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13 Cards in this Set

  • Front
  • Back
population density
the number of individuals per unit area
the movement of individuals into an area
the movement of individuals out of an area
exponential growth
occurs when the individuals in a population reproduce at a constant rate
logistic growth
occurs when a populations growth slows or stops following a period of exponential growth
carrying capacity
the number that represents the largest number of individuals that a given environment can support
limiting factor
a factor that causes population growth to decrease
density-dependent limiting factor
a limiting factor that depends on population size such as competition, predation, parasitism, and disease
predator-prey relationship
the regulation of population by predation
density-independent limiting factor
a factor that affects all populations in similar ways, regardless of the population size such as unusual weather, natural disasters, sesonal cycles, & human activities (damming rivers and clear-cutting forests)
the scientific study of human populations
demographic transition
a dramatic change in birth and death rates
age-structure diagrams
population profiles