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The carrying capacity of an ecosystem is the same for all species that exist wi…

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Wize University Biology Textbook > Ecology

Introduction to Ecology

5 Activities

Wize University Biology Textbook > Ecology

Population Growth

6 Activities

The carrying capacity of an ecosystem is the same for all species that exist within it
More Introduction to Ecology Questions:
Which of the following explains why there are rarely more than five trophic levels in a food web?
Which of the following explains why there are rarely more than five trophic levels in a food web?
An organism that obtains energy and material from organic molecules is a:
In a forest community three species of rodents exists: mice, rats and voles. All three species eat the same types of nuts although they eat only what is appropriate for their size. A snake species that lives in this forest preys on all three rodents. One year, due to human intervention, the snake population is largely depleted and remains low for several years. Following this low species population there is an increase in the population of the rats while the voles and mice population decreases. What can be said about the snake in this ecosystem?
An example of a consumer is:
Which of the following regarding secondary consumers is most true?
An organism that obtains energy and material from organic molecules is a:
What is the ultimate source of energy for an ecosystem?
Which of the following is the best explanation as to why the net primary productivity in terrestrial ecosystems tend to increase towards the tropics?
Keystone species have profound effects on the structure and composition of an ecosystem because:
Which of the following does not cycle in an ecosystem?
True or False.
In an ecosystem, the initiation of energy flow is when a producer acquires inorganic nutrients from the environment.
True or False.
Biomass is calculated as the number of organisms multiplied by their weight.
Ecosystems are dependent on which fundamental pathways?
True or False.
Decomposers break down detritus.
An ecosystem possesses:
Which order of the following ecosystems is listed by an increase in primary productivity?
In a forest community three species of rodents exists: mice, rats and voles. All three species eat the same types of nuts although they eat only what is appropriate for their size. A snake species that lives in this forest preys on all three rodents. One year, due to human intervention, the snake population is largely depleted and remains low for several years. Following this low species population there is an increase in the population of the rats while the voles and mice population decreases.
What can be said about the snake in this ecosystem?
Which trophic level has the largest biomass?
Considering what you know about the average transfer of energy between trophic levels, what amount of energy would reach the third trophic level in the primary producers contain 500 units of energy.
You find that while the species can all be connected via different food chains that some of them eat “similar” organisms. Because of this you decide to organize a food map into more discrete groups.
What are these new groups?
Fungi are responsible for breaking down dead organic matter. In an ecosystem, they are called:
An example of a consumer is:
You are interested in understanding how an ecosystem functions with respects to the producers and consumers.
What sort of map should you construct?
Which of the following explains why there are rarely more than five trophic levels in a food web?
You are an ecologist trying to determine whether a population of rare sea lions will be able to grow and reproduce now that humans have invaded their habitat.
You know the following information:
the ambient temperature is consistently at 12 ̊C
You find that while the species can all be connected via different food chains that some of them eat "similar" organisms. Because of this you decide to organize the above map into more discrete groups. What are these new groups?
You are interested in understanding how an ecosystem functions with respects to the producers and consumers. What sort of map should you construct?
Which order of the following ecosystems is listed by an increase in primary productivity?
In a forest community three species of rodents exists: mice, rats and voles. All three species eat the same types of nuts although they eat only what is appropriate for their size. A snake species that lives in this forest preys on all three rodents. One year, due to human intervention, the snake population is largely depleted and remains low for several years. Following this low species population there is an increase in the population of the rats while the voles and mice population decreases. What can be said about the snake in this ecosystem?
Which trophic level has the largest biomass?
Which of the following explains why there are rarely more than five trophic levels in a food web?
Considering what you know about the average transfer of energy between trophic levels, what amount of energy would reach the third trophic level in the primary producers contain 500 units of energy.
Ecology Practice Problem 3
In a forest community three species of rodents exists: mice, rats and voles. All three species eat the same types of nuts although they eat only what is appropriate for their size. A snake species that lives in this forest preys on all three rodents. One year, due to human intervention, the snake population is largely depleted and remains low for several years. Following this low species population there is an increase in the population of the rats while the voles and mice population decreases. What can be said about the snake in this ecosystem?
Levels of Diversity
What is the difference between the following levels of organization?
Community and Ecosystem
Which of the following definitions is incorrect?
How do decomposers fit into the trophic level pyramid?
Which of the following statements is correct?
The least amount of useful energy flowing through a food chain is available to the:
Ecosystems are dependent on which fundamental pathways?
Decomposers break down detritus.
An example of a consumer is:
An ecosystem possesses:
More Population Growth Questions:
In a density dependent population growth mode, a sudden increase in population size will cause the population growth rate to:
Which of the following is NOT a density-dependent control that influences the black crow population size?
Complete the following life table for a population of fruit flies:
Is this population growing? Explain.
Complete the following life table for a population of fruit flies:
Is this population growing? Explain.
Which of the following changes the genetic structure of a population due to immigration/emigration?
Consider an environment in which some year have good growing conditions and other years have very poor growing conditions. Would this environment favor r selected or K selected organisms? Explain.
The main differences between density-dependent and density-independent factors is
You are studying a population of ferrets with the following life table.
a) Fill in the missing data in the table.
b) The ferret population keeps increasing due to excess resources and lack of predators. To control this population there is a decision to prevent all ferrets from class 2-3 to mate or to sterilize all ferrets in class 3-4. Which of the above strategies will be more effective in slowing the population growth?
Factors that affect carrying capacity include all of the following except
Consider a closed population where density independent birth and death rates occur, which of the following could happen:
Which one of the following is a cost associated with living in a group?
You are studying a population of lizards and find that over the time period studied, 5 eggs hatch, 10 lizards leave the area, 3 lizards die of hypothermia and 4 lizards move into the area.
What is the population change over this period?
What is the equation you would use to calculate the above?
True or False.
The carrying capacity of an ecosystem is the same for all species that exist within.
In a density dependent population growth mode, a sudden increase in population size will cause the population growth rate to:
The population of squirrels in a forest has increased and there are no longer enough Maple trees to nest in.
This is an example of:
What are some differences between density dependent and density independent factors? How doe each limit population size?
Give some examples.
Consider the following scenario: Country A has 40% of its population under the age of 15 and 5% over the age of 65 while Country B has 25% of its population under the age of 15 and 25% over the age of 65. Which population will increase faster in the future. Explain.
Stage (x) Complete the following life table for a population of fruit flies:
Is this population growing? Explain.
Which of the following is NOT a density-dependent control that influences the black crow population size?
All of the following are density dependent factors that limit animal populations except
Consider a closed population where density independent birth and death rates occur, which of the following could happen:
In a density dependent population growth mode, a sudden increase in population size will cause the population growth rate to:
You are studying a population of lizards and find that over the time period studied, 5 eggs hatch, 10 lizards leave the area, 3 lizards die of hypothermia and 4 lizards move into the area. What is the population change over this period?
What is a necessary requirement for exponential growth to occur?
Ecology
Complete the following life table for a population of fruit flies:
Is this population growing? Explain.
All of the following are density dependent factors that limit animal populations except:
You collect data on birth and mortality in three populations of butterflies.
Are the following statements T or F?
b d
What are some differences between density dependent and density independent factors? How does each limit population size? Give some examples.
What factors place limits on the logistic model of growth?
Which of the following changes the genetic structure of a population due to immigration/emigration?
Compared to a population on a main continent, how will a population on an isolated island evolve?
What factors place limits on the logistic model of growth?
What is a necessary requirement for exponential growth to occur?
Why are logistic growth curves S shaped?
Refer to the following graph. What is happening at position C?
Carrying capacity refers to:
Factors that affect carrying capacity include all of the following except:
You collect data on birth and mortality in three populations of butterflies.
b d
Population A 0.90 0.80
The population of squirrels in a forest has increased and there are no longer enough Maple trees to nest in. This is an example of: