Science, 5 September 2024
In places where bat populations crashed, farmers sprayed more insecticides, and baby mortality spiked
‘My jaw dropped’: Bat loss linked to death of human infants
In 2006, bats throughout New England began dying en masse from a mysterious and incurable fungal disease called white nose syndrome. Over the next decade, their populations plummeted—and humans living nearby suffered, according to a new study.
With fewer predators around, insect numbers increased, leading to farmers spraying about 31% more pesticides, researchers report this week in Science. At the same time, infant mortality in counties increased by 8%. The authors link those deaths to the rise in the use of insecticides, which are known to be dangerous, especially for fetuses and infants.
That link is a “pretty dramatic claim that’s going to get a lot of attention,” says Paul Ferraro, a sustainability scientist at Johns Hopkins University who was not involved with the new work. The study, he says, is the “most convincing evidence to date” linking economic and health impacts with dramatic losses of a wild species.