Ch. 56 BIO Final

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Author:
ajhugee
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122085
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Ch. 56 BIO Final
Updated:
2011-12-08 23:40:55
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56 BIO Final
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Final
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  1. The number of individuals per unit area or volume (extremely hard to determine)
    Density
  2. The pattern of spacing among individuals within the boundaries of the population
    Dispersion
  3. Individuals aggregate in patches- influenced by resources availability and behavior (most common)
    Clumped dispersion
  4. Individuals are evenly spaced- influenced by social interactions such as territoriality
    Uniform dispersion
  5. The position of each individual is independent of other individuals (least common)
    Random dispersion
  6. The study of birth rates, death rates, age distributions, and the sizes of populations (how births and deaths change population sizes over time)
    Demography
  7. An age-specific summary of the survival pattern of a population- best constructed by following the fate of a cohort from birth until they are dead
    Life tables
  8. A group of individuals of the same age
    Cohort
  9. A graphical plot of the numbers of surviving individuals at each age in a population
    Survivorship curve
  10. What is the maximum population size that a particular environment can support?
    Carrying capacity (K)
  11. How does carrying capacity affect population growth?
    When N=K, the population stops growing
  12. What is the population increase under legalized conditions- results in a J-shaped curve- cannot be sustained
    Exponential growth
  13. What includes the carrying capacity- results in an S-shaped curve- fits few real populations but it is useful for estimating population growth
    Logistic growth
  14. What calculates the total productive land needed for each person to survive in a sustainable world?
    Ecological footprint concept
  15. The average ecological footprint for everyone on planet Earth is currently 3 what?
    hectares
  16. The current ecological footprint for a person in the US is 10 what?
    hectares
  17. How do density-dependent factors regulate population growth?
    • Morality factor whose influence increases with the density of the population
    • ex. predation, parasitism, disease, and competition
  18. What are density independent factors?
    • Morality factors whose influence is not affected by population size or density
    • ex. weather, drought, floods, fires
  19. What do age-structure pyramids show us about current and future population growth?
    The show us where the most people are at different ages (relative number of individuals of each defined age group)

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