Question 1

Which technique allows measurement of conditions on Earth from a distant location?

Accepted Answer

A)  remote sensing 
B)  remote monitoring 
C)  satellite sensing 
D)  satellite monitoring 
A)  remote sensing 
B)  remote monitoring 
C)  satellite sensing 
D)  satellite monitoring A

Question 2

NPP varies with _____ around the world.

Accepted Answer

A)  elevation 
B)  soil type 
C)  longitude 
D)  latitude 
A)  elevation 
B)  soil type 
C)  longitude 
D)  latitude D

Question 3

Net production energy divided by assimilation energy is _____ efficiency.

Accepted Answer

A)  consumption 
B)  assimilation 
C)  net assimilation 
D)  net production 
A)  consumption 
B)  assimilation 
C)  net assimilation 
D)  net production D

Question 4

The 10 percent ecological efficiency rule of thumb has implications for humans in what way?

Accepted Answer

A)  The 10 percent rule can instruct humans as to which systems need the most protection. 
B)  Understanding the 10 percent rule might protect species from extinction. 
C)  Recognizing the 10 percent efficiency rule may provide insight into future human diets on an increasingly populated planet. 
D)  The 10 percent ecological efficiency rule points to the open ocean as a means to increase worldwide food production. 
A)  The 10 percent rule can instruct humans as to which systems need the most protection. 
B)  Understanding the 10 percent rule might protect species from extinction. 
C)  Recognizing the 10 percent efficiency rule may provide insight into future human diets on an increasingly populated planet. 
D)  The 10 percent ecological efficiency rule points to the open ocean as a means to increase worldwide food production.

Question 5

Aquatic NPP is primarily limited by

Accepted Answer

A)  fertility. 
B)  light. 
C)  temperature. 
D)  salinity. 
A)  fertility. 
B)  light. 
C)  temperature. 
D)  salinity.

Question 6

The percentage of energy or biomass in a trophic level that is consumed by the next higher trophic level is called _____ efficiency.

Accepted Answer

A)  consumption 
B)  predation 
C)  assimilation 
D)  net production 
A)  consumption 
B)  predation 
C)  assimilation 
D)  net production

Question 7

Silicon is used primarily by

Accepted Answer

A)  zooxanthellae. 
B)  zooplankton. 
C)  diatoms. 
D)  algae. 
A)  zooxanthellae. 
B)  zooplankton. 
C)  diatoms. 
D)  algae.

Question 8

Why when measuring primary productivity is O2 uptake perhaps a more reliable technique than CO2 uptake?

Accepted Answer

The question seems to be referring to th

Question 9

Why have non-native earthworms caused a decline in salamander populations in North America?

Accepted Answer

A)  Earthworms are predators of newly hatched salamanders. 
B)  Earthworms caused reductions in insects that salamanders eat. 
C)  Earthworms disturb soil, which makes it less hospitable to salamanders. 
D)  Earthworms outcompete salamanders for soil nutrients. 
A)  Earthworms are predators of newly hatched salamanders. 
B)  Earthworms caused reductions in insects that salamanders eat. 
C)  Earthworms disturb soil, which makes it less hospitable to salamanders. 
D)  Earthworms outcompete salamanders for soil nutrients.

Question 10

Aquatic ecosystems can be limited by silicon because

Accepted Answer

A)  there are few silicon organisms in the upper waters. 
B)  many organisms compete for the silicon. 
C)  silicon sinks slower than nitrogen or phosphorus. 
D)  silicon sinks faster than nitrogen or phosphorus. 
A)  there are few silicon organisms in the upper waters. 
B)  many organisms compete for the silicon. 
C)  silicon sinks slower than nitrogen or phosphorus. 
D)  silicon sinks faster than nitrogen or phosphorus.

Question 11

Which is the portion of energy that an organism uses to maintain its body temperature?

Accepted Answer

A)  primary 
B)  secondary 
C)  egested 
D)  respired 
A)  primary 
B)  secondary 
C)  egested 
D)  respired

Question 12

The rate at which solar or chemical energy is captured and converted to chemical bonds by photosynthesis or chemosynthesis is called

Accepted Answer

A)  secondary productivity. 
B)  net primary productivity. 
C)  gross primary productivity. 
D)  primary productivity 
A)  secondary productivity. 
B)  net primary productivity. 
C)  gross primary productivity. 
D)  primary productivity

Question 13

Energy that an organism uses to add to its biomass is

Accepted Answer

A)  egested. 
B)  respired. 
C)  assimilated. 
D)  secondary. 
A)  egested. 
B)  respired. 
C)  assimilated. 
D)  secondary.

Question 14

When an animal eats fruit with hard seeds that cannot be digested and are excreted whole as a waste product, the seeds constitute _____ energy.

Accepted Answer

A)  assimilated 
B)  egested 
C)  respired 
D)  kinetic 
A)  assimilated 
B)  egested 
C)  respired 
D)  kinetic

Question 15

The biomass of producers in a given area of an ecosystem at a particular moment is called

Accepted Answer

A)  net primary production. 
B)  ecosystem mass. 
C)  the standing crop. 
D)  the standing harvest. 
A)  net primary production. 
B)  ecosystem mass. 
C)  the standing crop. 
D)  the standing harvest.

Question 16

In terms of NPP (net primary productivity), the most productive terrestrial systems are found in _____, while the most productive aquatic systems are found in _____.

Accepted Answer

A)  temperate forests; open ocean 
B)  boreal forest; salt marshes 
C)  savannas; coral reefs 
D)  tropical forests; freshwater marshes 
A)  temperate forests; open ocean 
B)  boreal forest; salt marshes 
C)  savannas; coral reefs 
D)  tropical forests; freshwater marshes

Question 17

What term describes the total mass of trees, shrubs, herbaceous plants, and grasses present in a given forest on a given day?

Accepted Answer

A)  NPP, or net primary productivity 
B)  GPP, or gross primary productivity 
C)  primary productivity 
D)  standing crop 
A)  NPP, or net primary productivity 
B)  GPP, or gross primary productivity 
C)  primary productivity 
D)  standing crop

Question 18

Which of the following is NOT a high-productivity aquatic ecosystem?

Accepted Answer

A)  estuary 
B)  coral reef 
C)  salt marsh 
D)  open ocean 
A)  estuary 
B)  coral reef 
C)  salt marsh 
D)  open ocean

Question 19

(Figure 20.9) The figure shows that as mean annual temperature increases, net primary productivity also increases. Net primary productivity increases with mean annual precipitation until approximately 3 meters of precipitation, after which productivity declines. Why does this decline occur?

Accepted Answer

The answer of   (Figure 20.9) The figure shows...

Question 20

Differentiate between gross primary productivity (GPP) and net primary productivity (NPP).

Accepted Answer

Gross Primary Productivity (GPP) and Net

Exam 20: Movement of Energy in Ecosystems

Which technique allows measurement of conditions on Earth from a distant location?

NPP varies with _____ around the world.

Net production energy divided by assimilation energy is _____ efficiency.

The 10 percent ecological efficiency rule of thumb has implications for humans in what way?

Aquatic NPP is primarily limited by

The percentage of energy or biomass in a trophic level that is consumed by the next higher trophic level is called _____ efficiency.

Silicon is used primarily by

Why when measuring primary productivity is O2 uptake perhaps a more reliable technique than CO2 uptake?

Why have non-native earthworms caused a decline in salamander populations in North America?

Aquatic ecosystems can be limited by silicon because

Which is the portion of energy that an organism uses to maintain its body temperature?

The rate at which solar or chemical energy is captured and converted to chemical bonds by photosynthesis or chemosynthesis is called

Energy that an organism uses to add to its biomass is

When an animal eats fruit with hard seeds that cannot be digested and are excreted whole as a waste product, the seeds constitute _____ energy.

The biomass of producers in a given area of an ecosystem at a particular moment is called

In terms of NPP (net primary productivity), the most productive terrestrial systems are found in _____, while the most productive aquatic systems are found in _____.

What term describes the total mass of trees, shrubs, herbaceous plants, and grasses present in a given forest on a given day?

Which of the following is NOT a high-productivity aquatic ecosystem?

(Figure 20.9) The figure shows that as mean annual temperature increases, net primary productivity also increases. Net primary productivity increases with mean annual precipitation until approximately 3 meters of precipitation, after which productivity declines. Why does this decline occur?

Differentiate between gross primary productivity (GPP) and net primary productivity (NPP).

Introduction: Ecology, Evolution, and the Scientific Method

Adaptations to Aquatic Environments

Adaptations to Terrestrial Environments

Adaptations to Variable Environments

Climates and Soils

Terrestrial and Aquatic Biomes

Evolution and Adaptation

Life Histories

Reproductive Strategies

Social Behaviors

Population Distributions

Population Growth and Regulation

Population Dynamics Over Space and Time

Predation and Herbivory

Parasitism and Infectious Diseases

Competition

Mutualism

Community Structure

Community Succession

Movement of Elements in Ecosystems

Landscape Ecology and Global Biodiversity

Global Conservation of Biodiversity

Filters

Exam 20: Movement of Energy in Ecosystems　

Why when measuring primary productivity is O₂ uptake perhaps a more reliable technique than CO₂ uptake?

In terms of NPP (net primary productivity), the most productive terrestrial systems are found in _, while the most productive aquatic systems are found in _.