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Exam 9: Population Distribution and Abundance

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Question 21

Multiple Choice

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Which population dispersion pattern is most commonly observed while conducting field surveys?

A) Regular
B) Clumped
C) Genet
D) Random

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Question 22

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Which of the following is not a biotic feature of the environment that can limit an organism's distribution or abundance?

A) Parasites
B) Competitors
C) Predators
D) Rainfall

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Question 23

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Refer to the figure. -Based on the figure, what type of dispersion pattern best describes the location of individuals during the summer breeding season and what type best fits the location of individuals during winter?

A researcher who is interested in the number of individuals in a population of butterflies and their movement patterns would most likely use which method?

Which statement about Thomas and Jones's work on skipper butterflies is false?

An entomology research team interested in controlling the spread of winter moths, an insect pest in the northeastern United States, samples a 150-square-meter patch of woodland with four quadrats of 1 meter by 1 meter each. In quadrats A, B, C, and D, respectively, 10, 20, 35, and 15 individual winter moths are found. What is the best estimate for the total number of winter moths in that patch of woodland?

Refer to the figure. - Based on the figure, describe the geographic range of the humpback whale.

Area-based methods often make use of sampling areas of a defined size called

Suppose two populations are very isolated from one another, with several barriers to dispersal. Could these two populations be considered part of the same metapopulation? Why or why not?

What is the most likely reason that polar bears are found in the Arctic but not in Antarctica?

Which statement about Duggins's urchin removal experiments is true?

Lande's theoretical work contributed to the listing of the northern spotted owl as a threatened species in the United States. Which threat to the owl did Lande's work identify?

The giant panda is listed as vulnerable by IUCN. Suitable panda habitat is usually between 5,000 and 10,000 feet in elevation with a cool wet climate. How could a species distribution model be used to help save the giant panda from extinction?

Refer to the figure. Based on the figure, what is the most popular winter breeding ground for humpback whales?

A researcher is asked to determine the population size of redwood trees after a fire. They randomly take 5 aerial photos, each of which represents 1 km². The total area burned by the fire was 200 km². The researcher identifies 30, 2, 42, 22, and 104 redwood trees in the photos.Answer the following questions: (a) What is the population size of redwood trees in the burn area? (b) When looking at the data, there is one high and one low outlier. What could cause the numbers to be so different in these two photos? (c) How could you confirm that your estimated population size is accurate?

Which principle is illustrated by Lande's theoretical work with spotted owls?

In some worm species, the actions of individual worms make the soil more hospitable to other members of the species. Such a phenomenon would tend to encourage which dispersion pattern?

Estes and his colleagues speculate that the decline in otters during the 1990s was due to a(n)

King's Lomatia (Lomatia tasmanica) is a most unusual plant. In the wild, only a single genetic individual of this shrub is known to be alive, and this colony has existed for at least 40,000 years. When a branch of this shrub falls to the ground, it sometimes establishes roots, and thus can function as a physiologically independent plant that is genetically identical to all other plants in the colony. - Which term refers to a clone that is a physiologically independent plant?

Point sampling is a type of