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Science Quickly

Some Trees Beat Heat with Sweat

Science Quickly

Scientific American

Science

4.2639 Ratings

🗓️ 31 May 2018

⏱️ 4 minutes

🧾️ Download transcript

Summary

During extreme heat waves, a species of eucalyptus copes by releasing water and taking advantage of evaporative cooling. Other trees may do the same. Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:00.0

Understanding the human body is a team effort. That's where the Yachtel group comes in.

0:05.8

Researchers at Yachtolt have been delving into the secrets of probiotics for 90 years.

0:11.0

Yacold also partners with nature portfolio to advance gut microbiome science through the global grants for gut health, an investigator-led research program.

0:19.6

To learn more about Yachtolt, visit yawcult.co.j.p.

0:23.9

That's y-A-K-U-L-T.c-O-J-P.

0:28.4

When it comes to a guide for your gut, count on Yacolt.

0:33.7

Hi, I'm Scientific American Podcast editor Steve Merski.

0:37.4

And here's a short piece from the May 2018 issue of the magazine. Hi, I'm Scientific American podcast editor Steve Merski.

0:47.5

And here's a short piece from the May 2018 issue of the magazine in the section we call advances, dispatches from the frontiers of science, technology, and medicine.

0:51.6

Sweaty trees by Yasmin Saplicolu.

0:57.2

Recent summer temperatures in parts of Australia were high enough to melt asphalt.

1:02.1

As global warming cranks up the heat and climatic events intensify,

1:04.7

many plants may be unable to cope, but at least one species of eucalyptus tree can withstand extreme heat

1:09.4

by continuing to sweat when other essential

1:13.1

processes taper off. As plants convert sunlight into food or photosynthesize, they absorb

1:19.7

carbon dioxide through pores on their leaves. These pores also release water via transpiration,

1:25.8

which circulates nutrients through the plant and helps

1:28.9

cool it by evaporation. But exceptionally high temperatures are known to greatly reduce photosynthesis,

1:35.0

and most existing plant models suggest this should also decrease transpiration, leaving

1:41.4

trees in danger of fatally overheating.

1:49.5

Because it's difficult for scientists to control and vary trees' condition in their natural environment, little is known about how individual species handle this situation.

1:55.6

Ecologist John Drake of the SUNY College of Environmental Science and Forestry and his colleagues

...

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