Chapter 5 Populations

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Chapter 5 Populations

population density

number of individuals per unit of area

immigration

movement of individuals into an area occupied by an existing population

emigration

movement of individuals out of an area

exponential growth

growth pattern in which the individuals in a population reproduce at a constant rate

logistic growth

growth pattern in which a population's growth rate slows or stops following a period of exponential growth

carrying capacity

largest number of individuals of a population that a given environment can support

limiting factor

factor that causes the growth of a population to decrease

density-dependent limiting factor

limiting factor that depends on population size

predator-prey relationship

mechanism of population control in which a population is regulated by predation

density-independent limiting factor

limiting factor that affects all populations in similar ways, regardless of population size

demography

scientific study of human populations

demographic transition

change in a population from high birth and death rates to low birth and death rates

age-structure diagram

graph of the numbers of males and females within different age groups of a population

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