and probably the cause of,the multi-phased biotic crisis and the prolonged faunal recovery. |
| 收稿时间： | 17 May 2006 |
| 修稿时间： | 4 September 2006 |
The fluctuating environment associated with the episodic biotic crisis during the Permo/Triassic transition: Evidence from microbial biomarkers in Changxing,Zhejiang Province |
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| HUANG XianYu,JIAO Dan,LU LiQiang,XIE ShuCheng,HUANG JunHua,WANG YongBiao,YIN HongFu,WANG HongMei,ZHANG KeXin & LAI XuLong Key Laboratory of Biogeology and Environmental Geology,Ministry of Education,and the State Key Laboratory of GPMR,China University of Geosciences,Wuhan ,China, Faculty of Material Science and Chemical Engineering,China University of Geosciences,Wuhan ,China, School of Environmental Studies,China University of Geosciences,Wuhan ,China.The fluctuating environment associated with the episodic biotic crisis during the Permo/Triassic transition:Evidence from microbial biomarkers in Changxing,Zhejiang Province[J].Science in China(Earth Sciences),2007,50(7):1052-1059. | |
| Authors: | Huang XianYu Jiao Dan Lu LiQiang Xie ShuCheng Huang JunHua Wang YongBiao Yin HongFu Wang HongMei Zhang KeXin Lai XuLong |
| Institution: | 1. Key Laboratory of Biogeology and Environmental Geology, Ministry of Education, and the State Key Laboratory of GPMR, China University of Geosciences, Wuhan 430074, China 2. Faculty of Material Science and Chemical Engineering, China University of Geosciences, Wuhan 430074, China 3. School of Environmental Studies, China University of Geosciences, Wuhan 430074, China |
| Abstract: | The environmental conditions and the biotic crisis during the Permo-Triassic (Tr/P) transition received increasing attention in the past decades. Presented herein are the molecular fossil records of cyano-bacteria and green sulfur bacteria,the base of the marine ecosystem,to highlight the episodic nature of both the environment and the biotic crisis during this critical period. At least two episodes of cyano-bacterial expansion are documented by 2-methylhopanes ranging from C28 to C32 in carbon number,indic... |
| Keywords: | cyanobacteria green sulfur bacteria molecular fossil Tr/P transition environment |
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