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Chapter 5

Chapter 5. Populations. Factors Affecting Population Growth. Birthrate (+) Death rate (-) Immigration (+) Emigration (-). Exponential Growth. The size of each generation of offspring will be larger than the one before it The larger the population gets, the faster it grows.

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Chapter 5

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  1. Chapter 5 Populations

  2. Factors Affecting Population Growth • Birthrate (+) • Death rate (-) • Immigration (+) • Emigration (-)

  3. Exponential Growth • The size of each generation of offspring will be larger than the one before it • The larger the population gets, the faster it grows

  4. Logistic Growth • Is when a population’s growth slows and then stops, after a period of exponential growth • Growth stops when birthrate = death rate and immigration = emigration

  5. Carrying Capacity • Is the maximum number of individuals of a particular species that a particular environment can support

  6. Limits • A limiting factor controls the growth of a population • Examples – competition, predation, parasitism, disease, unusual weather, natural disaster • These determine carrying capacity

  7. Human Population • Slow growth early • Civilization advancements increased growth • Bubonic plague caused a decrease • Industrial Revolution led to exponential growth

  8. Current world population over 7 billion • US Census taken 2010

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