Exam 53: Population Ecology

Long-term studies of Belding's ground squirrels show that immigrants move nearly 2 kilometers from where they are born and become 1%-8% of the males and 0.7%-6% of the females in other populations. On an evolutionary scale, why is this significant?

To measure the population of lake trout in a 250-hectare lake, 400 individual trout were netted and marked with a fin clip, then returned to the lake. The next week, the lake was netted again, and out of the 200 lake trout that were caught, 50 had fin clips. Using the mark-recapture estimate, the lake trout population size could be closest to which of the following?

Use the graph to answer the following question. Which of the following examples are plausible explanations for a population that would produce curve A in the figure? I.Ongoing predation of rabbits throughout their lives II.Susceptibility of older humans to heart disease III.High seedling mortality in sunflowers

Natural selection involves energetic trade-offs between ________.

In July 2008, the United States had a population of approximately 302,000,000 people. How many Americans were there in July 2009, if the estimated 2008 growth rate was 0.88%?

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, how would you describe the population dynamics of the Eurasian lizard, Z. vivipara?

A population of white-footed mice becomes severely overpopulated in a habitat that has been disturbed by human activity. Sometimes intrinsic factors cause the population to increase in mortality and cause lower reproduction rates to occur in reaction to the stress of overpopulation. Which of the following is an example of intrinsic population control?

Use the figure to answer the following question. In the figure, imagine a different scenario where the death rate per capita was dependent upon (and positively correlated with) the density of the population, and the birth rate was instead density independent. As the density of the population increased, ________.

Use the survivorship curves in the figure to answer the following question. Which statement best explains survivorship curve B?

A recent study of ecological footprints concluded that ________.

Use the figures to answer the following question. Based on the diagrams in the figure and on the large population of baby boomers in the United States, which graph best reflects U.S. population in 20 years?

Use the figure to answer the following question. Looking at the data in the figure from the hare/lynx experiment, what conclusion(s) can you draw? I. Food is a factor in controlling hare population size. II. Excluding lynx is a factor in controlling hare population size. III.The effect of excluding predators and adding food in the same experiment is greater than the sum of excluding lynx alone plus adding food alone.

Based on current growth rates, Earth's human population in 2019 will be closest to

According to the logistic growth equation,

In 2008, the population of New Zealand was approximately 4,275,000 people. If the birth rate was 14 births for every 1,000 people, approximately how many births occurred in New Zealand in 2008?

Which of the following examples would most accurately measure the dispersion of a population being studied?

Use the graph to answer the following question. In the figure, which of the following survivorship curves implies that an animal may lay many eggs, of which a regular number die each year on a logarithmic scale?

Why does the U.S. population continue to grow even though the United States has essentially established a zero population growth (ZPG)?

Which of the following scenarios would provide the most accurate data on population density?

Use the survivorship curves in the figure to answer the following question. Which curve best describes survivorship in elephants?