Keystone species

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Infographic: Wolves Keep Yellowstone in the Balance | Earthjustice -- Great for a lesson on food webs! Wolves Yellowstone, Yellowstone Wolves, Ap Environmental Science, Keystone Species, Secondary Science, Teaching Biology, Food Web, Environmental Education, School Help

In the 1920s, government policy allowed the extermination of Yellowstone’s gray wolf—the apex predator—triggering an ecosystem collapse known as trophic cascade. In 1995—through use of the Endangered Species Act—the conservation community reintroduced the gray wolf to restore balance. The impact was dramatic.

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Beavers: Building Nature’s Neighborhoods - The Greenway Foundation River Flow, Aquatic Insects, Cutthroat Trout, Keystone Species, Beaver Dam, Stunning Nature, River Bank, Bugs And Insects, American West

Beavers (like SPREE’s mascot, Chompers!) are cute, funky looking creatures that have inspired human curiosity for centuries, but did you know that they play an essential role in our river ecosystems? By blocking river flow, a beaver’s dam can create ponds or deeper channels of water. Many fish, like Colorado’s Greenback Cutthroat Trout, thrive in

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