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Question
Biology
Posted 5 months ago
Describe the trophic cascade that has been attributed to wolf reintroduction in Yellowstone
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Answer from Sia
Posted 5 months ago
Answer
The reintroduction of wolves in Yellowstone National Park has led to a significant trophic cascade, impacting various levels of the ecosystem.
Solution
a
Wolf Reintroduction: Wolves were reintroduced to Yellowstone in 1995 after being absent for about 70 years. This reintroduction aimed to restore the natural balance of the ecosystem
b
Elk Population Control: Wolves prey on elk, which had overpopulated the park in the absence of natural predators. The reduction in elk numbers led to less grazing pressure on vegetation
c
Vegetation Recovery: With fewer elk, vegetation such as willow and aspen began to recover. This recovery provided better habitats for other species, including beavers and birds
d
Beaver Population Increase: The increase in willow and aspen allowed beaver populations to grow. Beavers create dams and ponds, which provide habitats for fish, amphibians, and other aquatic species
e
Ripple Effects: The changes in vegetation and beaver activity also affected other species, including birds, insects, and even the physical geography of the park, such as river courses
Key Concept
Trophic Cascade
Explanation
A trophic cascade occurs when the addition or removal of top predators causes significant changes in the population sizes of species at different trophic levels, leading to a series of indirect effects throughout the ecosystem.

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