Question 1

In 1993, an unknown virus infecting humans was determined to be a pathogen carried by

Accepted Answer

In 1993, the Hantavirus outbreak in the Four Corners region of the United States was linked to deer mice, which were identified as the carriers of the virus.

Question 2

Based on examples from the text, which statement about studies of zoonotic disease transmission is false?

Accepted Answer

A study in Panama found that experimentally reducing small mammal diversity actually increased hantavirus infection in individuals of host species, not decreased it.

Question 3

Which statement about zebra mussels in North America is true?

Accepted Answer

Zebra mussels were introduced to North America through ballast water discharged by ships into the Great Lakes. They are filter feeders, not predators, and they are known to foul infrastructure by attaching to surfaces. They actually decrease phytoplankton populations by consuming them.

Question 4

What aspect of community membership do humans most impact that leads to invasive species?

Accepted Answer

The answer of What aspect of community membership do humans...

Question 5

Which one of the following factors most determines the highest possible number of species within a local community?

Accepted Answer

The regional species pool determines the highest possible number of species because it represents the total set of species that could potentially colonize and establish in a local community.

Question 6

A grounds crew manager of a large park is tasked with guarding the land against invading species. He is aware that a certain weedy plant could not withstand average winter conditions in the area, but it could survive during a particularly mild winter. The most conservative conclusion the manager might come to about the risk of this plant as an invasive species is that the plant

Accepted Answer

The manager should consider that individual plants might have varying capabilities to survive mild winters, making the plant a potential invader.

Question 7

Maron and Vila (2001) found that native herbivores

Accepted Answer

Native herbivores can reduce the spread of non-native plants by feeding on them, thus limiting their growth and reproduction.

Question 8

A weed that is ordinarily invasive is unable to establish itself in a meadow community because the roots of other plant species produce chemicals that retard its growth. This is an example of

Accepted Answer

Biotic resistance occurs when native species in a community prevent the establishment and spread of invasive species through mechanisms such as competition or chemical inhibition.

Question 9

How does climate change impact invasive species?

Accepted Answer

Climate change impacts invasive species by altering the environment, changing species distribution, and affecting competitive interactions, making all options correct.

Question 10

According to the concept of resource partitioning, which combination of attributes of a community would tend to lead to higher species richness?

Accepted Answer

High specialization across a broad resource spectrum allows more species to coexist by reducing competition and utilizing different resources or niches.

Question 11

Refer to the figure.
 Robert MacArthur studied different species of warblers in New England forests that feed on the same prey within the tree canopy. His detailed figures of their activity within the canopy suggest that the different species

Accepted Answer

The answer of Refer to the figure.
 Robert MacArthur studied...

Question 12

Refer to the figure.
 Robert and John MacArthur found that in both tropical and temperate habitat, bird species diversity _______ as plant diversity increased and _______ as foliage height diversity increased.

Accepted Answer

The answer of Refer to the figure.
 Robert and John...

Question 13

Refer to the figure.
 The figure is based on the studies by Robert and John MacArthur. Which figure best describes the relationship between foliage height diversity and species diversity?

Accepted Answer

The answer of Refer to the figure.
 The figure is...

Question 14

Tilman's experiments of the resource ratio hypothesis with two species of diatoms showed that the species could coexist

Accepted Answer

Tilman's experiments demonstrated that two species of diatoms could coexist when the ratio of silica to phosphorus was at an intermediate level, supporting the resource ratio hypothesis.

Question 15

Which statement is not an assumption of the resource partitioning theory?

Accepted Answer

Resource partitioning theory assumes that species use resources in different ways and that resources are limiting, leading to niche differentiation. It does not assume differences in intrinsic population growth rates.

Question 16

Refer to the table.
 A research team is examining competitive outcomes between two species of diatoms, A and B. The team has manipulated levels of silica and phosphorus and examined whether species A won the competition, species B won the competition, or whether there was co-existence between the two species (C). The results are shown in the table. From these results the team concluded that

Accepted Answer

The answer of Refer to the table.
 A research team...

Question 17

The first person to recognize the importance of disturbance in promoting species diversity was _______, who noted that more species persisted on a section of lawn that was mowed regularly than on one that was not mowed.

Accepted Answer

The answer of The first person to recognize the importance...

Question 18

What is the "paradox of the plankton"?

Accepted Answer

The "paradox of the plankton" refers to the observation that there are many more species of phytoplankton in environments like temperate freshwater lakes than would be expected given the limited types of resources available, which challenges traditional ecological theories of competitive exclusion.

Question 19

What was Hutchinson's explanation for the "paradox of the plankton"?

Accepted Answer

Hutchinson's explanation for the "paradox of the plankton" was that seasonal changes in environmental conditions prevent any one species from becoming dominant and competitively excluding others, allowing for the coexistence of multiple species.

Question 20

According to Hutchinson's model for coexistence of plankton species, coexistence is likely when environmental change takes place _______ the process _______.

Accepted Answer

Hutchinson's model suggests that coexistence is likely when environmental changes occur at about the same rate as competitive exclusion, allowing multiple species to coexist without one outcompeting the others too quickly.

Quiz 19: Species Diversity in Communities

In 1993, an unknown virus infecting humans was determined to be a pathogen carried by

Based on examples from the text, which statement about studies of zoonotic disease transmission is false?

Which statement about zebra mussels in North America is true?

What aspect of community membership do humans most impact that leads to invasive species?

Which one of the following factors most determines the highest possible number of species within a local community?

Maron and Vila (2001) found that native herbivores

A weed that is ordinarily invasive is unable to establish itself in a meadow community because the roots of other plant species produce chemicals that retard its growth. This is an example of

How does climate change impact invasive species?

According to the concept of resource partitioning, which combination of attributes of a community would tend to lead to higher species richness?

Refer to the figure. Robert MacArthur studied different species of warblers in New England forests that feed on the same prey within the tree canopy. His detailed figures of their activity within the canopy suggest that the different species

Refer to the figure. Robert and John MacArthur found that in both tropical and temperate habitat, bird species diversity _ as plant diversity increased and _ as foliage height diversity increased.

Refer to the figure. The figure is based on the studies by Robert and John MacArthur. Which figure best describes the relationship between foliage height diversity and species diversity?

Tilman's experiments of the resource ratio hypothesis with two species of diatoms showed that the species could coexist

Which statement is not an assumption of the resource partitioning theory?

The first person to recognize the importance of disturbance in promoting species diversity was _______, who noted that more species persisted on a section of lawn that was mowed regularly than on one that was not mowed.

What is the "paradox of the plankton"?

What was Hutchinson's explanation for the "paradox of the plankton"?

According to Hutchinson's model for coexistence of plankton species, coexistence is likely when environmental change takes place _ the process _.

Quiz 19: Species Diversity in Communities

In 1993, an unknown virus infecting humans was determined to be a pathogen carried by

Based on examples from the text, which statement about studies of zoonotic disease transmission is false?

Which statement about zebra mussels in North America is true?

What aspect of community membership do humans most impact that leads to invasive species?

Which one of the following factors most determines the highest possible number of species within a local community?

Maron and Vila (2001) found that native herbivores

A weed that is ordinarily invasive is unable to establish itself in a meadow community because the roots of other plant species produce chemicals that retard its growth. This is an example of

How does climate change impact invasive species?

According to the concept of resource partitioning, which combination of attributes of a community would tend to lead to higher species richness?

Refer to the figure. Robert MacArthur studied different species of warblers in New England forests that feed on the same prey within the tree canopy. His detailed figures of their activity within the canopy suggest that the different species

Refer to the figure. Robert and John MacArthur found that in both tropical and temperate habitat, bird species diversity _______ as plant diversity increased and _______ as foliage height diversity increased.

Refer to the figure. The figure is based on the studies by Robert and John MacArthur. Which figure best describes the relationship between foliage height diversity and species diversity?

Tilman's experiments of the resource ratio hypothesis with two species of diatoms showed that the species could coexist

Which statement is not an assumption of the resource partitioning theory?

The first person to recognize the importance of disturbance in promoting species diversity was _______, who noted that more species persisted on a section of lawn that was mowed regularly than on one that was not mowed.

What is the "paradox of the plankton"?

What was Hutchinson's explanation for the "paradox of the plankton"?

According to Hutchinson's model for coexistence of plankton species, coexistence is likely when environmental change takes place _______ the process _______.

Refer to the figure. Robert and John MacArthur found that in both tropical and temperate habitat, bird species diversity _ as plant diversity increased and _ as foliage height diversity increased.

According to Hutchinson's model for coexistence of plankton species, coexistence is likely when environmental change takes place _ the process _.