Response of Hirnantia Fauna to the Environmental Changes before the Second Phase of Late Ordovician Mass Extinction: Example from the Kuanyinchiao Formation at Shuanghe, Southern <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:PlaceName w:st="on">Sichuan</st1:PlaceName> <st1:PlaceType w:st="on">Province</st1:PlaceType>, <st1:place w:st="on">Southwest China</st1:place> <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

Response of Hirnantia Fauna to the Environmental Changes before the Second Phase of Late Ordovician Mass Extinction: Example from the Kuanyinchiao Formation at Shuanghe, Southern Sichuan Province, Southwest China

详细信息

责任者：Li Guipeng (State Key Laboratory of Paleobiology and Stratigraphy ; Nanjing Institute of Geology and Palaeontology ; Chinese Academy of Sciences ; Nanjing 210008 ; China) ; Zhan Renbin
刊名：Geological Journal of China Universities
出版年：2009
卷期：15(3)
关键词：无脊椎动物 ; Invertebrata ; 动物群研究 ; faunal studies ; 四川 ; Sichuan Province
页码：p.304-317
图表：7 illus., 1 table, 72 refs.
分类号：1103
issnNo：ISSN1006-7493
isbnNo：CN32-1440/P

摘要

Based on the samples from the Guanyinqiao Formation at Shuanghe, Changning County, southern Sichuan Province, China, the authors analyze the palaeoecological changes of the Hirnantia fauna using taxonomic diversity and individual density, and the environmental changes in relation with the water depth, oxygen concentration and bioturbation levels throughout the Guanyinqiao Formation. The authors also discuss the relationships between the community changes and environmental fluctuations. It shows that community diversity and individual density of the Hirnantia fauna generally increased through time and decreased sharply near the top of the formation immediately after the taxonomic diversity reached its peak.

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