Methanogenic burst in the end-Permian carbon cycle.

  title={Methanogenic burst in the end-Permian carbon cycle.},
  author={Daniel H Rothman and Gregory P Fournier and Katherine Louise French and Eric John Alm and Edward A Boyle and Changqun Cao and Roger E Summons},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  volume={111 15},
The end-Permian extinction is associated with a mysterious disruption to Earth's carbon cycle. Here we identify causal mechanisms via three observations. First, we show that geochemical signals indicate superexponential growth of the marine inorganic carbon reservoir, coincident with the extinction and consistent with the expansion of a new microbial metabolic pathway. Second, we show that the efficient acetoclastic pathway in Methanosarcina emerged at a time statistically indistinguishable… CONTINUE READING

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The Long Thaw (Princeton University Press, Princeton)

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