The scientific consensus is that the causes of extinction were elevated temperatures and widespread oceanic anoxia due to the large amounts of carbon dioxide that were emitted by the eruption of the Siberian Traps. ... The speed of recovery from the extinction is disputed.
What happened in the Permian Triassic extinction?
About 250 million years ago, at the end of the Permian period, something killed some 90 percent of the planet's species. Less than 5 percent of the animal species in the seas survived. On land less than a third of the large animal species made it. Nearly all the trees died.
What caused the Permian Triassic extinction?
What caused the extinction? Warming of the Earth's climate and associated changes to oceans were the most likely causes of the extinctions. At the end of the Permian Period volcanic activity on a massive scale in what is now Siberia led to a huge outpouring of lava.
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