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Ecology Unit Exam Prep

Total questions: 11

Worksheet time: 1hrs 21mins

Name
Class
Date
1.

This is a food web of Yellowstone National Park. Which organism(s) do Beavers get their energy from? Choose all the apply.

a)

Coyote

b)

Aspen, willow leaves and twigs

c)

Aspen bark

d)

Grizzly bear

e)

Berries

2.

These fungi are also found in the Yellowstone National Park ecosystem. What is their role in the food web?

4 lines
3.

Based on the food web what type of organism is the Raven? Explain your answer. (Word bank: Producer, herbivore, omnivore, carnivore, decomposer)

4 lines
4.

Identify three organisms that are apart on one food chain within the Yellowstone National Park food web. (Hint: start with a producer)

4 lines
5.

This is the food chain for the gray wolf. Explain how energy is passed in the food chain by writing what is happening at each arrow in the food chain.

4 lines
6.

list all the biotic and abiotic factors in the Yellowstone ecosystem.

4 lines
7.

Wolves are a native species to Yellowstone, but they almost went extinct in this area due to over-hunting. They were re-introduced into the ecosystem in 1995.

After the Grey wolf was re-introduced to the Yellowstone ecosystem, make a claim about what happened to the Elk population overall between 1995 and 2009

Claim: After the Grey wolf was re-introduced to Yellowstone, the Elk population ...

(a)  

8.

Wolves are a native species to Yellowstone, but they almost went extinct in this area due to over-hunting. They were re-introduced into the ecosystem in 1995.

After the Grey wolf was re-introduced to the Yellowstone ecosystem, make a claim about what happened to the Bison population overall between 1995 and 2009

Claim: After the Grey wolf was re-introduced to Yellowstone, the Bison population ...

(a)  

9.

Using the graphs, what evidence can you use to support your claim

(Claim: After the grey wolf was re-introduced into Yellowstone, the Elk population... and the Bison population...)

4 lines
10.

What is the likely reason that bison populations were low before the re-introduction of the grey wolf?

a)

The elk were hunting the bison

b)

the elk were scaring the bison away

c)

the elks overgrazed (overate) all the resources bison eat

d)

the bison were protesting the absence of their friend the grey wolf

11.

Using the information in the graph, list one reason why the Bison and elk populations have changed since the re-introduction of the grey wolf

(reasoning: after the reintroduction of the grey wolf, the elk population... and the bison population... because...)

4 lines