How Life (Barely) Survived The Greatest Extinction?

The community was short-lived, and was extinguished by a relatively minor ecologic disturbance as determined from the geochemistry of the host rocks, only to be replaced by a low-diversity community of ‘disaster taxa’, opportunistic organisms that thrive while others go extinct.

As conditions improved throughout the Early Triassic, these communities no longer had to cling to life in ephemeral refugia, but could expand into normal habitats around the world. The echinoids at this site are the ancestors of a diverse group of modern echinoids or sea urchins that live in reef communities, rocky shorelines and sandy shelves today.

The study will help bring about a deeper understanding of how modern oceans might respond to intense global warming due to natural or anthropogenic effects. It could inform the management of our oceanic resources as they continue to be affected by environmental stressors. The rock record is cryptic, but it records events that have run their full course. If we can decipher the story, then it is possible to inform us better as to what might happen in the future as changes to our environment continue to occur.

This study was supported by the National Science Foundation of China, the Strategic Priority Research Program (B) of the Chinese Academy of Sciences, and a Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery Grant.