Question 1

Traditionally, most ecologists have assumed that community stability is a consequence of:

Accepted Answer

A)   competition.
B)   predation.
C)   community complexity.
D)   the relative size of realized niches among species.
E)   disease.

Question 2

The almost complete loss of the American chestnut tree to the chestnut blight fungus had ____ ecological impact on the moderately diverse Appalachian woodlands of which it was formerly a part.

Accepted Answer

A)   little
B)   great
C)   moderate
D)   undetectable
E)   detectable

Question 3

Explain the ecological significance of limiting resources, using three specific examples in your discussion.

Accepted Answer

A limiting resource is an environmental ...

Question 4

Humans have small mites that live in hair follicles and oil glands around the nose and eyelashes. What would you need to know to classify them as exhibiting mutualism, commensalism, or parasitism?

Accepted Answer

Concepts to Consider: In mutualism, bene...

Question 5

Competitive exclusion is a result of:

Accepted Answer

A)   interspecific competition.
B)   intraspecific competition.
C)   character displacement.
D)   succession.
E)   community complexity.

Question 6

The orderly replacement of one community by another is known as:

Accepted Answer

A)   character displacement.
B)   succession.
C)   coevolution.
D)   the edge effect.
E)   competitive exclusion.

Question 7

Pollution affects species diversity, thus the species richness of a highly polluted stream is ____ compared with that of a nearby pristine stream.

Accepted Answer

A)   low
B)   high
C)   no different
D)   more dense
E)   complex

Question 8

Keystone species:

Accepted Answer

A)   are always symbionts.
B)   are typically not the most abundant species in the community.
C)   illustrate secondary succession.
D)   always form the base of a food chain.
E)   are only found in tropical communities.

Question 9

One reason that the realized niche and fundamental niche are not typically the same is:

Accepted Answer

A)   limiting resources.
B)   reproductive potential.
C)   extinction event.s
D)   species diversity.
E)   species sparsity.

Question 10

Ecologist James H. Brown of the University of New Mexico has addressed species composition and richness in experiments conducted since 1977 in the Chihuahuan desert of southeastern Arizona. In one experiment, the removal of three dominant species, all kangaroo rats, from several plots resulted in an increased diversity of other rodent species. This increase was ascribed both to lowered competition for food and also to an altered habitat, because the abundance of grass species ____ after the removal of the kangaroo rats.

Accepted Answer

A)   increased
B)   decreased
C)   did not change
D)   was threatened
E)   shrunk

Question 11

In a lake, a certain native species of zooplankton is found evenly distributed in the water column. After introduction of a different species of zooplankton, the native species is only found in the shallow water zone. This is most likely an illustration of:

Accepted Answer

A)   character displacement.
B)   species richness.
C)   primary succession.
D)   secondary succession.
E)   competitive exclusion.

Question 12

The community found on a rotting log would include:

Accepted Answer

A)   sunlight.
B)   rainwater.
C)   bacteria.
D)   gases.
E)   minerals.

Question 13

Which organisms may be a keystone species in a tropical rain forest?

Accepted Answer

A)   gray wolves
B)   fruit-eating bats
C)   poison arrow frogs
D)   fig trees
E)   fruit-eating monkeys

Exam 54: Community Ecology

Competitive exclusion is a result of:

Correct Answer
verified

Explain the ecological significance of limiting resources, using three specific examples in your discussion.

Correct Answer
verified
A limiting resource is an environmental ...
View Answer

The orderly replacement of one community by another is known as:

Correct Answer
verified

Humans have small mites that live in hair follicles and oil glands around the nose and eyelashes. What would you need to know to classify them as exhibiting mutualism, commensalism, or parasitism?

Correct Answer
verified
Concepts to Consider: In mutualism, bene...
View Answer

In a lake, a certain native species of zooplankton is found evenly distributed in the water column. After introduction of a different species of zooplankton, the native species is only found in the shallow water zone. This is most likely an illustration of:

Correct Answer
verified

The community found on a rotting log would include:

Correct Answer
verified

Keystone species:

Correct Answer
verified

One reason that the realized niche and fundamental niche are not typically the same is:

Correct Answer
verified

Pollution affects species diversity, thus the species richness of a highly polluted stream is ____ compared with that of a nearby pristine stream.

Correct Answer
verified

Traditionally, most ecologists have assumed that community stability is a consequence of:

Correct Answer
verified

Correct Answer
verified

The almost complete loss of the American chestnut tree to the chestnut blight fungus had ____ ecological impact on the moderately diverse Appalachian woodlands of which it was formerly a part.

Correct Answer
verified

Which organisms may be a keystone species in a tropical rain forest?

Correct Answer
verified

Exam 54: Community Ecology

Competitive exclusion is a result of:

Correct AnswerverifiedShow Answer

Explain the ecological significance of limiting resources, using three specific examples in your discussion.

Correct AnswerverifiedA limiting resource is an environmental ...View AnswerShow Answer

The orderly replacement of one community by another is known as:

Correct AnswerverifiedShow Answer

Humans have small mites that live in hair follicles and oil glands around the nose and eyelashes. What would you need to know to classify them as exhibiting mutualism, commensalism, or parasitism?

Correct AnswerverifiedConcepts to Consider: In mutualism, bene...View AnswerShow Answer

In a lake, a certain native species of zooplankton is found evenly distributed in the water column. After introduction of a different species of zooplankton, the native species is only found in the shallow water zone. This is most likely an illustration of:

Correct AnswerverifiedShow Answer

The community found on a rotting log would include:

Correct AnswerverifiedShow Answer

Keystone species:

Correct AnswerverifiedShow Answer

One reason that the realized niche and fundamental niche are not typically the same is:

Correct AnswerverifiedShow Answer

Pollution affects species diversity, thus the species richness of a highly polluted stream is ____ compared with that of a nearby pristine stream.

Correct AnswerverifiedShow Answer

Traditionally, most ecologists have assumed that community stability is a consequence of:

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The almost complete loss of the American chestnut tree to the chestnut blight fungus had ____ ecological impact on the moderately diverse Appalachian woodlands of which it was formerly a part.

Correct AnswerverifiedShow Answer

Which organisms may be a keystone species in a tropical rain forest?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
A limiting resource is an environmental ...
View Answer

Correct Answer
verified

Correct Answer
verified
Concepts to Consider: In mutualism, bene...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified