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Population Ecology

Population Ecology. Population. A group of individuals of a single species in a given area Density Dispersion. Clumped. Uniform. Random. Demography. The study of statistics that affect population size. Life Table. Survivorship Curve. Reproductive Table. Life Histories. Semelparity

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Population Ecology

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  1. Population Ecology

  2. Population • A group of individuals of a single species in a given area • Density • Dispersion

  3. Clumped

  4. Uniform

  5. Random

  6. Demography • The study of statistics that affect population size

  7. Life Table

  8. Survivorship Curve

  9. Reproductive Table

  10. Life Histories • Semelparity • Iteroparity

  11. Population Growth • Exponential Growth • dN/dt = rmaxN • dN = change in number • dt = change in time • rmax = intrinsic growth rate • N = number of ind.

  12. Population Growth • Logistic Growth • dN/dt = rmaxN (K-N) K • dN = change in number • dt = change in time • rmax = intrinsic growth rate • N = number of ind. • K = Carrying Capacity

  13. Logistic Growth

  14. r selected Large number of offspring No parental care Small in size Short lifespan K selected Small number of offspring Large amounts of parental care Large in size Longer lifespan Life Histories

  15. Population Limiting Factors • Density Independent • Natural disasters • Density Dependent • Disease

  16. Human Population and ZPG • Which type of growth do humans follow? • What is ZPG?

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