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Science Quickly

Death by Lightning Is Common for Tropical Trees

Science Quickly

Scientific American

Science

4.31.4K Ratings

🗓️ 2 September 2020

⏱️ 3 minutes

🧾️ Download transcript

Summary

A study estimates that 200 million trees in the tropics are mowed down by lightning annually.

Transcript

Click on a timestamp to play from that location

0:00.0

This is a passenger announcement. You can now book your train on Uber and get 10% back in credits to spend on Uber eats.

0:11.0

So you can order your own fries instead of eating everyone else's.

0:15.0

Trains, now on Uber. T's and C's apply. Check the Uber app.

0:20.0

This is scientific American's 60 second science.

0:27.0

I'm Scott Hirschberger.

0:29.0

The chance that a human being like you will be struck by lightning is minuscule.

0:36.0

But what if you're a tall tree in the tropics?

0:38.6

Lightning happens in milliseconds.

0:41.2

We can't predict where it's going to be and we generally can't find it after it's happened.

0:44.1

So what a hard thing to study.

0:46.3

Evan Gora, an ecologist at the University of Louisville.

0:49.7

Now, for the first time, Gora and his colleagues were able to quantify the effects of lightning

0:54.6

strikes in tropical forests around the world, thanks to satellite data and a network of

0:59.5

ground sensors.

1:00.9

We saw that it's forced to have more lightning strikes hitting per hectare per year,

1:05.7

have fewer large trees per hectare, presumably because they're killed by lightning.

1:09.4

More biomass turns are over a year, so basically the lightning seems to be affecting the

1:13.5

forests and causing trees to die, and then they have less total biomass.

1:18.0

In a ground survey in Panama, the researchers found that a single lightning strike

1:22.4

typically damages more than 20 trees,

1:24.8

and within a year five or six of them die.

1:27.6

The scientists combined this figure with their satellite data from around the world

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