Increased UV from ozone depletion sterilizes trees


02/14/2018 11:53 AM EST

dwarf pines in a growth chamber

University of California, Berkeley, paleobotanists put dwarf, bonsai pine trees in growth chambers and subjected them to up to 13 times the UV-B radiation Earth experiences today, simulating conditions that likely existed 252 million years ago during the planet’s worst mass extinction. The UV-B made the pines temporarily sterile and created malformed pollen, evidence that ozone depletion from volcanic eruptions could have led to high UV-B levels that contributed to the end-Permian

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University of California, Berkeley

This is an NSF News From the Field item.