Question 1

Self-thinning in a stand of trees

Accepted Answer

A) increases biomass per individual. 
B) decreases stand density. 
C) results in death of less competitive individuals. 
D) is a result of intraspecific competition. 
E) All of the choices are correct. 
A) increases biomass per individual. 
B) decreases stand density. 
C) results in death of less competitive individuals. 
D) is a result of intraspecific competition. 
E) All of the choices are correct.

Question 2

In the Lotka-Volterra competition equations,the parameter $\alpha$12 relates to the

Accepted Answer

A) population growth rate. 
B) carrying capacity in the absence of competition. 
C) carrying capacity in the presence of competition. 
D) effect OF species 2 ON population growth rate OF species 1. 
E) effect OF species 1 ON population growth rate OF species 2. 
A) population growth rate. 
B) carrying capacity in the absence of competition. 
C) carrying capacity in the presence of competition. 
D) effect OF species 2 ON population growth rate OF species 1. 
E) effect OF species 1 ON population growth rate OF species 2.

Question 3

In the Lotka-Volterra competition model,the intersection of two isoclines of zero population growth always indicates stable coexistence of two competitors.

Accepted Answer

A) True 
 B)False

Question 4

Gause's "competitive exclusion principle" states that

Accepted Answer

A) when two species occur together,competition is always prevented by some behavioral adjustment. 
B) no two species can coexist indefinitely. 
C) no two competing species can coexist indefinitely. 
D) no two species with identical niches can coexist indefinitely. 
E) None of the choices are correct. 
A) when two species occur together,competition is always prevented by some behavioral adjustment. 
B) no two species can coexist indefinitely. 
C) no two competing species can coexist indefinitely. 
D) no two species with identical niches can coexist indefinitely. 
E) None of the choices are correct.

Question 5

When the average mass of individual plants in a stand is plotted against stand density (log-transformed),the slope of the relationship is very often around

Accepted Answer

A) -1/2. 
B) -1. 
C) -3/2. 
D) +1/2. 
E) +3/2. 
A) -1/2. 
B) -1. 
C) -3/2. 
D) +1/2. 
E) +3/2.

Question 6

Ecologists sometimes use __________________ as simpler representations of the complex natural world.

Accepted Answer

A) character displacement 
B) mathematical or laboratory models 
C) competition coefficients 
D) replication 
E) None of the choices are correct. 
A) character displacement 
B) mathematical or laboratory models 
C) competition coefficients 
D) replication 
E) None of the choices are correct.

Question 7

Experiments with terrestrial isopods demonstrate that competition can occur only when food resources are limiting.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following statements about damselfish on Jamaican reefs is false?

Accepted Answer

A) Damselfish engage in both intraspecific and interspecific competition. 
B) Damselfish compete for territories they use for feeding. 
C) Damselfish attack intruders threatening their young. 
D) Damselfish without territories die. 
E) Competition in damselfish is "interference" competition. 
A) Damselfish engage in both intraspecific and interspecific competition. 
B) Damselfish compete for territories they use for feeding. 
C) Damselfish attack intruders threatening their young. 
D) Damselfish without territories die. 
E) Competition in damselfish is "interference" competition.

Question 9

Intraspecific competition for limited resources can play a key role in slowing population growth at high densities.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following is not included in the list of criteria that Taper and Case believe must be met to build a definitive case for character displacement?

Accepted Answer

A) Morphological differences between a pair of sympatric species are statistically greater than the differences between allopatric populations of the same species. 
B) The observed differences between sympatric and allopatric populations have a genetic basis. 
C) Variation in the character must have a known effect on the use of resources. 
D) There must be demonstrated competition for the resource under question and competition must be directly correlated with similarity in the character. 
E) All of the choices are included in the list of criteria that must be met to build a definitive case for character displacement. 
A) Morphological differences between a pair of sympatric species are statistically greater than the differences between allopatric populations of the same species. 
B) The observed differences between sympatric and allopatric populations have a genetic basis. 
C) Variation in the character must have a known effect on the use of resources. 
D) There must be demonstrated competition for the resource under question and competition must be directly correlated with similarity in the character. 
E) All of the choices are included in the list of criteria that must be met to build a definitive case for character displacement.

Self-thinning in a stand of trees

In the Lotka-Volterra competition equations,the parameter $\alpha$ ₁₂ relates to the

In the Lotka-Volterra competition model,the intersection of two isoclines of zero population growth always indicates stable coexistence of two competitors.

Gause's "competitive exclusion principle" states that

When the average mass of individual plants in a stand is plotted against stand density (log-transformed),the slope of the relationship is very often around

Ecologists sometimes use __________________ as simpler representations of the complex natural world.

Experiments with terrestrial isopods demonstrate that competition can occur only when food resources are limiting.

Which of the following statements about damselfish on Jamaican reefs is false?

Intraspecific competition for limited resources can play a key role in slowing population growth at high densities.

Which of the following is not included in the list of criteria that Taper and Case believe must be met to build a definitive case for character displacement?

Introduction to Ecology: Historical Foundations and Developing Frontiers

Life on Land

Life in Water

Population Genetics and Natural Selection

Temperature Relations

Water Relations

Energy and Nutrient Relations

Social Relations

Population Distribution and Abundance

Population Dynamics

Population Growth

Life Histories

Exploitative Interactions: Predation, herbivory, parasitism, and Disease

Mutualism

Species Abundance and Diversity

Species Interactions and Community Structure

Primary Production and Energy Flow

Nutrient Cycling and Retention

Succession and Stability

Landscape Ecology

Geographic Ecology

Global Ecology

Filters

Exam 13: Competition

Self-thinning in a stand of trees

In the Lotka-Volterra competition equations,the parameter α\alphaα 12 relates to the

In the Lotka-Volterra competition model,the intersection of two isoclines of zero population growth always indicates stable coexistence of two competitors.

Gause's "competitive exclusion principle" states that

When the average mass of individual plants in a stand is plotted against stand density (log-transformed),the slope of the relationship is very often around

Ecologists sometimes use __________________ as simpler representations of the complex natural world.

Experiments with terrestrial isopods demonstrate that competition can occur only when food resources are limiting.

Which of the following statements about damselfish on Jamaican reefs is false?

Intraspecific competition for limited resources can play a key role in slowing population growth at high densities.

Which of the following is not included in the list of criteria that Taper and Case believe must be met to build a definitive case for character displacement?

Introduction to Ecology: Historical Foundations and Developing Frontiers

Life on Land

Life in Water

Population Genetics and Natural Selection

Temperature Relations

Water Relations

Energy and Nutrient Relations

Social Relations

Population Distribution and Abundance

Population Dynamics

Population Growth

Life Histories

Exploitative Interactions: Predation, herbivory, parasitism, and Disease

Mutualism

Species Abundance and Diversity

Species Interactions and Community Structure

Primary Production and Energy Flow

Nutrient Cycling and Retention

Succession and Stability

Landscape Ecology

Geographic Ecology

Global Ecology

Filters

In the Lotka-Volterra competition equations,the parameter $\alpha$ ₁₂ relates to the