Name: What Tardigrades Can Teach Us About Life in the Rainforest
Uploaded: 2021-04-16T17:45:26.000Z
Duration: 5 min 57 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

We had been looking at the bottoms of trees, as foresters, for over a century,

程度の副詞

and nobody ever knew  the top was so different from the bottom.

Located hundreds of feet above the ground in the canopies of forests is a unique ecosystem

that is home to a potential cure for some of the world's deadliest diseases,

microscopic tardigrades, and temporarily, this group of daredevil researchers.

With the advent of ropes and a few slingshots that I invented along the way, we went to

the mid-canopy and we went to the upper canopy, which were really new exploration opportunities.

Dr. Meg Lowman pioneered forest exploration when all there was to use

were cranes, hot air balloons, and walkways.

Now, that toolkit is expanding, which is essential to help combat threats

Suddenly we have drones, and we also have LiDAR, and some of the other aerial technologies

that are giving us incredible, broad brush strokes of things like canopy drought, distribution

of canopy vines, or certain species of trees that we're trying to track

that make it really tough to do, tree after tree,  from the ground.

One of the areas of Meg's expertise involves the close relationship

between insects and plants in the rainforest.

I have to learn a lot about both. I do focus on  the tree as a system,

and the tree as a support for so many other types  of life in the rainforest.

But I do focus a lot on insects, because they tend to be the dominant herbivore,

and there are millions of insects up there,  and they are beautiful and gorgeous.

The levels of light and rain hitting the top of these forests cause canopies to be hotspots

for biodiversity, accounting for likely fifty percent of all land-based life on Earth.

- Of that fifty percent life on Earth, probably only ten percent has been seen or discovered

by that handful of us that explore the canopy.

But it truly is a guessing game, because maybe we've missed a whole group.

And I think water bears is a good example.

That's a whole phylum that nobody really explored until about the last three or four years

when I partnered with a water bear taxonomist.

We can't even count those creatures when we're up there, because we can't see them

These water bears, or tardigrades, are tiny:  roughly half a millimeter.

These creatures are most likely carried to these towering trees by wind.

If these extremophiles do not find their environment to be satisfactory, they can enter a stage

known as cryptobiosis, curling up into a ball to survive extreme conditions for extended

periods of time without food or water, and coming back to life when conditions have improved.

New species of tardigrades continue to be discovered and analyzed,

given that their cellular construction could reveal clues to radiation protection,

and their genetics could lead to answers surrounding resiliency.

This is just one of the areas that Meg comes across in her work with trees and insects

that underscores how important this resource can be for humans.

In a few cases, pharmaceutical companies have made that magical link

And so it's given me a really wonderful ability to work with the local shaman and the villagers

in a lot of countries where the medicinal value of the trees is so important.

The leaves that aren't eaten by insects tend to be the ones that have sequestered

chemical compounds that can in turn be turned into medicines.

We now realize we can use the insect damage to figure out which trees

Meg's research has even more urgency, especially if the rate of deforestation

Using satellite analysis, NASA predicts that in just 40 years, about a billion hectares

of rainforest land, about the size of Europe, will have disappeared.

In 100 years, rainforests will be gone altogether.

We have so many easy ways of connecting ourselves to trees.

I mentioned medicines, fruits, home to biodiversity.

It's hard to sell people on the fact that they should keep millions of creatures alive

when they probably can't understand their importance value.

I think a good analogy is that in an airplane there are a lot of redundant screws,

and maybe you don't need every single one to fly the plane, but at some point,

if they keep dropping off of the machine,  it's not going to work anymore.

We know that each species has a role in this ecosystem, and we need to keep that system healthy.

So the more that we can protect those species, the better off we are.

For more episodes of Science in the Extremes, check out this one right here.

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