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Exam 30: Ecology of Populations

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Question 1

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During a recent hurricane, 25 individuals of the same butterfly species were blown onto a barrier island in southern Florida. Prior to this event, this species did not inhabit the island, but with the ample vegetation on the island and a lack of predators, the displaced individuals were able to survive and reproduce. When the butterflies initially arrived on the island, they did not have to compete for food or space. What type of population growth did they likely exhibit?

A) logistic
B) exponential
C) density-dependent
D) density-independent
E) logarithmic

F) C) and D)
G) B) and C)

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Question 2

Multiple Choice

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All of the following are true about equilibrium populations except

A) larger individuals.
B) long time required to reach sexual maturity.
C) production of few offspring.
D) little or no parental care.
E) long life span.

F) C) and E)
G) B) and D)

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Question 3

Multiple Choice

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All of the following impact a population's ability to reach biotic potential except

Different populations living in the same geographical region is an)

Which of the following is an example of a density-dependent factor?

What is the greatest problem that the human population will face if we fail to have a greater understanding of ecology and environmental science?

What is meant by an organism's biotic potential?

Which of the following is an example of a density-independent factor?

During a recent hurricane, 25 individuals of the same butterfly species were blown onto a barrier island in southern Florida. In general, each female butterfly lays more than 50 eggs each year, but only a few individuals survive for more than a month after hatching from the eggs. What type of survivorship curve most accurately represents this species?

Emperor penguins defend an area around their nests. Their territory encompasses a complete circle around the nest with approximately a 0.5 m radius. If each nesting penguin has this same size and shape territory, what type of distribution will these animals exhibit?

If the fishing village of Hopkins, Belize, is experiencing a decreasing population, what should they do if they wish to reverse this trend and see the greatest amount of population growth in the next 10 years?

During a summer with lots of rain, the vegetation grew lush and the white-footed mouse populations increased due to increases in food availability. However, the next two summers were record drought years and food became increasingly scarce. Over these two years, the population size of the mice decreased due to increased competition for access to food. This increased competition is an example of

During a recent hurricane, 25 individuals of the same butterfly species were blown onto a barrier island in southern Florida. During the first year, 80 caterpillars hatched from eggs laid by the butterflies and only 5 individuals in the population died. What is the growth rate for the population during this period?

The birthrate in a small town is 14 per 1,000 per year and the death rate is 5 per 1,000 per year. What is the annual growth rate for this town?

A butterfly species has very wide distribution across southern Florida. In addition, the adults and caterpillars can use a wide array of plant species as a food source and also tolerate a broad range of temperatures. Based on these criteria, this species is unlikely to face extinction in the immediate future.

During a recent hurricane, 25 individuals of the same butterfly species were blown onto a barrier island in southern Florida. When the butterflies first arrived on the island, they remained in the southeast corner of the island where most of the flowering plants had not been destroyed or uprooted by the high winds and seas during the hurricane. What type of distribution do these butterflies exhibit?

Based upon the features listed, which of the following species is the most likely to go extinct?

A population growth curve that exhibits both exponential growth and a stable equilibrium phase is

Which of the following represents a type II survivorship curve?

Jacob is studying a population of wrens in Michigan. During one severe winter, 5% of the birds died due to starvation and cold temperatures. Severe weather is an example of