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What factors place limits on the logistic model of growth?

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Wize University Biology Textbook > Ecology

Species Interactions

4 Activities

Wize University Biology Textbook > Ecology

Community Ecology

5 Activities

Wize University Biology Textbook > Ecology

Population Growth

6 Activities

What factors place limits on the logistic model of growth?
More Species Interactions Questions:
Which of the following is NOT a density-dependent control that influences the black crow population size?
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?
Lichen attaches to trees and slowly breaks them down in order to obtain nutrients to increase their fitness. This is an example of what type of relationship?
a) Predatory
b) Mutualism
The symbiosis in which one species benefits and the other is always harmed is known as:
Which of the following terms describes a group of organisms of a single species that live in the same space, same time and reproduce with one another?
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?
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?
A mosquito taking blood from a human is an example of what type of relationship?
Sea anemones contain venom to paralyze their prey, but clownfish are resistant to this venom and so use the anemone as their niche.
This is an example of what type of relationship?
What prevents predator population from completely eliminating prey populations?
Lichen attaches to trees and slowly breaks them down in order to obtain nutrients to increase their fitness.
This is an example of what type of relationship?
Which of the following is NOT a density-dependent control that influences the black crow population size?
You are studying a population of ferrets with the following life table.
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, option 1 or option 2?
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?
What prevents predator population from completely eliminating prey populations?
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?
Ecology Practice Problem 1
Lichen attaches to trees and slowly breaks them down in order to obtain nutrients to increase their fitness. This is an example of what type of relationship?
a) Predatory
b) Mutualism
It was found that guppies (live-bearing fish), when raised in predator free waters, produce larger sized offspring that mature slowly.
This is in comparison to guppies raised in the presence of predators whereby the progeny are smaller, mature quicker and reproduce earlier.
What phenomena is occurring?
The species interaction in which one species benefits and the other is always harmed is known as which of the following? Choose all that apply.
What is a symbiotic relationship?
Sea anemones contain venom to paralyze their prey, but clownfish are resistant to this venom and so use the anemone as their niche. This is an example of what type of relationship?
Consider a species of forest flower that varies in colour from white to pink to bright red. Aphids prefer to eat the coloured flowers over the white ones, and pollinators prefer this colour as well (therefore have better reproductive success). The percentage of different flower colours remains stable from year to year, however if all aphids are removed what would you expect to happen in the distribution of flower colours?
Practice: Frog Evolution Scenario
Consider the following scenario. Answer all questions using key terminologies and justifications.
A tropical rainforest supports a species of poison dart frog which feeds primarily on a local tree beetle. Providing the weather is constant, and food is plentiful, this species continues to breed and populate the ecosystem. Further, the ratio of males and females is equal so no competitive mating is occurring and the entire species is phenotypically identical.
a) Providing the above situation is maintained, will these species evolve in the next 1000 years? Justify your answer.
Which of the following statements is correct?
As the population of black crows increases in January, which of the following is true?
A mosquito taking blood from a human is an example of what type of relationship?
Sea anemones contain venom to paralyze their prey, but clownfish are resistant to this venom and so use the anemone as their niche. This is an example of what type of relationship?
More Community Ecology Questions:
It was found that guppies (live-bearing fish), when raised in predator free waters, produce larger sized offspring that mature slowly. This is in comparison to guppies raised in the presence of predators whereby the progeny are smaller, mature quicker and reproduce earlier. What phenomena is occurring?
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?
Two closely related species of woodpeckers live in Canada. The black variety lives in coniferous forests while the yellow variety in deciduous forests. In the United States however, the black woodpecker is not a native species while the yellow variety is and lives in the deciduous and coniferous forests. What does this say about the habitat of this organism?
Which of the following terms describes a group of organisms of a single species that live in the same space, same time and reproduce with one another?
The total range of environmental condition where a species lives and reproduces is commonly referred to as its:
Two closely related species of woodpeckers live in Canada. The black variety lives in coniferous forests while the yellow variety in deciduous forests. In the United States however, the black woodpecker is not a native species while the yellow variety is and lives in the deciduous and coniferous forests.
What does this say about the habitat of this organism?
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:
State whether the following isolating mechanisms are pre- or post-zygotic mechanisms.
a) Land snakes cannot fertilize water snake eggs
b) Ligers (tiger and lion hybrid) are sterile
Why is fitness relative?
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?
Two closely related species of woodpeckers live in Canada. The black variety lives in coniferous forests while the yellow variety in deciduous forests. In the United States however, the black woodpecker is not a native species while the yellow variety is and lives in the deciduous and coniferous forests. What does this say about the habitat of this organism?
Ecology Practice Problem 4
It was found that guppies (live-bearing fish), when raised in predator free waters, produce larger sized offspring that mature slowly. This is in comparison to guppies raised in the presence of predators whereby the progeny are smaller, mature quicker and reproduce earlier. What phenomena is occurring?
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?
Ecology Practice Problem 2
Two closely related species of woodpeckers live in Canada. The black variety lives in coniferous forests while the yellow variety in deciduous forests. In the United States however, the black woodpecker is not a native species while the yellow variety is and lives in the deciduous and coniferous forests. What does this say about the habitat of this organism?
Which of the following is an example of intersexual selection?
Which of the following scenarios represents intrasexual competition?
What metabolic pathways generate ATP to be used during cruising activity versus burst activity?
The total range of environmental condition where a species lives and reproduces is commonly referred to as its:
Levels of Diversity
What is the difference between the following levels of organization?
Community and Ecosystem
Which of the following is not correct:
Which organism could be found in an area soon after primary ecological succession?
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:
The total range of environmental condition where a species lives and reproduces is commonly referred to as its:
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
The carrying capacity of an ecosystem is the same for all species that exist within it
What are some differences between density dependent and density independent factors? How does each limit population size? Give some examples.
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: