Answer :
Final answer:
The reintroduction of wolves in the northern Rocky Mountains primarily affected the population of elk, which suffered a decline due to predation. This change allowed for the recovery of various plant species, demonstrating the wolves' crucial role as a keystone species in the ecosystem. Overall, the ecosystem benefitted from the wolves' presence, leading to increased biodiversity.
Explanation:
Impact of Wolf Reintroduction on Species in the Northern Rocky Mountains
The reintroduction of wolves to the northern Rocky Mountains, particularly in Yellowstone National Park, had profound effects on the ecosystem. When wolves were brought back in 1995, they primarily predated on elk, which were previously overpopulated due to the absence of natural predators. This predation led to a significant decrease in the elk population, which in turn allowed for the recovery of certain plant species like aspen and willow that had been heavily browsed.
While beavers also benefited from the restoration of aspen trees, the direct species suffering population loss due to the wolves' presence was mainly the elk. The wolves helped balance the ecosystem, reducing overgrazing and allowing for greater biodiversity.
Examples of Ecosystem Changes
- Beavers: Increased population due to more trees for food.
- Elk: Decreased population due to predation.
- Bald Eagles: Indirect benefits through increased availability of carrion.
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