干旱区生态环境知识资源中心(Arid): Microconchids from Microbialites near the Permian-Triassic Boundary in the Zuodeng Section, Baise Area, Guangxi Zhuang Autonomous Region, South China and Their Paleoenvironmental Implications

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	Microconchids from Microbialites near the Permian-Triassic Boundary in the Zuodeng Section, Baise Area, Guangxi Zhuang Autonomous Region, South China and Their Paleoenvironmental Implications
	Yang Hao; Chen Zhongqiang; Ou Weiquan
来源期刊	Journal of Earth Science
ISSN	1674-487X
出版年	2015
卷号	26 期号:2 页码:157-165
英文摘要	Abundant microconchid worm tubes were extracted from the microbialites deposit near the Permian-Triassic boundary at the Zuodeng Section, Baise area, Guangxi Zhuang Autonomous Region, South China. These calcareous worm tubes were studied in both petrographic thin sections and isolated specimens using optical microscope and sensitive electronic microscope (SEM), respectively. They are categorized into two morphological types: helically coiled and planispirally coiled tubes, which are assignable to Microconchus aberrans (Hohenstein, 1913) and M. utahesis (Zaton et al., 2013), respectively. The tube wall ultrastructure is characterized by laminated micrites, which distinguish the studied microconchids from comparable microgastropods or spirorbid polychaete that usually has shell ultrastructure of spar texture. The overwhelm majority of microconchids from the microbialite possess the planispirally coiled tubes. The lifestyle of extant, morphologically convergent spirorbids suggests that these planispirally coiled microconchids may have colonized in some local oxygenic oases probably produced by photosynthetic cyanobacteria in the oxygen-poor microbialite ecosystem in which they may have settled densely with high competition among various individuals and with other associated animals for oxygen consumption and food soucres. The deleterious environment condition of the microbialite ecosystem immediately after the Permian-Triassic biocrisis is also indicated by various geochemical signals derived from the same section. Such a deleterious habitat may be inhospitable for most metazoans, but it has some local oxygenic oases that was favorable for opportunistic taxa to dwell.
英文关键词	Permian-Triassic microbialite microconchids paleoecology paleoenvironment
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Science & Technology - Other Topics
CSCD记录号	CSCD:5382955
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335459
作者单位	Yang Hao, China University of Geosciences (Wuhan), State Key Laboratory of Biogeology and Environmental Geology, Wuhan, Hubei 430074, China.; Chen Zhongqiang, China University of Geosciences (Wuhan), State Key Laboratory of Biogeology and Environmental Geology, Wuhan, Hubei 430074, China.; Ou Weiquan, China University of Geosciences (Wuhan), State Key Laboratory of Biogeology and Environmental Geology, Wuhan, Hubei 430074, China.
推荐引用方式 GB/T 7714	Yang Hao,Chen Zhongqiang,Ou Weiquan. Microconchids from Microbialites near the Permian-Triassic Boundary in the Zuodeng Section, Baise Area, Guangxi Zhuang Autonomous Region, South China and Their Paleoenvironmental Implications[J],2015,26(2):157-165.
APA	Yang Hao,Chen Zhongqiang,&Ou Weiquan.(2015).Microconchids from Microbialites near the Permian-Triassic Boundary in the Zuodeng Section, Baise Area, Guangxi Zhuang Autonomous Region, South China and Their Paleoenvironmental Implications.Journal of Earth Science,26(2),157-165.
MLA	Yang Hao,et al."Microconchids from Microbialites near the Permian-Triassic Boundary in the Zuodeng Section, Baise Area, Guangxi Zhuang Autonomous Region, South China and Their Paleoenvironmental Implications".Journal of Earth Science 26.2(2015):157-165.