UCCS Biology 1200 Chapter 53

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UCCS Biology 1200 Chapter 53
2013-09-24 15:16:46
UCCS Biology 1200

Bio 1200 lecture notes
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  1. What are abiotic factors of dispersion?
    environmental factors like temperature
  2. What are biotic factors of dispersion?
    • Competition
    • parasites
    • etc.
  3. What are the patterns of distribution in reference to dispersion?
    • Clumped
    • Uniform
    • Random
  4. Abundance is affected by:
    • Natality and Morality
    • Immigration and Emigration
  5. Density is affected by:
    • Body size
    • Availability of resources
    • Behavior
    • Fecundity and Morality
  6. Define Demographics
    Demographics are the quantifiable statistics of a given population
  7. Define Surviorship
    The number of individuals in a population that survive per unit of time
  8. What is Type I Survivorship?
    Higher survivorship of young and middle aged individuals
  9. What is Type II Survivorship?
    Equal survivorship among all age groups
  10. What is Type III Survivorship?
    Higher Survivorship of middle and older aged individuals
  11. What is the net reproductive rate (R0)?
    The average number of offspring produced by an individual
  12. What is generation time (T)?
    Average time from egg to egg
  13. What is the geometric rate of increase ([])?
    The ratio of population size two points in time
  14. What is the per capita rate of increase (r)?
    Birth Rate - The Death Rate

    • -if negative, population is declining
    • -if 0, population is stable
    • -if positive, population is growing
  15. What are the two types of growth of a population?
    • Exponential growth
    • Logistic growth
  16. Exponential growth represents:
    The growth of a population under ideal conditions
  17. A J-Shaped curve on a population graph indicates what kind of population growth?
  18. Logistic growth represents:
    Population growth when resources are limited
  19. An S-Shape curve on a population graph indicates which kind of growth?
  20. How does Logistic growth happen?
    Population growth starts fast but then levels off and approaches zero at K
  21. What is a Maximum sustainable yield (MSY)?
    The largest catch/yield that can be taken from a stock while remaining a stable population size
  22. Define Age Structure:
    Number of individuals of each age in the population
  23. What is the doubling time for human beings?
    53 years
  24. When did the human population peak and at what % ?
    1962 at 2.2%
  25. What is the current growth rate of humans?
  26. What is the growth rate predicted to be in 2050?
  27. Which kind of countries account for the highest rates of growth?
    Less developed countries
  28. Which countries account for greater rates of resource consumption and waste production?
    More developed countries
  29. Define life history:
    reproductive characteristics of a population
  30. What are the aspects of life history?
    • Age of reproductive maturity
    • Frequency of reproduction
    • Number of offspring
  31. Life history strategies involve trade offs because resources are limited. What are some examples?
    • Egg/seed size and number
    • Frequency of reproduction (semelparity or iteroparity)
  32. Semelparity and iteroparity refer to:
    the reproductive strategy of an organism
  33. Define semelparity:
    The act of reproducing or the condition or process of being reproduced
  34. Define iteroparity:
    producing offspring more than once during itslifetime