Q: Using the net population growth rate ($$r = 0.23) $$and a population size ($$N = 1600$$), how many individuals are added to the bison population in one year?

$$ 1600 \times 0.23 = 368 $$ individuals

Question 1

Based on the graph showing bison counts in Yellowstone National Park, what type of population growth is most evident in the bison population since the year 2000?

Accepted Answer

Logistic growth

Question 2

After the reintroduction of wolves in Yellowstone (1995-96), what ecological effect would you expect on the bison population, based on the graph?

Accepted Answer

A stabilization of bison numbers as predation regulates population growth

Question 3

If the carrying capacity ($$K) $$for bison in Yellowstone is 4000 individuals, and the population is currently at 3500, which equation best describes the expected population growth rate according to the logistic growth model?

Accepted Answer

$$ \frac{dN}{dt} = rN \left( \frac{K-N}{K} \right) $$

Question 4

The graph shows periodic bison removals. What is the most likely reason for these removals in the context of population management?

Accepted Answer

To prevent overgrazing and maintain ecosystem balance

Question 5

If the annual per capita birth rate of bison is 0.60 and the annual per capita death rate is 0.37, what is the net population growth rate ($$r$$)?

Accepted Answer

$$ r = 0.23 $$

Question 6

Using the net population growth rate ($$r = 0.23) $$and a population size ($$N = 1600$$), how many individuals are added to the bison population in one year?

Accepted Answer

$$ 1600 	imes 0.23 = 368 $$ individuals

Question 7

Which factor is most likely to cause density-dependent regulation of the bison population in Yellowstone?

Accepted Answer

Availability of food resources

Question 8

If wolves were removed again from Yellowstone, what would be the most likely effect on the bison population?

Accepted Answer

Bison population would increase due to reduced predation

Question 9

Which of the following best describes the relationship between wolves and bison in Yellowstone National Park?

Accepted Answer

Predation

Question 10

If the bison population exceeds the carrying capacity ($$K$$), what is the most likely outcome?

Accepted Answer

Population will decline due to increased mortality and reduced birth rates

Population Growth and Ecological Dynamics in Yellowstone Bison

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