Question 1

In Jane Lubchenco's tidepool system,removal of the herbivorous snail Littorina led to

Accepted Answer

A)  dominance of the tidepools by the unpalatable alga Chondrus. 
B)  replacement of Chondrus by the more palatable alga Enteromorpha. 
C)  replacement of Chondrus by other algae better adapted to herbivory. 
D)  replacement of Enteromorpha by other algae that are better competitors. 
E)  no marked change in the algal community. 
A)  dominance of the tidepools by the unpalatable alga Chondrus. 
B)  replacement of Chondrus by the more palatable alga Enteromorpha. 
C)  replacement of Chondrus by other algae better adapted to herbivory. 
D)  replacement of Enteromorpha by other algae that are better competitors. 
E)  no marked change in the algal community.

Question 2

Ecologists summarize feeding interactions among species in a community when they compile a _________.

Accepted Answer

The answer of Ecologists summarize feeding interactions among species in...

Question 3

Weaver ants provide effective protection of citrus trees because they

Accepted Answer

A)  remove harmful soft-scale insects (mealybugs). 
B)  remove all plant-feeding insects. 
C)  cultivate soft-scale insects, but do not allow them to feed on the trees. 
D)  cultivate soft-scale insects, but still allow them to be attacked by parasitoids and predators. 
E)  None of the choices are correct. 
A)  remove harmful soft-scale insects (mealybugs). 
B)  remove all plant-feeding insects. 
C)  cultivate soft-scale insects, but do not allow them to feed on the trees. 
D)  cultivate soft-scale insects, but still allow them to be attacked by parasitoids and predators. 
E)  None of the choices are correct.

Question 4

A keystone species is one

Accepted Answer

A)  that makes up a very large proportion of total community biomass. 
B)  that feeds on a very large fraction of all available prey species. 
C)  that is fed on by a very large fraction of all predators in its community. 
D)  whose feeding activities have a disproportionate effect on the structure of its community. 
E)  that occupies the lowest level (the base) of the food web. 
A)  that makes up a very large proportion of total community biomass. 
B)  that feeds on a very large fraction of all available prey species. 
C)  that is fed on by a very large fraction of all predators in its community. 
D)  whose feeding activities have a disproportionate effect on the structure of its community. 
E)  that occupies the lowest level (the base) of the food web.

In Jane Lubchenco's tidepool system,removal of the herbivorous snail Littorina led to

Ecologists summarize feeding interactions among species in a community when they compile a _________.

Weaver ants provide effective protection of citrus trees because they

A keystone species is one

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

Socail Relations

Population Distribution and Abundance

Population Dynamics

Population Growth

Life Histories

Competition

Exploitative Interactions Predation, herbivory, parasitism, and Disease

Mutualism

Species Abundance and Diversity

Primary Production and Energy Flow

Nutrient Cycling and Retention

Succession and Stability

Landscape Ecology

Geographic Ecology

Global Ecology

Filters

Exam 17: Species Interactions and Community Structure

In Jane Lubchenco's tidepool system,removal of the herbivorous snail Littorina led to

Ecologists summarize feeding interactions among species in a community when they compile a _________.

Weaver ants provide effective protection of citrus trees because they

A keystone species is one

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

Socail Relations

Population Distribution and Abundance

Population Dynamics

Population Growth

Life Histories

Competition

Exploitative Interactions Predation, herbivory, parasitism, and Disease

Mutualism

Species Abundance and Diversity

Primary Production and Energy Flow

Nutrient Cycling and Retention

Succession and Stability

Landscape Ecology

Geographic Ecology

Global Ecology

Filters