Lack of nutrients stalled rebound of marine life post-Permian extinction

Hot seas altered nitrogen cycle, delaying recovery by millions of years

Ellesmere Island

LONG DELAY  A lack of nutrients may have delayed the recovery of marine ecosystems following the Permian extinction. On northern Ellesmere Island in the Canadian Arctic, light-colored ocean sediments deposited after the extinction (bottom foreground) contain few nutrients; darker sediments that formed later (middle background along slope) are nutrient rich.

S. Grasby

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