How Wolves Change Rivers

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When wolves were reintroduced to Yellowstone National Park in the United States after being absent nearly 70 years, the most remarkable "trophic cascade" occurred. What is a trophic cascade and how exactly do wolves change rivers? George Monbiot explains.

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TRANSCRIPT:
One of the most exciting scientific findings of the past half century has been the discovery of widespread trophic cascades. A trophic cascade is an ecological process which starts at the top of the food chain and tumbles all the way down to the bottom. And the classic example is what happened in the Yellowstone National Park in the United States when wolves were reintroduced in 1995. Now, we – we all know that wolves kill various species of animals, but perhaps we’re slightly less aware that they give life to many others.

#TrophicCascades #Wolves #GeorgeMonbiot

[vegajahaziel]

We should add wolves to our government. To see how it changes.

[polderdebanjan]

this is just one example of how everything is inter-dependant.

[mclee]

I remember a time when this comment section wasn't filled with people complaining about watching the video for online school, it was filled with people in awe with the world and nature :(

[Chillypapaya]

You know what? I’m glad my science teacher showed me this video. I learned a lot about the ecosystem.

[stellarmorning]

People are saying they are here for online learning.... meanwhile this is probably my 20th rewatch in the past 4 years because I am obsessed with

[drewdaley]

sometimes when i'm feeling particularly emotional about the workings of the world, i come back and watch this video. the peaceful music and the wonder in the narrator's voice does something to my soul i think

[emilyedieelizabeth]

Online learning: happens
Science teachers making 42, 000, 000 people watch this video: *oh yeah, it’s all coming together*

[ahadraza]

Deer: avoid grazing in valleys and gorges
Everything else: 𝙞𝙩'𝙨 𝙛𝙧𝙚𝙚 𝙧𝙚𝙖𝙡 𝙚𝙨𝙩𝙖𝙩𝙚

[redwister]

3 years later this still blows me away

[iantoes]

Wolves: We’re going to change this entire landscape.

The deer population has left the chat.

[The.dog.warrior]

Now I want to buy a wolf so he can organize my life.

[johnnyism]

Who else is watching it just for pure joy and love of the nature, Just me? okay

[gabrielajo]

It is SO fascinating to see how nature and ecosystems self-regulate. The whole planet is like a breathing organism. Damn.

[katie_lundberg]

My husband and I were driving through the park yesterday and we saw three wolves. We drive through the park whenever the weather is good enough and we’re only 90 miles away from one of the entrances. It makes for a day trip. It was are fourth time through the park this year and it was our first time seeing any wolves.

[MrNeymar]

This video makes you realize how we living organisms are really all connected

[emilillez]

And elsewhere people want to kill off wolves as soon as their population is slightly above the line of being threatened. I wish I could show this to all the people in my country, because nature is absolutely awesome and too few have any idea about its complexity.

[mefford]

*The Yellowstone wolf project has been such an incredible and fascinating living science experiment! These wolves have literally changed the landscape and more moose, beaver, and songbirds were the first to reappear. Utterly fascinating!*

[lilith]

I cried watcing it, maybe i'm too sensitive, i don't know...But such a beauty, the perfect harmony that nature reach about herself. She's so fine without us...

[nr]

Our native people been screaming this for decades. Will we ever listen

[zsofiniedermayer]

I'm reading the comments about how many teachers made their class to watch this during lock downs and I am so happy about it. Actually 2 years ago I made my class to watch this after a presentation I made with a friend at 11th grade. I have chills every time I watch this video.