Exercise 11 Flashcards
How does geometric population growth differ from exponential population growth?
Geometric growth occurs when individuals reproduce over discrete time periods while exponential growth occurs when individuals reproduce continuously.
Geometric growth occurs when individuals reproduce continuously while exponential growth occurs when individuals reproduce over discrete time periods.
Both types of population growth are very similar, but geometric growth shows a constant proportional change while exponential growth does not.
Both types of population growth are very similar, but geometric growth shows an additive growth pattern and exponential growth shows a multiplicative growth pattern.
Geometric growth occurs when individuals reproduce over discrete time periods while exponential growth occurs when individuals reproduce continuously.
What is λ in the geometric growth rate equation?
λ is a constant whose value is determined by the per capita birth rate minus the per capita death rate over continuous time.
λ is a constant whose value is determined by the per capita birth rate minus the per capita death rate over discrete time periods.
λ is a constant whose value is determined by the total number of births minus the total number of deaths over discrete time periods.
λ is a constant whose value is determined by the total number of individuals at time t minus the total number of individuals at time t + 1.
λ is a constant whose value is determined by the per capita birth rate minus the per capita death rate over discrete time periods.
What is r in the exponential growth rate equation?
r is a constant whose value is determined by the per capita birth rate minus the per capita death rate over discrete time periods.
r is a constant whose value is determined by the per capita birth rate plus the per capita death rate over continuous time.
r is a constant whose value is determined by the per capita birth rate minus the per capita death rate over continuous time.
r is a constant whose value is determined by the total number of individuals at time t minus the total number of individuals at time t + 1.
r is a constant whose value is determined by the per capita birth rate minus the per capita death rate over continuous time.
You plot the relationship between population growth and population density and find no relationship between the two variables. What does this relationship indicate about the population?
The population is not growing and has reached its carrying capacity.
The population growth rate is dependent on the number of individuals in the population.
The population growth rate is independent of the number of individuals in the population.
Density-dependent factors are critical to this population.
The population growth rate is independent of the number of individuals in the population.
Which of the following are examples of density-independent factors?
Hurricanes, heat waves, and competition with other individuals in the population
Weather, climate, food, and habitat
Logging, storms, hunting, and provision of territories
Forest fires, hunting, and trampling by elephants
Forest fires, hunting, and trampling by elephants
How do density-dependent factors regulate population size?
Density-dependent factors can have large effects on population size, but they do not regulate population size.
Density-dependent factors can have large effects on population size but small effects on λ or r, thus regulating population size.
Density-dependent factors increase λ or r when the population size is large and decrease λ or r when the population size is small.
Density-dependent factors increase λ or r when the population size is small and decrease λ or r when the population size is large.
Density-dependent factors increase λ or r when the population size is small and decrease λ or r when the population size is large.
How does logistic growth compare to exponential growth?
Logistic growth is similar to, but slightly slower than, exponential growth when densities are low. When densities are high, logistic growth speeds up as it approaches the carrying capacity.
Logistic growth is similar to, but slightly slower than, exponential growth when densities are low. When densities are high, logistic growth slows down as it approaches the carrying capacity.
Logistic growth is similar to, but slightly faster than, exponential growth when densities are low. When densities are high, logistic growth slows down as it approaches the carrying capacity.
Logistic growth is similar to, but slightly slower than, exponential growth when densities are low. When densities are high, logistic growth and exponential growth both grow quickly in a multiplicative manner.
Logistic growth is similar to, but slightly slower than, exponential growth when densities are low. When densities are high, logistic growth slows down as it approaches the carrying capacity.
With logistic growth, when the term (1 — N/K) is close to 1, what happens to population growth?
Population growth speeds up because it is reaching the carrying capacity (N = K).
Population growth is similar to that of exponential growth (dN/dt = rN).
Population growth slows down because it is reaching its carrying capacity (N = K).
Population growth slows down because r is approaching zero (r = 0).
Population growth is similar to that of exponential growth (dN/dt = rN).
Which best describes the pattern of U.S. population size over time?
U.S. population size followed a logistic growth curve until the 1950s but then continued to increase past its projected carrying capacity.
U.S. population size followed a logistic growth curve until the 1950s but then declined precipitously as birth rates went down.
U.S. population size followed an exponential growth curve until the 1950s and then followed a logistic growth curve.
U.S. population size followed a logistic growth curve and reached its carrying capacity in the late 1960s.
U.S. population size followed a logistic growth curve until the 1950s but then continued to increase past its projected carrying capacity.
What is the advantage of using life table data to determine population growth rate?
Life table analysis reduces the variability in reproduction and survival across age, size, or life stage classes.
Life table analysis incorporates how reproduction and dispersal vary with the age, size, or life stage of individuals within a population.
Life table analysis incorporates how reproduction and survival vary with the age, size, or life stage of individuals within a population.
Life table analysis requires decades of data collection.
Life table analysis incorporates how reproduction and survival vary with the age, size, or life stage of individuals within a population.
Population A shows an age structure in which there are roughly equal numbers of individuals in each age class. Population B shows an age structure in which there are more individuals in the earlier age classes. What type of population growth is occurring in these populations?
Population A: positive growth; Population B: negative growth
Population A: zero or positive growth; Population B: zero or negative growth
Population A: negative growth; Population B: positive growth
Population A: zero or negative growth; Population B: positive growth
Population A: zero or negative growth; Population B: positive growth
If R0 = 2 and G = 1, what is r and λ?
r = 2; λ = 0.69
r = 0.69; λ = 2
r = 0.30; λ = 1
r = 0.69; λ = 0
r = 0.69; λ = 2
A population of turtles contained 342 individuals at the end of the year 2013. Since then, 44 have died, 37 were born, 17 immigrated, and 6 emigrated. What is the population size now?
346
A population of Drosophila mauritiana reproduces in synchrony at discrete time periods every generation, and generations occur at two-week intervals. The current population size is 1,000, and its geometric population growth rate is 3.0 per generation. What will the expected size of the population be after six weeks?
3,000
9,000
27,000
81,000
27,000
Which population would be expected to remain stable in size?
A population with an r of < 1
A population with a λ of 1 or an r of 0
A population with an r of > 0
A population with a λ of 0 and an r of 1
A population with a λ of 1 or an r of 0
