Question 1

Succession occurs in both aquatic and terrestrial environments.

Accepted Answer

A) True 
 B)False  True

Question 2

The ________ model of succession proposes that later successional species are neither inhibited nor aided by species of earlier stages.

Accepted Answer

tolerance

Question 3

The monoclimax hypothesis views succession as the gradual and progressive development of the community to the ultimate stage.

Accepted Answer

A) True 
 B)False  True

Question 4

The sequence of communities from the pioneer community to the climax community is called a(n)________.

Accepted Answer

The answer of The sequence of communities from the pioneer...

Question 5

The number of species within a community is usually greatest when

Accepted Answer

A) no disturbance occurs. 
B) a low frequency of disturbance occurs. 
C) an intermediate frequency of disturbance occurs. 
D) a high rate of disturbance occurs 
A) no disturbance occurs. 
B) a low frequency of disturbance occurs. 
C) an intermediate frequency of disturbance occurs. 
D) a high rate of disturbance occurs

Question 6

Diversity often decreases during the later stages of succession.

Accepted Answer

A) True 
 B)False

Question 7

Succession usually involves only autotrophic species such as plants.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following is an example of an allogenic change that drives succession?

Accepted Answer

A) seasonal changes in temperature,photoperiod,and light intensity 
B) increased shading of seedlings by adult trees in a forest 
C) increased nitrogen availability in soil due to the presence of leguminous plants 
D) reduced salinity due to surface shading by grasses in a salt marsh 
A) seasonal changes in temperature,photoperiod,and light intensity 
B) increased shading of seedlings by adult trees in a forest 
C) increased nitrogen availability in soil due to the presence of leguminous plants 
D) reduced salinity due to surface shading by grasses in a salt marsh

Question 9

The facilitation model of succession involves strong competitive interactions among colonizing species.

Accepted Answer

A) True 
 B)False

Question 10

Groups of sites within an area that are at different stages of succession are known as

Accepted Answer

A) autosequences. 
B) ecotypes. 
C) clines. 
D) chronosequences. 
A) autosequences. 
B) ecotypes. 
C) clines. 
D) chronosequences.

Question 11

The hypothesis that moderate frequencies of disturbance result in the highest species diversity is called the ________ disturbance hypothesis.

Accepted Answer

The answer of The hypothesis that moderate frequencies of disturbance...

Question 12

The initial floristic composition hypothesis proposes that the process of succession at any site is dependent on which species arrive first.

Accepted Answer

A) True 
 B)False

Question 13

Disturbances,such as fire,can sometimes increase coexistence between species and can increase diversity.

Accepted Answer

A) True 
 B)False

Question 14

Succession that occurs on a site that was previously unoccupied by another community is called ________ succession.

Accepted Answer

The answer of Succession that occurs on a site that...

Question 15

Most forests in the eastern United States are more than 100 years old.

Accepted Answer

A) True 
 B)False

Question 16

Early successional species are characterized by

Accepted Answer

A) low body growth rates. 
B) large body size. 
C) low degree of dispersal. 
D) low per capita population growth rate. 
A) low body growth rates. 
B) large body size. 
C) low degree of dispersal. 
D) low per capita population growth rate.

Question 17

Changes in community composition and structure over time are called

Accepted Answer

A) succession. 
B) stratification. 
C) zonation. 
D) characterization. 
A) succession. 
B) stratification. 
C) zonation. 
D) characterization.

Question 18

Early successional species are referred to as ________ species.

Accepted Answer

The answer of Early successional species are referred to as...

Question 19

Succession does not occur in communities subjected to periodic disturbances.

Accepted Answer

A) True 
 B)False

Question 20

The inhibition model of succession proposes that

Accepted Answer

A) early successional species modify the environment so that it becomes more suitable for later successional species. 
B) the first species to arrive make the site less suitable for later arriving species. 
C) later successional species are neither inhibited nor aided by species of earlier stages. 
D) competition does not occur between early successional and late successional species. 
A) early successional species modify the environment so that it becomes more suitable for later successional species. 
B) the first species to arrive make the site less suitable for later arriving species. 
C) later successional species are neither inhibited nor aided by species of earlier stages. 
D) competition does not occur between early successional and late successional species.

Exam 19: Community Dynamics

Succession occurs in both aquatic and terrestrial environments.

The ________ model of succession proposes that later successional species are neither inhibited nor aided by species of earlier stages.

The monoclimax hypothesis views succession as the gradual and progressive development of the community to the ultimate stage.

The sequence of communities from the pioneer community to the climax community is called a(n)________.

The number of species within a community is usually greatest when

Diversity often decreases during the later stages of succession.

Succession usually involves only autotrophic species such as plants.

Which of the following is an example of an allogenic change that drives succession?

The facilitation model of succession involves strong competitive interactions among colonizing species.

Groups of sites within an area that are at different stages of succession are known as

The hypothesis that moderate frequencies of disturbance result in the highest species diversity is called the ________ disturbance hypothesis.

The initial floristic composition hypothesis proposes that the process of succession at any site is dependent on which species arrive first.

Disturbances,such as fire,can sometimes increase coexistence between species and can increase diversity.

Succession that occurs on a site that was previously unoccupied by another community is called ________ succession.

Most forests in the eastern United States are more than 100 years old.

Early successional species are characterized by

Changes in community composition and structure over time are called

Early successional species are referred to as ________ species.

Succession does not occur in communities subjected to periodic disturbances.

The inhibition model of succession proposes that

The Nature of Ecology

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Species Interactions,population Dynamics,and Natural Selection

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Community Structure

Factors Influencing the Structure of Communities

Landscape Dynamics

Ecosystem Energetics

Decomposition and Nutrient Cycling

Biogeochemical Cycles

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Large-Scale Patterns of Biological Diversity

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