Chapter_52_SG_revised(2009030423414499) - CHAPTER 52...

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Unformatted text preview: CHAPTER 52 Population Ecology KEY TERMS ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ Population density Dispersion patterns Clumped pattern Uniform pattern Random pattern Age structure diagram Survivorship curve Life history ∗ ∗ ∗ ∗ ∗ ∗ Zero population growth Exponential population growth Carrying capacity Logistic population growth K-selected populations R-selected populations ∗ ∗ ∗ ∗ Limiting factors Density-dependent limiting factor Density-independent limiting factor Human population growth QUESTIONS 1. Draw a diagram illustrating the 3 types of dispersion patterns. Give an example of each type of dispersion pattern. 2. Draw and label a graph that shows the 3 types of survivorship curves. 3. Describe the characteristics of populations which exhibit Type I, Type II, and Type III survivorship curves, and give an example of each type of organism. 4. Draw and label the three different types of age-structure diagrams: 1) for a developed country with slow or zero population growth (Sweden), 2) a developed country with moderate population growth (U.S.), and 3) a country with a rapidly growing population (Mexico). Explain how you can determine what type of population growth is occurring by looking at an age-structure diagram. 5. Explain how population growth is determined. Specifically, what factors (or numbers) are required to determine population growth? 6. Compare and contrast r-selected and K-selected populations. 7. Draw and label a graph showing exponential population growth, under the conditions of unlimited resources. 8. Draw and label a graph showing logistic population growth. Explain why this type of growth plateaus or levels off after a period of time, as the carrying capacity is reached. 9. Explain how density-dependent and density-independent factors limit population growth. 10. Explain why some species have cyclic increases and decreases in population growth. Why would predators and their prey have cyclic population fluctuations that are directly related to each other? ...
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This note was uploaded on 09/29/2011 for the course BIO 020.152 taught by Professor Pearlman during the Fall '08 term at Johns Hopkins.

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