Question 1

On the Serengeti plain of eastern Africa, large grazing mammals consume what fraction of total primary production?

Accepted Answer

A)  a negligibly small amount 
B)  about 10% 
C)  about 25% 
D)  about 66% 
E)  nearly all 
A)  a negligibly small amount 
B)  about 10% 
C)  about 25% 
D)  about 66% 
E)  nearly all

Question 2

Which of the following is the correct relationship between gross primary production (GPP), net primary production (NPP), and respiration (RESP)?

Accepted Answer

A)  GPP = NPP - RESP 
B)  RESP = GPP + NPP 
C)  NPP = GPP - RESP 
D)  NPP = GPP + RESP 
E)  None of the choices are correct. 
A)  GPP = NPP - RESP 
B)  RESP = GPP + NPP 
C)  NPP = GPP - RESP 
D)  NPP = GPP + RESP 
E)  None of the choices are correct.

Question 3

Nitrogen stable isotopes are useful tools for the study of food web structure because isotope ratios

Accepted Answer

A)  change in predictable ways across trophic levels. 
B)  often vary among alternative food sources for a consumer. 
C)  for a predator exactly match the isotope ratio in its prey. 
D)  both change in predictable ways across trophic levels and often vary among alternative food sources for a consumer. 
A)  change in predictable ways across trophic levels. 
B)  often vary among alternative food sources for a consumer. 
C)  for a predator exactly match the isotope ratio in its prey. 
D)  both change in predictable ways across trophic levels and often vary among alternative food sources for a consumer.

Question 4

Primary producers make up the first, or basal, ____________ in most food webs.

Accepted Answer

The answer of Primary producers make up the first, or...

Question 5

The "trophic cascade hypothesis" emphasizes the role of

Accepted Answer

A)  nutrients in controlling primary productivity. 
B)  nutrients in controlling primary consumption. 
C)  consumers in controlling primary productivity. 
D)  grazing by herbivores in controlling ecosystem nutrient levels. 
E)  primary productivity in controlling primary and secondary consumption. 
A)  nutrients in controlling primary productivity. 
B)  nutrients in controlling primary consumption. 
C)  consumers in controlling primary productivity. 
D)  grazing by herbivores in controlling ecosystem nutrient levels. 
E)  primary productivity in controlling primary and secondary consumption.

Question 6

The number of trophic levels in an ecosystem is limited by

Accepted Answer

A)  the number of tertiary consumers. 
B)  the loss of energy with each transfer between trophic levels. 
C)  the gain of energy with each transfer between trophic levels. 
D)  the rate at which organisms can recycle energy within the ecosystem. 
E)  the rate at which secondary consumers consume their prey. 
A)  the number of tertiary consumers. 
B)  the loss of energy with each transfer between trophic levels. 
C)  the gain of energy with each transfer between trophic levels. 
D)  the rate at which organisms can recycle energy within the ecosystem. 
E)  the rate at which secondary consumers consume their prey.

Question 7

The influences of nutrients and temperatures on ecosystem properties are part of what ecologists call "bottom-up controls."

Accepted Answer

A) True 
 B)False

Question 8

On the Serengeti plain of eastern Africa, intensive grazing by large mammals greatly decreases primary productivity in the grazed areas.

Accepted Answer

A) True 
 B)False

Question 9

In Stephen Carpenter and colleagues' manipulations of lake food webs, increased densities of adult largemouth bass led to

Accepted Answer

A)  increased rates of grazing on phytoplankton by zooplankton. 
B)  decreased rates of grazing on phytoplankton by zooplankton. 
C)  increased population sizes of planktivorous fish. 
D)  increased consumption of zooplankton by planktivorous fish. 
E)  no noticeable effects on food web structure. 
A)  increased rates of grazing on phytoplankton by zooplankton. 
B)  decreased rates of grazing on phytoplankton by zooplankton. 
C)  increased population sizes of planktivorous fish. 
D)  increased consumption of zooplankton by planktivorous fish. 
E)  no noticeable effects on food web structure.

Question 10

The production of new organic matter, or biomass, by autotrophs in a system is called ____________.

Accepted Answer

A)  primary production 
B)  primary construction 
C)  trophic production 
D)  trophic gain 
E)  autotrophic gain 
A)  primary production 
B)  primary construction 
C)  trophic production 
D)  trophic gain 
E)  autotrophic gain

On the Serengeti plain of eastern Africa, large grazing mammals consume what fraction of total primary production?

Which of the following is the correct relationship between gross primary production (GPP), net primary production (NPP), and respiration (RESP)?

Nitrogen stable isotopes are useful tools for the study of food web structure because isotope ratios

Primary producers make up the first, or basal, ____________ in most food webs.

The "trophic cascade hypothesis" emphasizes the role of

The number of trophic levels in an ecosystem is limited by

The influences of nutrients and temperatures on ecosystem properties are part of what ecologists call "bottom-up controls."

On the Serengeti plain of eastern Africa, intensive grazing by large mammals greatly decreases primary productivity in the grazed areas.

In Stephen Carpenter and colleagues' manipulations of lake food webs, increased densities of adult largemouth bass led to

The production of new organic matter, or biomass, by autotrophs in a system is called ____________.

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

Species Interactions and Community Structure

Nutrient Cycling and Retention

Succession and Stability

Landscape Ecology

Geographic Ecology

Global Ecology

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Exam 18: Primary Production and Energy Flow

On the Serengeti plain of eastern Africa, large grazing mammals consume what fraction of total primary production?

Which of the following is the correct relationship between gross primary production (GPP), net primary production (NPP), and respiration (RESP)?

Nitrogen stable isotopes are useful tools for the study of food web structure because isotope ratios

Primary producers make up the first, or basal, ____________ in most food webs.

The "trophic cascade hypothesis" emphasizes the role of

The number of trophic levels in an ecosystem is limited by

The influences of nutrients and temperatures on ecosystem properties are part of what ecologists call "bottom-up controls."

On the Serengeti plain of eastern Africa, intensive grazing by large mammals greatly decreases primary productivity in the grazed areas.

In Stephen Carpenter and colleagues' manipulations of lake food webs, increased densities of adult largemouth bass led to

The production of new organic matter, or biomass, by autotrophs in a system is called ____________.

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

Species Interactions and Community Structure

Nutrient Cycling and Retention

Succession and Stability

Landscape Ecology

Geographic Ecology

Global Ecology

Filters