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Biology 5.1
Biology 5.1
Biology 5.1
Biology 5.1
Biology 5.1
Biology 5.1
Biology 5.1
Biology 5.1
Biology 5.1
Biology 5.1
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Biology 5.1

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Transcript

  • 1. How Populations Grow 5.1
  • 2. Population Density
    Number of individuals per unit of area.
  • 3. Immigration
    Movement of individuals into an area occupied by an existing population.
  • 4. Emigration
    Movement of individuals out of an area.
  • 5. Exponential Growth
    Growth pattern in which the individuals in a population reproduce at a constant rate.
  • 6. Logistic Growth
    Growth pattern in which a population’s growth rate slows or stops following a period of exponential growth.
  • 7. Carrying Capacity
    Largest number of individuals of a population that a given environment can support.
  • 8. Key Concept
    What characteristics are used to describe a population?
    Three important characteristics of a population are its geographic distribution, density, and growth rate.
  • 9. Key Concept
    What factors affect population size?
    Three factors can affect population size: the number of births, the number of deaths, and the number of individuals that enter or leave the population.
  • 10. Key Concept
    What are exponential growth and logistic growth?
    Under ideal conditions with unlimited resources, a population will grow exponentially and as resources become less available, the growth of a population slows or stops.

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