Question 1

An old pine tree in the front yard is beginning to die as the neighborhood deciduous trees have grown.Why might this be?

Accepted Answer

A) Deciduous trees have depleted the soil of nutrients. 
B) The pine tree is shade intolerant. 
C) The pine tree has depleted the soil of nutrients. 
D) Deciduous trees are shade intolerant. 
A) Deciduous trees have depleted the soil of nutrients. 
B) The pine tree is shade intolerant. 
C) The pine tree has depleted the soil of nutrients. 
D) Deciduous trees are shade intolerant. B

Question 2

In succession,which type of environmental change occurs when the physical environment changes,such as an increase in temperature or salinity?

Accepted Answer

A) allopatric 
B) allogenic 
C) autozygous 
D) autogenic 
A) allopatric 
B) allogenic 
C) autozygous 
D) autogenic B

Question 3

Early successional species are referred to as ________ species.

Accepted Answer

pioneer

Question 4

According to Grime,which strategy is followed by stress-tolerant species?

Accepted Answer

A) C strategy 
B) S strategy 
C) R strategy 
D) T strategy 
A) C strategy 
B) S strategy 
C) R strategy 
D) T strategy

Question 5

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 6

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 7

Chronosequences are useful because one can

Accepted Answer

A) view several taxa in one sere. 
B) view several seres in one region. 
C) measure the impacts of disturbance. 
D) count the number of trees in one sere. 
A) view several taxa in one sere. 
B) view several seres in one region. 
C) measure the impacts of disturbance. 
D) count the number of trees in one sere.

Question 8

Habitats in which resources are limited favor ________ species that allocate resources to maintenance.

Accepted Answer

The answer of Habitats in which resources are limited favor...

Question 9

Although community composition changes during succession,diversity rarely changes.

Accepted Answer

A) True 
 B)False

Question 10

Recent data indicate what regarding forests in eastern North America?

Accepted Answer

A) a steady increase in forest since the late 1800s 
B) no change over the past 200 years 
C) no change in the past 50 years 
D) a decline in forested area in the past 50 years 
A) a steady increase in forest since the late 1800s 
B) no change over the past 200 years 
C) no change in the past 50 years 
D) a decline in forested area in the past 50 years

Question 11

________ environmental change is a direct result of the organisms within the community.

Accepted Answer

The answer of ________ environmental change is a direct result...

Question 12

Early successional species are characterized by

Accepted Answer

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

Question 13

Succession does not occur in communities subjected to periodic disturbances.

Accepted Answer

A) True 
 B)False

Question 14

An example of secondary succession is

Accepted Answer

A) grasses colonizing sand dunes. 
B) lichens colonizing a rock. 
C) weeds colonizing a volcanic lava flow. 
D) crabgrass colonizing an abandoned wheat field. 
A) grasses colonizing sand dunes. 
B) lichens colonizing a rock. 
C) weeds colonizing a volcanic lava flow. 
D) crabgrass colonizing an abandoned wheat field.

Question 15

Which of the following is considered a ruderal species?

Accepted Answer

A) one that is a strong competitor 
B) one that colonizes well 
C) one that is highly stress tolerant 
D) one that requires abundant resources 
A) one that is a strong competitor 
B) one that colonizes well 
C) one that is highly stress tolerant 
D) one that requires abundant resources

Question 16

Autogenic environmental change always occurs in plant succession.

Accepted Answer

A) True 
 B)False

Question 17

The organismal view of communities is a ________ concept,while the continuum view of communities is a ________ concept.

Accepted Answer

The answer of The organismal view of communities is a...

Question 18

Which of the following are late successional species?

Accepted Answer

A) trees 
B) grass 
C) weeds 
D) forbs 
A) trees 
B) grass 
C) weeds 
D) forbs

Question 19

What is the resource-ratio hypothesis?

Accepted Answer

A) Late successional species are not affected by species of previous stages. 
B) There are three strategies in terms of resource use by plants. 
C) There is a pattern of changing allocation of carbon to aboveground and belowground tissues. 
D) The process of succession is determined by who gets there first. 
A) Late successional species are not affected by species of previous stages. 
B) There are three strategies in terms of resource use by plants. 
C) There is a pattern of changing allocation of carbon to aboveground and belowground tissues. 
D) The process of succession is determined by who gets there first.

Question 20

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

Accepted Answer

The answer of The ________ model of succession proposes that...

Exam 18: Community Dynamics

An old pine tree in the front yard is beginning to die as the neighborhood deciduous trees have grown.Why might this be?

In succession,which type of environmental change occurs when the physical environment changes,such as an increase in temperature or salinity?

Early successional species are referred to as ________ species.

According to Grime,which strategy is followed by stress-tolerant species?

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

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

Chronosequences are useful because one can

Habitats in which resources are limited favor ________ species that allocate resources to maintenance.

Although community composition changes during succession,diversity rarely changes.

Recent data indicate what regarding forests in eastern North America?

________ environmental change is a direct result of the organisms within the community.

Early successional species are characterized by

Succession does not occur in communities subjected to periodic disturbances.

An example of secondary succession is

Which of the following is considered a ruderal species?

Autogenic environmental change always occurs in plant succession.

The organismal view of communities is a ________ concept,while the continuum view of communities is a ________ concept.

Which of the following are late successional species?

What is the resource-ratio hypothesis?

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

The Nature of Ecology

Climate

The Aquatic Environment

The Terrestrial Environment

Adaptation and Natural Selection

Plant Adaptations to the Environment

Animal Adaptations to the Environment

Properties of Populations

Population Growth

Life History

Intraspecific Population Regulation

Species Interactions, population Dynamics, and Natural Selection

Interspecific Competition

Predation

Parasitism and Mutualism

Community Structure

Factors Influencing the Structure of Communities

Landscape Dynamics

Ecosystem Energetics

Decomposition and Nutrient Cycling

Biogeochemical Cycles

Terrestrial Ecosystems

Aquatic Ecosystems

Coastal and Wetland Ecosystems

Large-Scale Patterns of Biological Diversity

The Ecology of Climate Change

Filters

The organismal view of communities is a concept,while the continuum view of communities is a concept.