Question 1

__________ begins in an area where there was a preexisting community and well-formed soil.

Accepted Answer

A)   Character displacement
B)   Species richness
C)   Primary succession
D)   Secondary succession
E)   Competitive exclusion

Question 2

The impact of a keystone species is proportionate to their abundance in an ecosystem.
____________________

Accepted Answer

A) True 
 B)False  False

Question 3

In the studies by David Tilman of the University of Minnesota and John Downing of the University of Iowa, reported in the journal Nature in 1994, they established and monitored 207 plots of Minnesota grasslands for seven years.During the study period, Minnesota's worst drought in 50 years occurred (1987-1988) .The ecologists found that those plots with the greatest number of plant species lost __________ ground cover, as measured by dry weight, and recovered faster than species-poor plots.

Accepted Answer

A)   less
B)   more
C)   no detectable
D)   only deciduous
E)   detectable

Question 4

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 5

A(n)  __________ has both biotic and abiotic components.

Accepted Answer

A)   population
B)   community
C)   ecosystem
D)   species
E)   genus

Question 6

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. B

Question 7

The current concept of a climax community states that forest communities:

Accepted Answer

A)   never reach a state of permanent equilibrium.
B)   never are disturbed.
C)   are determined solely by climate.
D)   are not permanently affected by fires or floods.
E)   are the inevitable end-point of succession.

Question 8

The idea that older, more stable habitats have greater species richness than habitats subjected to frequent, widespread disturbances is known as:

Accepted Answer

A)   natural selection.
B)   the time hypothesis.
C)   island biogeography.
D)   the theory of community stability.
E)   the disturbance hypothesis.

Question 9

Species richness is a measure of both the number of species and the relative importance of each species based on its abundance, productivity, or size.
____________________

Accepted Answer

A) True 
 B)False

Question 10

Which are the three main roles played by organisms in community life?

Accepted Answer

A)   producer, detritivore, decomposer
B)   consumer, detritivore.decomposer
C)   producer, consumer, decomposer
D)   facilitator, decomposer, consumer
E)   realized niche, fundamental niche, habitat

Question 11

Habitat is best described as:

Accepted Answer

A)   the local environment in which a species lives.
B)   what a species eats.
C)   what competes with a species.
D)   the abiotic components of a species' environment.
E)   the totality of adaptations by a species to its environment.

Question 12

Species diversity is often very high in the region between two distinct communities, known as:

Accepted Answer

A)   an ecotone.
B)   a secondary successional area.
C)   a primary successional area.
D)   a fundamental niche.
E)   a realized niche.

Question 13

The relationship between reef-building coral animals and zooxanthellae is classified as:

Accepted Answer

A)   mutualism.
B)   commensalism.
C)   Batesian mimicry.
D)   parasitism.
E)   character displacement.

Question 14

Which habitat would most likely have the greatest species richness?

Accepted Answer

A)   prairie
B)   savanna
C)   tundra
D)   temperate desert
E)   tropical rain forest

Question 15

Which country would be expected to have the greatest species richness per unit area?

Accepted Answer

A)   Japan
B)   United States
C)   Brazil
D)   Canada
E)   New Zealand

Question 16

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 17

Describe the ongoing research concerning the relationship between species richness and community stability.What research supports or fails to support this relationship?

Accepted Answer

Concepts to Consider: The traditional vi...

Question 18

Within a community; a dominant species may appropriate a disproportionate share of available resources, thus __________ other species.

Accepted Answer

A)   increasing competition with
B)   increasing disease transmission with
C)   undergrazing
D)   outcompeting
E)   decreasing disease transmission

Question 19

MATCHING
a.restricts ecological niche species
d.finding common patterns and processes within the community
b.local environment in which a species lives
e.biological community and its abiotic environment
c.species' ecological role within the structure and function of a community
-ecosystem

Accepted Answer

The answer of MATCHING
a.restricts ecological niche species
d.finding common patterns and...

Question 20

MATCHING
a.restricts ecological niche species
d.finding common patterns and processes within the community
b.local environment in which a species lives
e.biological community and its abiotic environment
c.species' ecological role within the structure and function of a community
-limiting resource

Accepted Answer

A

Exam 54: Community Ecology

__________ begins in an area where there was a preexisting community and well-formed soil.

Correct Answer
verified

The impact of a keystone species is proportionate to their abundance in an ecosystem. ____________________

Correct Answer
verified
False

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

A(n) __________ has both biotic and abiotic components.

Correct Answer
verified

Keystone species:

Correct Answer
verified
B

The current concept of a climax community states that forest communities:

Correct Answer
verified

The idea that older, more stable habitats have greater species richness than habitats subjected to frequent, widespread disturbances is known as:

Correct Answer
verified

Species richness is a measure of both the number of species and the relative importance of each species based on its abundance, productivity, or size. ____________________

Correct Answer
verified

Which are the three main roles played by organisms in community life?

Correct Answer
verified

Habitat is best described as:

Correct Answer
verified

Species diversity is often very high in the region between two distinct communities, known as:

Correct Answer
verified

The relationship between reef-building coral animals and zooxanthellae is classified as:

Correct Answer
verified

Which habitat would most likely have the greatest species richness?

Correct Answer
verified

Which country would be expected to have the greatest species richness per unit area?

Correct Answer
verified

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

Correct Answer
verified

Describe the ongoing research concerning the relationship between species richness and community stability.What research supports or fails to support this relationship?

Correct Answer
verified
Concepts to Consider: The traditional vi...
View Answer

Within a community; a dominant species may appropriate a disproportionate share of available resources, thus __________ other species.

Correct Answer
verified

MATCHING a.restricts ecological niche species d.finding common patterns and processes within the community b.local environment in which a species lives e.biological community and its abiotic environment c.species' ecological role within the structure and function of a community -ecosystem

Correct Answer
verified

MATCHING a.restricts ecological niche species d.finding common patterns and processes within the community b.local environment in which a species lives e.biological community and its abiotic environment c.species' ecological role within the structure and function of a community -limiting resource

Correct Answer
verified
A

Exam 54: Community Ecology

__________ begins in an area where there was a preexisting community and well-formed soil.

Correct AnswerverifiedShow Answer

The impact of a keystone species is proportionate to their abundance in an ecosystem. ____________________

Correct AnswerverifiedFalse

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

A(n) __________ has both biotic and abiotic components.

Correct AnswerverifiedShow Answer

Keystone species:

Correct AnswerverifiedB

The current concept of a climax community states that forest communities:

Correct AnswerverifiedShow Answer

The idea that older, more stable habitats have greater species richness than habitats subjected to frequent, widespread disturbances is known as:

Correct AnswerverifiedShow Answer

Species richness is a measure of both the number of species and the relative importance of each species based on its abundance, productivity, or size. ____________________

Correct AnswerverifiedShow Answer

Which are the three main roles played by organisms in community life?

Correct AnswerverifiedShow Answer

Habitat is best described as:

Correct AnswerverifiedShow Answer

Species diversity is often very high in the region between two distinct communities, known as:

Correct AnswerverifiedShow Answer

The relationship between reef-building coral animals and zooxanthellae is classified as:

Correct AnswerverifiedShow Answer

Which habitat would most likely have the greatest species richness?

Correct AnswerverifiedShow Answer

Which country would be expected to have the greatest species richness per unit area?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Describe the ongoing research concerning the relationship between species richness and community stability.What research supports or fails to support this relationship?

Correct AnswerverifiedConcepts to Consider: The traditional vi...View AnswerShow Answer

Within a community; a dominant species may appropriate a disproportionate share of available resources, thus __________ other species.

Correct AnswerverifiedShow Answer

MATCHING a.restricts ecological niche species d.finding common patterns and processes within the community b.local environment in which a species lives e.biological community and its abiotic environment c.species' ecological role within the structure and function of a community -ecosystem

Correct AnswerverifiedShow Answer

MATCHING a.restricts ecological niche species d.finding common patterns and processes within the community b.local environment in which a species lives e.biological community and its abiotic environment c.species' ecological role within the structure and function of a community -limiting resource

Correct AnswerverifiedA

Correct Answer
verified

Correct Answer
verified
False

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
B

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

Correct Answer
verified

Correct Answer
verified
Concepts to Consider: The traditional vi...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A