Two episodes of microbial change coupled with Permo/Triassic faunal mass extinction

Shucheng Xie, Richard D. Pancost (), Hongfu Yin, Hongmei Wang and Richard P. Evershed
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Shucheng Xie: University of Bristol
Richard D. Pancost: University of Bristol
Hongfu Yin: China University of Geosciences
Hongmei Wang: China University of Geosciences
Richard P. Evershed: University of Bristol

Nature, 2005, vol. 434, issue 7032, 494-497

Abstract: Mass extinction by degrees The Permian/Triassic boundary, around 240 million years ago, saw one of the most severe extinction events known. New evidence suggests that the ecological crisis at the end of the Permian occurred in at least two distinct episodes. Past populations of photosynthetic cyanobacteria (‘green slime’) leave a molecular fossil, in the form of methylhopanes. These markers in P/Tr sediments in China record a rapid increase in numbers of cyano bacteria after each of two ecological crises.

Date: 2005
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DOI: 10.1038/nature03396

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