Question 1

When considering what the Competitive Exclusion Principle states,what should one remember?

Accepted Answer

A)  All species have their own niche. 
B)  Niche differentiation does not indicate that there are coexisting competitors. 
C)  The species may not be competing at all and may never have done so in their evolutionary past. 
D)  There must be some data to support the idea of interspecific competition. 
A)  All species have their own niche. 
B)  Niche differentiation does not indicate that there are coexisting competitors. 
C)  The species may not be competing at all and may never have done so in their evolutionary past. 
D)  There must be some data to support the idea of interspecific competition.

Question 2

You are on an island and observe that an introduced species of mongoose differs significantly in size from its mainland counterpart.The introduction to the island occurred within 100-200 generations.Based on your reading in Chapter 6,what is one reason why this mongoose may have increased in size?

Accepted Answer

A)  There are fewer resources on the island. 
B)  It is due to the Ghost of Competition Past. 
C)  The available prey on this island is larger then prey on the mainland. 
D)  A larger mongoose species that is native to its range is not present on the island. 
A)  There are fewer resources on the island. 
B)  It is due to the Ghost of Competition Past. 
C)  The available prey on this island is larger then prey on the mainland. 
D)  A larger mongoose species that is native to its range is not present on the island.

Question 3

You observe ten species of trees in a rainforest.You learn that species with similar light requirements tend to differ in terms of preferred soil textures and vice versa.You should recognize this pattern as

Accepted Answer

A)  Niche complementarity. 
B)  Intraspecific competition. 
C)  Interspecific competition. 
D)  Niche differentiation. 
A)  Niche complementarity. 
B)  Intraspecific competition. 
C)  Interspecific competition. 
D)  Niche differentiation.

Question 4

The Lotka-Volterra Model relies heavily on a variable known as the competitive coefficient (α12).Which of the following statements regarding the competitive coefficient is true?

Accepted Answer

A)  The value of the competitive coefficient is constant for a given species, regardless of competitor it is being compared to 
B)  If the value of α12 = 0.5 for any species 1 and species 2, then the competitive effect that species 2 has on species 1 is twice the effect species 1 has intraspecifically 
C)  If the value ofα12 = 0.5 for any species 1 and species 2, then the competitive effect that species 2 has on species 1 is half the effect species 1 has intraspecifically 
D)  If the value of α12 = 0.5 for any species 1 and species 2, then the competitive effect that species 1 has on species 2 is half the effect species 2 has intraspecifically 
A)  The value of the competitive coefficient is constant for a given species, regardless of competitor it is being compared to 
B)  If the value of α12 = 0.5 for any species 1 and species 2, then the competitive effect that species 2 has on species 1 is twice the effect species 1 has intraspecifically 
C)  If the value ofα12 = 0.5 for any species 1 and species 2, then the competitive effect that species 2 has on species 1 is half the effect species 1 has intraspecifically 
D)  If the value of α12 = 0.5 for any species 1 and species 2, then the competitive effect that species 1 has on species 2 is half the effect species 2 has intraspecifically

Question 5

The Competitive Exclusion Principle allows researchers to assume

Accepted Answer

A)  That coexistence occurs because species have competed and formed different niches. 
B)  There is no need for proof of interspecific competition. 
C)  The species are still competing and always will until niche differentiation occurs. 
D)  None of the above. 
A)  That coexistence occurs because species have competed and formed different niches. 
B)  There is no need for proof of interspecific competition. 
C)  The species are still competing and always will until niche differentiation occurs. 
D)  None of the above.

Question 6

Several species of anemone fish are associated with a particular species of anemone.Each species shows a characteristic preference for a particular zone.However,when anemone fish are associated with the same anemone,they are typically found in different zones.This is an example of

Accepted Answer

A)  Niche differentiation. 
B)  Intraspecific competition. 
C)  Coexistence. 
D)  Niche complementarity. 
A)  Niche differentiation. 
B)  Intraspecific competition. 
C)  Coexistence. 
D)  Niche complementarity.

Question 7

The textbook states that determining the effects of interspecific competition can be very difficult to do,especially when it seems as if two species competitively coexist.Which of the following types of experiments would most likely allow you to confirm and determine the effects of interspecific competition between two closely related species in nature?

Accepted Answer

A)  Removal study 
B)  Reciprocal transplant study 
C)  Laboratory observation study or a "glass bottle study" 
D)  Ecological survey study 
A)  Removal study 
B)  Reciprocal transplant study 
C)  Laboratory observation study or a "glass bottle study" 
D)  Ecological survey study

Question 8

What does the Competitive Exclusion Principle state?

Accepted Answer

A)  The Competitive Exclusion Principle states that if two competing species coexist in a stable environment, then they do so as a result of differentiation of their realized niches. 
B)  The Competitive Exclusion Principle states that all species within a community coexist in an unstable environment, and that they are structured by competition that leads to realized niches. 
C)  The Competitive Exclusion Principle states that if a guild of competing species coexist in an stable environment, they do so as a result of differentiation of their fundamental niche. 
D)  None of the above 
A)  The Competitive Exclusion Principle states that if two competing species coexist in a stable environment, then they do so as a result of differentiation of their realized niches. 
B)  The Competitive Exclusion Principle states that all species within a community coexist in an unstable environment, and that they are structured by competition that leads to realized niches. 
C)  The Competitive Exclusion Principle states that if a guild of competing species coexist in an stable environment, they do so as a result of differentiation of their fundamental niche. 
D)  None of the above

Question 9

Coexistence between a superior and inferior competitor can occur if

Accepted Answer

A)  The two species have independent, aggregated distributions. 
B)  The superior is homogenous throughout the habitat. 
C)  Competition were directed most from the superior to the inferior competitor. 
D)  All of the above. 
A)  The two species have independent, aggregated distributions. 
B)  The superior is homogenous throughout the habitat. 
C)  Competition were directed most from the superior to the inferior competitor. 
D)  All of the above.

Question 10

Which is an example of niche complementarity?

Accepted Answer

A)  Species of anemone fish associated with the same anemone tending to be found in different shore zones, while anemone fish living in the same zone tend to be associated with different anemone species. 
B)  Two species of phytoplankton that coexist when resources are balanced. 
C)  Three mongoose species that overlap and develop morphological variation in response to selection for smaller prey. 
D)  All of the above 
A)  Species of anemone fish associated with the same anemone tending to be found in different shore zones, while anemone fish living in the same zone tend to be associated with different anemone species. 
B)  Two species of phytoplankton that coexist when resources are balanced. 
C)  Three mongoose species that overlap and develop morphological variation in response to selection for smaller prey. 
D)  All of the above

When considering what the Competitive Exclusion Principle states,what should one remember?

You are on an island and observe that an introduced species of mongoose differs significantly in size from its mainland counterpart.The introduction to the island occurred within 100-200 generations.Based on your reading in Chapter 6,what is one reason why this mongoose may have increased in size?

You observe ten species of trees in a rainforest.You learn that species with similar light requirements tend to differ in terms of preferred soil textures and vice versa.You should recognize this pattern as

The Lotka-Volterra Model relies heavily on a variable known as the competitive coefficient (α₁₂).Which of the following statements regarding the competitive coefficient is true?

The Competitive Exclusion Principle allows researchers to assume

Several species of anemone fish are associated with a particular species of anemone.Each species shows a characteristic preference for a particular zone.However,when anemone fish are associated with the same anemone,they are typically found in different zones.This is an example of

What does the Competitive Exclusion Principle state?

Coexistence between a superior and inferior competitor can occur if

Which is an example of niche complementarity?

Ecology and How to Do It

Ecology’s Evolutionary Backdrop

Physical Conditions and the Availability of Resources

Climate and the World’s Biomes

Birth, Death and Movement

Predation, Grazing and Disease

Molecular and Evolutionary Ecology

From Populations to Communities

Patterns in Species Richness

The Flux of Energy and Matter Through Ecosystems

Global Biogeochemical Cycles and Their Alteration by Humans

Conservation Ecology

The Ecology of Human Population Growth, Disease, and Food Supply

Filters

Exam 6: Interspecific Competition

When considering what the Competitive Exclusion Principle states,what should one remember?

You are on an island and observe that an introduced species of mongoose differs significantly in size from its mainland counterpart.The introduction to the island occurred within 100-200 generations.Based on your reading in Chapter 6,what is one reason why this mongoose may have increased in size?

You observe ten species of trees in a rainforest.You learn that species with similar light requirements tend to differ in terms of preferred soil textures and vice versa.You should recognize this pattern as

The Lotka-Volterra Model relies heavily on a variable known as the competitive coefficient (α12).Which of the following statements regarding the competitive coefficient is true?

The Competitive Exclusion Principle allows researchers to assume

Several species of anemone fish are associated with a particular species of anemone.Each species shows a characteristic preference for a particular zone.However,when anemone fish are associated with the same anemone,they are typically found in different zones.This is an example of

What does the Competitive Exclusion Principle state?

Coexistence between a superior and inferior competitor can occur if

Which is an example of niche complementarity?

Ecology and How to Do It

Ecology’s Evolutionary Backdrop

Physical Conditions and the Availability of Resources

Climate and the World’s Biomes

Birth, Death and Movement

Predation, Grazing and Disease

Molecular and Evolutionary Ecology

From Populations to Communities

Patterns in Species Richness

The Flux of Energy and Matter Through Ecosystems

Global Biogeochemical Cycles and Their Alteration by Humans

Conservation Ecology

The Ecology of Human Population Growth, Disease, and Food Supply

Filters

The Lotka-Volterra Model relies heavily on a variable known as the competitive coefficient (α₁₂).Which of the following statements regarding the competitive coefficient is true?