Question 1

Which of the following species is not an ecosystem engineer?

Accepted Answer

A)  Elephant 
B)  Coral 
C)  Gopher tortoise 
D)  Beaver 
E)  Pisaster starfish 
A)  Elephant 
B)  Coral 
C)  Gopher tortoise 
D)  Beaver 
E)  Pisaster starfish E

Question 2

Interaction strengths between species are represented by

Accepted Answer

A)  Connectedness webs 
B)  Energy webs 
C)  Functional webs 
D)  Decomposer webs 
A)  Connectedness webs 
B)  Energy webs 
C)  Functional webs 
D)  Decomposer webs B

Question 3

In a variety of food webs, connectance increases as food web species richness increases.

Accepted Answer

A) True 
 B)False  False

Question 4

Birds and mammals typically have production efficiencies in the range of

Accepted Answer

A)  1-2% 
B)  5-10% 
C)  10-20% 
D)  20-50% 
E)  50-100% 
A)  1-2% 
B)  5-10% 
C)  10-20% 
D)  20-50% 
E)  50-100%

Question 5

In food webs the quantity "actual number of links/potential number of links" is known as

Accepted Answer

A)  Linkage density 
B)  The pyramid of numbers 
C)  Trophic level of efficiency 
D)  Connectance 
E)  Food web dominance 
A)  Linkage density 
B)  The pyramid of numbers 
C)  Trophic level of efficiency 
D)  Connectance 
E)  Food web dominance

Question 6

In comparing his results from the Coachella Valley food web to other published food webs, Gary Polis found _______ links per species and ________ numbers of prey species per predator.

Accepted Answer

A)  More, fewer 
B)  Fewer, higher 
C)  Fewer, fewer 
D)  More, greater 
E)  Higher, no differences in 
A)  More, fewer 
B)  Fewer, higher 
C)  Fewer, fewer 
D)  More, greater 
E)  Higher, no differences in

Question 7

Food webs are based on living material, not dead material.

Accepted Answer

A) True 
 B)False

Question 8

If ln=100, An=20 and Prodn=10, what is the assimilation efficiency?

Accepted Answer

A)  10% 
B)  20% 
C)  50% 
D)  500% 
E)  1000% 
A)  10% 
B)  20% 
C)  50% 
D)  500% 
E)  1000%

Question 9

An oak tree can support hundreds of caterpillars and other herbivorous species and the same number, or greater, of insects parasitic on the herbivores. This is an example of a(n)

Accepted Answer

A)  Pyramid of biomass 
B)  Inverted pyramid of numbers 
C)  Pyramid of energy 
D)  Inverted pyramid of biomass 
A)  Pyramid of biomass 
B)  Inverted pyramid of numbers 
C)  Pyramid of energy 
D)  Inverted pyramid of biomass

Question 10

Ecosystem engineers

Accepted Answer

A)  Create, modify and maintain habitat 
B)  Have a role out of proportion with their abundance or biomass 
C)  Have habitat requirements so large that protecting them would protect other species 
D)  Provide information on the overall health of an ecosystem 
A)  Create, modify and maintain habitat 
B)  Have a role out of proportion with their abundance or biomass 
C)  Have habitat requirements so large that protecting them would protect other species 
D)  Provide information on the overall health of an ecosystem

Question 11

Organisms that eat primary consumers are called

Accepted Answer

A)  Herbivores 
B)  Carnivores 
C)  Detritivores 
D)  Autotrophs 
E)  Producers 
A)  Herbivores 
B)  Carnivores 
C)  Detritivores 
D)  Autotrophs 
E)  Producers

Question 12

Tropical fruit trees are vital to the survival of toucans, monkeys and other fruit eaters and can be thought of as

Accepted Answer

A)  Flagship species 
B)  Secondary producers 
C)  Keystone species 
D)  Heterotrophs 
E)  Indicator species 
A)  Flagship species 
B)  Secondary producers 
C)  Keystone species 
D)  Heterotrophs 
E)  Indicator species

Question 13

Polar bears can be thought of as

Accepted Answer

A)  Survivor species 
B)  Ecosystem engineers 
C)  Indicator species 
D)  Umbrella species 
E)  Invasive species 
A)  Survivor species 
B)  Ecosystem engineers 
C)  Indicator species 
D)  Umbrella species 
E)  Invasive species

Question 14

Carnivores can feed at multiple trophic levels.

Accepted Answer

A) True 
 B)False

Question 15

A caterpillar ingests 500J from its food, 200J is used in cellular respiration, 180J of feces is produced and 120J goes to growth, what is the production efficiency?

Accepted Answer

A)  18% 
B)  36% 
C)  40% 
D)  64% 
E)  80% 
A)  18% 
B)  36% 
C)  40% 
D)  64% 
E)  80%

Question 16

Which of the following is a keystone species?

Accepted Answer

A)  The Florida panther 
B)  A rare rhinovirus that induces a cold in a wildebeest 
C)  A rare distemper virus that kills lions 
D)  Salt marsh chordgrass 
E)  The Panda 
A)  The Florida panther 
B)  A rare rhinovirus that induces a cold in a wildebeest 
C)  A rare distemper virus that kills lions 
D)  Salt marsh chordgrass 
E)  The Panda

Question 17

The total biomass in an ecosystem at any one point in time is known as the standing crop.

Accepted Answer

A) True 
 B)False

Question 18

The proportion of production at one level that is eaten by, or ingested, by the next trophic level is called

Accepted Answer

A)  Consumption efficiency 
B)  Production efficiency 
C)  Assimilation efficiency 
D)  Trophic efficiency 
E)  Trophic level efficiency 
A)  Consumption efficiency 
B)  Production efficiency 
C)  Assimilation efficiency 
D)  Trophic efficiency 
E)  Trophic level efficiency

Question 19

If there are 20 species in a food web, what are the potential number of links, assuming links go only in one direction?

Accepted Answer

A)  150 
B)  190 
C)  320 
D)  380 
E)  500 
A)  150 
B)  190 
C)  320 
D)  380 
E)  500

Question 20

Tropical fruit trees are dominant species not keystone species.

Accepted Answer

A) True 
 B)False

Exam 25: Food Webs and Energy Flow

Which of the following species is not an ecosystem engineer?

Interaction strengths between species are represented by

In a variety of food webs, connectance increases as food web species richness increases.

Birds and mammals typically have production efficiencies in the range of

In food webs the quantity "actual number of links/potential number of links" is known as

In comparing his results from the Coachella Valley food web to other published food webs, Gary Polis found _______ links per species and ________ numbers of prey species per predator.

Food webs are based on living material, not dead material.

If ln=100, An=20 and Prodn=10, what is the assimilation efficiency?

An oak tree can support hundreds of caterpillars and other herbivorous species and the same number, or greater, of insects parasitic on the herbivores. This is an example of a(n)

Ecosystem engineers

Organisms that eat primary consumers are called

Tropical fruit trees are vital to the survival of toucans, monkeys and other fruit eaters and can be thought of as

Polar bears can be thought of as

Carnivores can feed at multiple trophic levels.

A caterpillar ingests 500J from its food, 200J is used in cellular respiration, 180J of feces is produced and 120J goes to growth, what is the production efficiency?

Which of the following is a keystone species?

The total biomass in an ecosystem at any one point in time is known as the standing crop.

The proportion of production at one level that is eaten by, or ingested, by the next trophic level is called

If there are 20 species in a food web, what are the potential number of links, assuming links go only in one direction?

Tropical fruit trees are dominant species not keystone species.

An Introduction to Ecology

Population Genetics

Natural Selection, Speciation, and Extinction

Behavioral Ecology

Temperature

Water

Nutrients

Demographic Techniques and Population Patterns

Life Tables and Demography

Population Growth

Competition and Coexistence

Facilitation

Predation

Herbivory

Parasitism

Population Regulation

Species Diversity

Species Richness Patterns

Species Richness and Community Services

Succession

Island Biogeography

Terrestrial Biomes

Marine Biomes

Freshwater Biomes

Biomass Production

Biogeochemical Cycles

Filters

In comparing his results from the Coachella Valley food web to other published food webs, Gary Polis found _ links per species and __ numbers of prey species per predator.

If l_n=100, A_n=20 and Prod_n=10, what is the assimilation efficiency?