In "The Great Dying" 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.

I presume the surviving species were reduced in number. Is there any information on by how much, or how much the total biomass was reduced?

  • $\begingroup$ I don't think there is such a study. The kings of biomass are bacteria and algae and the event hapenned long time ago. $\endgroup$ – Universal_learner Apr 16 at 11:31
  • $\begingroup$ @Universal_learner I was thinking in terms of the fossil record, but there could be "biosignatures" of microbial life. $\endgroup$ – Keith McClary Apr 16 at 17:05

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