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Exam 53: Population Ecology

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Question 1

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Use the figure to answer the following question. Based on the figure and given the populations of the following countries, which country uses the most oil overall?

A) United States (population = 320 million)
B) Canada (population = 36 million)
C) China (population = 1.33 billion)
D) Russia (population = 144 million)

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Question 2

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Often the growth cycle of one population has an effect on the cycle of another. As moose populations increase, for example, wolf populations also increase. Thus, if we are considering the logistic equation for the wolf population, Which of the factors accounts for the effect of the moose population?

A) r
B) N
C) rN
D) K

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Question 3

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Use the figure to answer the following question. Life Table for Zootoca vivipara in the Netherlands Data are from Strijbosch and Creemers, 1988. Using the table, determine which age class year would cause the largest decline in the resulting population growth, if it were wiped out by disease.

Use the figure to answer the following question. Infant mortality and life expectancy at birth in developed and developing countries (data as of 2005) . What is a logical conclusion that can be drawn from the graphs? Developed countries have ________.

Imagine that you are managing a large game ranch. You know from historical accounts that a species of deer used to live there, but they have been extirpated. After doing some research to determine what might be an appropriately sized founding population, you reintroduce them. You then watch the population increase for several generations, and graph the number of individuals (vertical axis) against the number of generations (horizontal axis) . With no natural predators impacting the population, the graph will likely appear as ________.

Which statements about K are correct? I. K varies among populations. II. K varies in space. III.K varies in time. IV.K is constant for any given species.

Use the graph to answer the following question. In the figure, which of the following survivorship curves most applies to humans living in developed countries?

Which of the following traits is characteristic of K-selected populations?

Population ecologists follow the fate of same-age cohorts to

Which of the following graphs best illustrates the growth curve of a small population of rodents that has increased to a static carrying capacity?

A population's carrying capacity

Which of the following groups would be most likely to exhibit uniform dispersion?

Use the graph to answer the following question. In the figure, curves A-D depict per capita rate increases (r) . Which of the following best explains the difference between the shapes of these curves?

Use the graphs to answer the following question. Graph (b) in the figure shows the normal fluctuations of a population of grouse, a ground-nesting bird. Assuming graph (a) in the figure is the result of some experimental treatment in the grouse population, what can be concluded?

As N approaches K for a certain population, which of the following outcomes is predicted by the logistic equation?

Which of the following is the best natural example of a uniform pattern of dispersion?

Starting from a single individual, what is the size of a population of bacteria at the end of a 2-hour time period if they reproduce by binary fission every 20 minutes? (Assume unlimited resources and no mortality.)

In which of the following situations would you expect to find the largest number of r-selected individuals?

Analyzing ecological footprints reveals that

During exponential growth, a population always ________.