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In Search of Permian Perpetrators

机译:寻找二叠纪犯罪者

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摘要

Life on Earth has had a bumpy ride. The past half-billion years have witnessed a number of biotic crises of varying magnitude and impact. Probably best known is the end-Cretaceous cataclysm during which the dinosaurs, among other species, died out. However, the most severe event of this type occurred toward the very end of the Permian period, a little more than 250 million years ago, long before the first dinosaurs scampered about: Every ecosystem on Earth was devastated, from tropics to poles, from deep ocean to desert plain. Nine out of every 10 species disappeared forever. It took 100 million years for global biodiversity to return to preextinction levels. The cause of this catastrophe? We are still not completely certain.
机译:地球上的生命经历了颠簸。在过去的五亿年中,目睹了许多生物危机,其程度和影响各不相同。可能最著名的是白垩纪末世的大灾难,在此期间,恐龙以及其他物种灭绝了。但是,此类最严重的事件发生在大约二亿五千万年前的二叠纪时期的最后,远在第一批恐龙出现之前:地球上的每个生态系统都遭到破坏,从热带到极地,从深层海洋到沙漠平原。每10个物种中就有9个永远消失。全球生物多样性花了1亿年的时间才恢复灭绝前的水平。这场灾难的原因是什么?我们仍然不确定。

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