Wolves in Yellowstone The following exert describes the reintroduction program of the grey wolf back into Yellowstone. Exert: Question 1 1. Elk enjoy eating the leaves of Cottonwood trees. Which of the following represents a food chain with proper arrows showing energy flow that is found in the ecosystem described above.(1 point) Responses Elk » Cottonwood « Wolf Elk » Cottonwood « Wolf Cottonwood » Elk « Wolf Cottonwood » Elk « Wolf Wolf » Cottonwood » Elk Wolf » Cottonwood » Elk Cottonwood » Elk » Wolf Cottonwood » Elk » Wolf Question 2 2. Use the graph below to answer the question. How did the reintroduction of the grey wolf, a carnivore predator, affect the population of the cottonwood trees, a type of producer? (1 point) Responses The cottonwood tree population did not change. The cottonwood tree population did not change. The cottonwood tree population increased and then decreased back to zero. The cottonwood tree population increased and then decreased back to zero. The cottonwood tree population decreased and then stabilized. The cottonwood tree population decreased and then stabilized. The cottonwood tree population increased and then stabilized. The cottonwood tree population increased and then stabilized. Question 3 3. Use the drop down menus to complete the paragraph describing the events related to the reintroduction of the grey wolves into Yellowstone National Park.(6 points) Before people understood their importance in the ecosystem, the was hunted almost to extinction. Because of this, the population grew much too large. They overgrazed and caused significant reduction in the population of . When the grey wolf was reintroduced, they began to naturally the population of elk. This allowed the cottonwood tree population to . After several years of adjustment, all three populations and showed healthy oscillation in the ecosystem. Skip to navigation

Question

Wolves in Yellowstone The following exert describes the reintroduction program of the grey wolf back into Yellowstone. Exert: Question 1 1. Elk enjoy eating the leaves of Cottonwood trees. Which of the following represents a food chain with proper arrows showing energy flow that is found in the ecosystem described above.(1 point) Responses Elk » Cottonwood « Wolf Elk » Cottonwood « Wolf Cottonwood » Elk « Wolf Cottonwood » Elk « Wolf Wolf » Cottonwood » Elk Wolf » Cottonwood » Elk Cottonwood » Elk » Wolf Cottonwood » Elk » Wolf Question 2 2. Use the graph below to answer the question. How did the reintroduction of the grey wolf, a carnivore predator, affect the population of the cottonwood trees, a type of producer? (1 point) Responses The cottonwood tree population did not change. The cottonwood tree population did not change. The cottonwood tree population increased and then decreased back to zero. The cottonwood tree population increased and then decreased back to zero. The cottonwood tree population decreased and then stabilized. The cottonwood tree population decreased and then stabilized. The cottonwood tree population increased and then stabilized. The cottonwood tree population increased and then stabilized. Question 3 3. Use the drop down menus to complete the paragraph describing the events related to the reintroduction of the grey wolves into Yellowstone National Park.(6 points) Before people understood their importance in the ecosystem, the was hunted almost to extinction. Because of this, the population grew much too large. They overgrazed and caused significant reduction in the population of . When the grey wolf was reintroduced, they began to naturally the population of elk. This allowed the cottonwood tree population to . After several years of adjustment, all three populations and showed healthy oscillation in the ecosystem. Skip to navigation

Answer 1

Question 1:

Elk » Cottonwood « Wolf

Question 2:

The cottonwood tree population increased and then stabilized.

Question 3:

Before people understood their importance in the ecosystem, the grey wolf was hunted almost to extinction. Because of this, the population of grey wolves grew much too large. They overgrazed and caused significant reduction in the population of elk. When the grey wolf was reintroduced, they began to naturally control the population of elk. This allowed the cottonwood tree population to increase. After several years of adjustment, all three populations (grey wolves, elk, and cottonwood trees) showed healthy oscillation in the ecosystem.