Biology - Student Reader & Workbook

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    Biology - Student Reader & Workbook Unit 5, Ecology - Chapter 2: Communities and Populations

    UNIT 5, ECOLOGY CHAPTER 2: COMMUNITIES AND POPULATIONS ........................... 4LESSON 2.1 COMMUNITY INTERACTIONS ................................................................. 5

    Lesson Objectives ....................................................................................................................... 5Lesson Vocabulary ..................................................................................................................... 5Lesson Introduction .................................................................................................................... 6What Is a Community? ............................................................................................................... 8

    Predation ................................................................................................................................. 8Predation and Populations ...................................................................................................... 8Keystone Species ...................................................................................................................... 9Adaptations to Predation ......................................................................................................... 9

    Competition .............................................................................................................................. 11Interspecific Competition and Extinction .............................................................................. 12Interspecific Competition and Specialization ........................................................................ 12

    Symbiotic Relationships ........................................................................................................... 13Mutualism .............................................................................................................................. 13Commensalism ....................................................................................................................... 14Parasitism .............................................................................................................................. 14

    Graphic Organizer: Symbiotic Relationships ........................................................................... 15Graphic Organizer: Review of Community Interactions .......................................................... 16Ecological Succession ............................................................................................................... 16

    Primary Succession ............................................................................................................... 16Secondary Succession ............................................................................................................ 17

    Lesson Summary ....................................................................................................................... 19Lesson Review Questions ......................................................................................................... 19

    Recall ..................................................................................................................................... 19Apply ...................................................................................................................................... 19Think Critically ...................................................................................................................... 19

    Points to Consider ..................................................................................................................... 20Multimedia Links ...................................................................................................................... 20

    LESSON 2.2 CHARACTERISTICS OF POPULATIONS ...................................................21Lesson Objectives ..................................................................................................................... 21Lesson Vocabulary ................................................................................................................... 21Lesson Introduction .................................................................................................................. 22Population Size, Density, and Distribution ............................................................................... 23

    Population Density ................................................................................................................ 24Population Distribution ......................................................................................................... 24Population Structure .............................................................................................................. 25Population Pyramids ............................................................................................................. 25

    Survivorship Curves ................................................................................................................. 26Population Growth .................................................................................................................... 29

    Population Growth Rate ........................................................................................................ 29

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    Dispersal and Migration ........................................................................................................ 29Patterns of Population Growth .............................................................................................. 31

    Exponential Growth .................................................................................................................. 31Logistic Growth ........................................................................................................................ 31Lesson Summary ....................................................................................................................... 34Lesson Review Questions ......................................................................................................... 34

    Recall ..................................................................................................................................... 34Apply ...................................................................................................................................... 34Think Critically ...................................................................................................................... 34

    Points to Consider ..................................................................................................................... 35Multimedia Links ...................................................................................................................... 35

    LESSON 2.3 HUMAN POPULATION GROWTH ...........................................................36Lesson Objectives ..................................................................................................................... 36Lesson Vocabulary ................................................................................................................... 36Early Population Growth .......................................................................................................... 37Demographic Transition ........................................................................................................... 37

    Death Rates Fall .................................................................................................................... 37Birth Rates Fall ...................................................................................................................... 38

    Stages of the Demographic Transition ...................................................................................... 38Graphic Organizer: Stages of Demographic Transition in Europe and N. America ................ 39Recent Population Growth ........................................................................................................ 40Future Population Growth ........................................................................................................ 42Lesson Summary ....................................................................................................................... 45Lesson Review Questions ......................................................................................................... 45

    Recall ..................................................................................................................................... 45Apply Concepts ...................................................................................................................... 45Think Critically ...................................................................................................................... 46

    Points to Consider ..................................................................................................................... 46Multimedia Links ...................................................................................................................... 46

    LESSON 2.4 THE BIODIVERSITY CRISIS ...................................................................47Lesson Objectives ..................................................................................................................... 47Lesson Vocabulary ..............................................