The timing and pattern of biotic recovery following the end-Permian mass extinction

@article{Chen2012TheTA,
  title={The timing and pattern of biotic recovery following the end-Permian mass extinction},
  author={Zhong‐Qiang Chen and Michael J. Benton},
  journal={Nature Geoscience},
  year={2012},
  volume={5},
  pages={375-383}
}
The aftermath of the great end-Permian period mass extinction 252 Myr ago shows how life can recover from the loss of >90% species globally. The crisis was triggered by a number of physical environmental shocks (global warming, acid rain, ocean acidification and ocean anoxia), and some of these were repeated over the next 5-6 Myr. Ammonoids and some other groups diversified rapidly, within 1-3 Myr, but extinctions continued through the Early Triassic period. Triassic ecosystems were rebuilt… 

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This results indicate the following sequence of diversification: a morphologically conservative and globally distributed post-extinction ‘disaster fauna’; a major but cryptic and poorly sampled phylogenetic diversification with significantly elevated evolutionary rates; and a marked increase in species counts, abundance, and disparity contemporaneous with global ecosystem stabilization some 5 million years after the extinction.
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