Human populations must achieve a working relationship with their environment

Human populations must achieve a working relationship with their environment

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o Human populations must achieve a working relationship with their environment. Sociologists have applied theories of ecology to the study of human communities, including use of the concept of ecosystem, with populations as their unit of study. Population Demography is the science dealing with the size, distribution, composition, and changes in population. Elements in Population Change. All population change within a society can be reduced to three factors: the birth rate, the death rate, and the migration rate into or out of the society. Demographers look at crude birth rate, general fertility rate, age-specific fertility, fecundity, zero population growth, crude death rate, age-specific death rates, and infant mortality rate. Migration affects population, and demographers measure the net migration rate. Movement may take the form of international migration or internal migration. Births, deaths, and migration affect the growth rate.
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