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zakruti.com » Knowledge, science, education » TED-Ed
Why do beavers build dams? - Glynnis Hood

Why do beavers build dams? - Glynnis Hood

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Rating: 4.5; Vote: 2
Explore how beavers build their impressive dams, and what impact these structures have on the surrounding environment. Nestled in the forests of Canada sits the world s longest beaver dam. This 850-meter-long structure is large enough to be seen in satellite imagery and has dramatically transformed the region, creating a pond containing 70 million liters of water. But dams of any size can have huge impacts on their environment. So how exactly do beavers build these impressive structures? Glynnis Hood investigates.
Date: 2023-01-05

Comments and reviews: 5


Also worth noting: Beaver dams trap sediment and nutrients at the bottom of the pond, so when dams are abandoned (say, due to an exhaustion of suitable food sources) and fall into disrepair, the drained pond becomes the site of rich meadows, which supports a host of additional species.
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UK guy here and we've seen the benefits of our beaver reintroduction program; during a recent heatwave and drought, the land beavers are based on remained lush and green while the farmland around wad dry and brown. I'm hoping the program continues and expands to more counties.
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I liked this a lot but I would have preferred to see some footage of actual beavers mixed with the animation which was a bit overblown at times - enough to actually detract.
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The quest for knowledge and understanding never gets dark and the more we ask why in videos like these, the more students know and the more remarkable the world truly seems.
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Great work as always. I'm reminded of the characters in the wonderful child book series Poppy when I think of beavers and all they do.
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