Chapter 3 and 4 study guide for biology



NAME ________________________________________________ DATE ____________________

Chapter 4: Population Ecology Study Guide

Match each term with the correct definition.

1. _____ Population density

2. _____ Dispersion

3. _____ Density-independent factor

4. _____ Density-dependent factor

5. _____ Population growth rate

6. _____ Emigration

7. _____ Limiting Factor

8. _____ Immigration

9. _____ Mortality

10. _____ R-strategist

11. _____ K-strategist

12. _____ Demography

13. _____ Natality

14. _____ Zero population growth

15. _____ Carrying capacity

Identify and draw each form of spatial distribution. Then list an example of an organism that would be distributed that way.

|Spatial Distribution |Picture |Example |

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16. What is something that could affect the dispersion of a population?

17. Density-dependent factors are often [ biotic / abiotic ]

18. Density-independent factors are often [ biotic / abiotic ]

19. List some examples of each type of factor.

Dependent:

Independent:

20. Identify the following as density-dependent or density-independent.

|Situation |Density-dependent |Density-independent |

|Northern Pike feed on other fish, the yellow perch. An increase in the | | |

|yellow perch population causes an increase in the northern pike population.| | |

|The BP oil spill in the Gulf of Mexico has harmed many aquatic organisms | | |

|that live in the Gulf region. | | |

|A new strain of influenza (the flue) breaks out in New York City. | | |

|Hurricane Katrina forced thousands of people to leave New Orleans. | | |

21. Identify the concept shown in the picture.

What concept is this? ______________________________

What can limit this? ______________________________________________________________________________________________________

___________________________________________________

______________________________________________________________________________________________________

22. Summarize the two types of reproductive strategies and provide an example of each.

|Strategy |Definition |Example |

|r-strategist | | |

|k-strategist | | |

23. Identify each graph as exponential or logistic, and then explain what each graph shows.

|[pic] | | |

|[pic] | | |

24. Circle all of the advancements that have allowed the human population to grow exponentially. Then, underline all of the things that could LIMIT the human population.

medicine artificial insemination voluntary population control

war technology poor shelter agriculture disease domesticated animals famine weather lack of space pollution

25. Why would overcrowding be a limiting factor for humans? (think back to last chapter and the use of resources by various organisms!)

26. Identify two ways in which a population can grow.

27. Identify two ways in which a population could decrease.

28. Use a mathematical equation to represent ZPG.

29. What is the future of population growth in the world?

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a. The number of individuals moving out of a population

b. A limiting factor that depends on the number of organisms in a population per unit area

c. Produce few offspring

d. Pattern of spacing of a population within an area

e. Death rate

f. The maximum number of individuals in a species that an environment can support for the long term

g. Birth rate

h. Generally small organisms that produce many offspring

i. A limiting factor that does NOT depend on the number of organisms in a population per unit area

j. How fast a given population grows

k. The number of individuals moving into a population

l. Number of organisms per unit area

m. A factor that prevents a population from growing

n. The study of human population size, density, distribution, and birth/death rates

o. Births + immigration = deaths + emigration

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