Question 1

What is true about the life table data and resulting survivorship curve for Dall sheep as published by O. Murie in 1944?

Accepted Answer

A)  The survivorship curve showed a definitive type II curve. 
B)  Age class 0-1 had higher survivorship then any of the next three ages classes. 
C)  When the population size for a particular age class was small, survivorship rates were unreliable. 
D)  The real-world survivorship curve based on the collection of 608 Dall sheep skeletons did not differ from the expected, generalized curve for similar species. 
A)  The survivorship curve showed a definitive type II curve. 
B)  Age class 0-1 had higher survivorship then any of the next three ages classes. 
C)  When the population size for a particular age class was small, survivorship rates were unreliable. 
D)  The real-world survivorship curve based on the collection of 608 Dall sheep skeletons did not differ from the expected, generalized curve for similar species.

Question 2

The figure shows the change in population size of Paramecium from Gause's experiment, raised in either high-food or low-food conditions. Based on this figure, how was the logistic growth model for Paramecium changed by adding food?

Accepted Answer

A)  High food increased r. 
B)  High food decreased r. 
C)  High food increased K. 
D)  High food decreased K. 
A)  High food increased r. 
B)  High food decreased r. 
C)  High food increased K. 
D)  High food decreased K.

Question 3

Applying life tables to sea turtle conservation demonstrated that the most effective way to increase sea turtle populations is to

Accepted Answer

A)  raise large numbers of hatchlings and release them into the ocean. 
B)  protect nests from human poaching and other predators. 
C)  protect adults from being captured in fishing nets. 
D)  harvest small numbers of adults for human consumption each year. 
A)  raise large numbers of hatchlings and release them into the ocean. 
B)  protect nests from human poaching and other predators. 
C)  protect adults from being captured in fishing nets. 
D)  harvest small numbers of adults for human consumption each year.

Question 4

Define population doubling time. Starting with the model for exponential population growth, explain how to derive the formula for population doubling time.

Accepted Answer

Population doubling time is the time it

Question 5

The Allee effect describes

Accepted Answer

A)  density-independent population regulation. 
B)  negative density-dependent population regulation. 
C)  positive density-dependent population regulation. 
D)  logistic population growth. 
A)  density-independent population regulation. 
B)  negative density-dependent population regulation. 
C)  positive density-dependent population regulation. 
D)  logistic population growth.

Question 6

That individuals are more likely to find mates and reproduce when populations are larger as compared to when populations are smaller might be termed

Accepted Answer

A)  the Allee effect. 
B)  negative density dependence. 
C)  a density-independent variable. 
D)  self-thinning 
A)  the Allee effect. 
B)  negative density dependence. 
C)  a density-independent variable. 
D)  self-thinning

Question 7

Which plot is consistent with a geometric growth model in which $\lambda$= 1?

Accepted Answer

A)  a 
B)  b 
C)  c 
D)  d 
A)  a 
B)  b 
C)  c 
D)  d

Question 8

Which is the most accurate statement about the conservation biology of species with positive density-dependent population regulation?

Accepted Answer

A)  If the population is small, it may not be able to increase. 
B)  The population will quickly exhaust all resources. 
C)  Species with positive density dependence are not at risk for extinction. 
D)  Population growth rate is highest when N > K. 
A)  If the population is small, it may not be able to increase. 
B)  The population will quickly exhaust all resources. 
C)  Species with positive density dependence are not at risk for extinction. 
D)  Population growth rate is highest when N > K.

Question 9

In a population growing according to the exponential growth model, population size is

Accepted Answer

A)  limited by density-dependent factors. 
B)  limited by density-independent factors. 
C)  limited by both density-dependent and density-independent factors. 
D)  not limited. 
A)  limited by density-dependent factors. 
B)  limited by density-independent factors. 
C)  limited by both density-dependent and density-independent factors. 
D)  not limited.

Question 10

In the exponential growth model, which term indicates the intrinsic rate of increase?

Accepted Answer

A)  N0 
B)  e 
C)  r 
D)  t 
A)  N0 
B)  e 
C)  r 
D)  t

Question 11

Using the logistic growth model, draw a line that shows the relationship between per capita growth rate (y axis) and population size (x axis) for a hypothetical population with a carrying capacity of 500 individuals. Explain how the slope relates to changes in population size over time and give an example of an environmental factor that could cause a population to follow a logistic model of population growth.

Accepted Answer

The logistic growth model is represented

Question 12

All cohort life tables

Accepted Answer

A)  follow individuals born at the same time from birth to death. 
B)  quantify the survival and fecundity of all individuals at a single time interval. 
C)  have a stable age distribution. 
D)  describe a population at its carrying capacity. 
A)  follow individuals born at the same time from birth to death. 
B)  quantify the survival and fecundity of all individuals at a single time interval. 
C)  have a stable age distribution. 
D)  describe a population at its carrying capacity.

Question 13

Describe the similarities and differences between a cohort life table and a static life table. Give an actual example of each.

Accepted Answer

A cohort life table and a static life ta

Question 14

A park biologist is planting saplings (young trees) in an old field that has recently been turned into a park. Draw a hypothetical self-thinning curve for these trees over 5 years. Be sure to label the axes. Describe a practical use of this curve.

Accepted Answer

The hypothetical self-thinning curve for

Question 15

Which factors could limit a species' carrying capacity?
I. the amount of food available
II. the number of eggs a female can produce
III. the number of nesting sites present

Accepted Answer

A)  I only 
B)  II only 
C)  III only 
D)  I and II 
E)  I and III 
A)  I only 
B)  II only 
C)  III only 
D)  I and II 
E)  I and III

Question 16

When looking at plants, what would be considered a plant's generation time?

Accepted Answer

A)  Plants do not have generation times; only animals have generation times. 
B)  the time it takes for a seed to grow into a mature plant and produce seeds of its own 
C)  the time it takes for a seed to germinate 
D)  the time it takes for a seed to flower 
A)  Plants do not have generation times; only animals have generation times. 
B)  the time it takes for a seed to grow into a mature plant and produce seeds of its own 
C)  the time it takes for a seed to germinate 
D)  the time it takes for a seed to flower

Question 17

The intrinsic growth rate, r, is the

Accepted Answer

A)  number of new individuals produced minus the number that die. 
B)  highest possible per capita increase in population size under ideal conditions. 
C)  time it takes for a population to double in size. 
D)  maximum population size that can be supported by the environment. 
A)  number of new individuals produced minus the number that die. 
B)  highest possible per capita increase in population size under ideal conditions. 
C)  time it takes for a population to double in size. 
D)  maximum population size that can be supported by the environment.

Question 18

Which reflects positive density-dependent population regulation?
I. Small populations of flowers produce fewer seeds per individual than large populations of flowers.
II. Large groups of birds are better able to detect and avoid predators than small groups of birds.
III. The probability that a forest predator will kill a squirrel does not depend on the size of the squirrel population.

Accepted Answer

A)  I only 
B)  II only 
C)  III only 
D)  I and II 
E)  I and III 
A)  I only 
B)  II only 
C)  III only 
D)  I and II 
E)  I and III

Question 19

When working with life tables, we work with many variables and make many calculations. One such variable of importance is bx or fecundity. An important calculation we make as we determine the net reproductive rate is lxbx. This calculation is often referred to as "realized fecundity." Why might that be the case?

Accepted Answer

A)  because we are looking at fecundity rate for females as well as considering how many females survive (survivorship rate) to each reproductive age class 
B)  because we are looking at both male and female survivorship at each age class 
C)  because we are looking at survivorship only at prereproductive age classes 
D)  because we are looking at survivorship only at postreproductive age classes 
A)  because we are looking at fecundity rate for females as well as considering how many females survive (survivorship rate) to each reproductive age class 
B)  because we are looking at both male and female survivorship at each age class 
C)  because we are looking at survivorship only at prereproductive age classes 
D)  because we are looking at survivorship only at postreproductive age classes

Question 20

Describe how the geometric growth model is different from the exponential growth model. For each growth model, give an example of an organism that fits the growth pattern it describes. Explain why the organism fits the model.

Accepted Answer

The geometric growth model and the expon

What is true about the life table data and resulting survivorship curve for Dall sheep as published by O. Murie in 1944?

The figure shows the change in population size of Paramecium from Gause's experiment, raised in either high-food or low-food conditions. Based on this figure, how was the logistic growth model for Paramecium changed by adding food?

Applying life tables to sea turtle conservation demonstrated that the most effective way to increase sea turtle populations is to

Define population doubling time. Starting with the model for exponential population growth, explain how to derive the formula for population doubling time.

The Allee effect describes

That individuals are more likely to find mates and reproduce when populations are larger as compared to when populations are smaller might be termed

$Which plot is consistent with a geometric growth model in which \lambda = 1?$ Which plot is consistent with a geometric growth model in which $\lambda$ = 1?

Which is the most accurate statement about the conservation biology of species with positive density-dependent population regulation?

In a population growing according to the exponential growth model, population size is

In the exponential growth model, which term indicates the intrinsic rate of increase?

All cohort life tables

Describe the similarities and differences between a cohort life table and a static life table. Give an actual example of each.

A park biologist is planting saplings (young trees) in an old field that has recently been turned into a park. Draw a hypothetical self-thinning curve for these trees over 5 years. Be sure to label the axes. Describe a practical use of this curve.

Which factors could limit a species' carrying capacity? I. the amount of food available II. the number of eggs a female can produce III. the number of nesting sites present

When looking at plants, what would be considered a plant's generation time?

The intrinsic growth rate, r, is the

Describe how the geometric growth model is different from the exponential growth model. For each growth model, give an example of an organism that fits the growth pattern it describes. Explain why the organism fits the model.

Introduction: Ecology, Evolution, and the Scientific Method

Adaptations to Aquatic Environments

Adaptations to Terrestrial Environments

Adaptations to Variable Environments

Climates and Soils

Terrestrial and Aquatic Biomes

Evolution and Adaptation

Life Histories

Reproductive Strategies

Social Behaviors

Population Distributions

Population Dynamics Over Space and Time

Predation and Herbivory

Parasitism and Infectious Diseases

Competition

Mutualism

Community Structure

Community Succession

Movement of Energy in Ecosystems

Movement of Elements in Ecosystems

Landscape Ecology and Global Biodiversity

Global Conservation of Biodiversity

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Exam 12: Population Growth and Regulation

What is true about the life table data and resulting survivorship curve for Dall sheep as published by O. Murie in 1944?

The figure shows the change in population size of Paramecium from Gause's experiment, raised in either high-food or low-food conditions. Based on this figure, how was the logistic growth model for Paramecium changed by adding food?

Applying life tables to sea turtle conservation demonstrated that the most effective way to increase sea turtle populations is to

Define population doubling time. Starting with the model for exponential population growth, explain how to derive the formula for population doubling time.

The Allee effect describes

That individuals are more likely to find mates and reproduce when populations are larger as compared to when populations are smaller might be termed

Which plot is consistent with a geometric growth model in which λ\lambdaλ = 1?

Which is the most accurate statement about the conservation biology of species with positive density-dependent population regulation?

In a population growing according to the exponential growth model, population size is

In the exponential growth model, which term indicates the intrinsic rate of increase?

All cohort life tables

Describe the similarities and differences between a cohort life table and a static life table. Give an actual example of each.

A park biologist is planting saplings (young trees) in an old field that has recently been turned into a park. Draw a hypothetical self-thinning curve for these trees over 5 years. Be sure to label the axes. Describe a practical use of this curve.

Which factors could limit a species' carrying capacity? I. the amount of food available II. the number of eggs a female can produce III. the number of nesting sites present

When looking at plants, what would be considered a plant's generation time?

The intrinsic growth rate, r, is the

Describe how the geometric growth model is different from the exponential growth model. For each growth model, give an example of an organism that fits the growth pattern it describes. Explain why the organism fits the model.

Introduction: Ecology, Evolution, and the Scientific Method

Adaptations to Aquatic Environments

Adaptations to Terrestrial Environments

Adaptations to Variable Environments

Climates and Soils

Terrestrial and Aquatic Biomes

Evolution and Adaptation

Life Histories

Reproductive Strategies

Social Behaviors

Population Distributions

Population Dynamics Over Space and Time

Predation and Herbivory

Parasitism and Infectious Diseases

Competition

Mutualism

Community Structure

Community Succession

Movement of Energy in Ecosystems

Movement of Elements in Ecosystems

Landscape Ecology and Global Biodiversity

Global Conservation of Biodiversity

Filters

$Which plot is consistent with a geometric growth model in which \lambda = 1?$ Which plot is consistent with a geometric growth model in which $\lambda$ = 1?