Biology Unit 11

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Author:
sccf5
ID:
1471
Filename:
Biology Unit 11
Updated:
2009-11-23 11:55:03
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bio
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Description:
population biology
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  1. age class
    a group of indivudals of similar age within a population
  2. age structure
    numbers or pereentages of individuals in each age class of a population
  3. biotic potential
    the maximum rate of increase of a population under ideal conditions; an exponential growth curve that includes death rates
  4. carrying capacity
    the macimum number of indiuvdals of a population that a given area or habitat can support
  5. exponential growth
    growth which increases as a function of the size of the population (i.e. the larger the population, the greater the increase)
  6. fecundity
    reporductive output of an indivdual
  7. life table
    a complete list of the survivorship and fecundity of a population by age class
  8. limiting factor
    a specific environmental factor which prevents a population from achieving its biotic potential
  9. logistic growth
    growth that follows a sigmoid (S-shaped) curve in which growth is slow initially, then rapid until the carrying capacity is approached, and finally slow again as the population reaches its carrying capacity
  10. mortality
    death rate in a population, typically expressed as the percentage of indivduals in a population that die in a given time interval
  11. net reproductive rate
    expected number of offspring of a female during her lifetime
  12. population
    a group of individuals of the same speices in the same place at the same time
  13. post-reproductives
    the age class which includes indiviudals that are no longer reproducing
  14. pre-reproductives
    the age class which includes indivudals that have not yet achieved sexual maturity
  15. reproductives
    the age class which incldues sexually-mature indivudlas that are reproducing
  16. survivorship curve
    a graph of the number of surviving indivudals in a population as a function of age

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