population pyramids. population pyramids graph that shows the percentage of population in certain...
TRANSCRIPT
POPULATION PYRAMIDS
Population PyramidsGraph that shows the percentage of
population in certain age groupsSeparates Male and FemaleAllows you to make predictions
Deciphering Population Pyramids
http://www.prb.org/Multimedia/Video/2009/distilleddemographics1.aspx
In this first video, "Deciphering Population Pyramids," PRB senior demographer Carl Haub shows how population pyramids give us a snapshot of a country's demographic profile. But what do they tell us about a country's past and future? "These videos not only show that demography can be exciting, but also highlight how population trends and issues affects the well-being of us all," says Haub. "Fertility, mortality, and migration—along with other demographic issues—play a major role in determining what kind of opportunities and challenges people face in their communities and countries."
Stage OneHigh Birth RateHigh Death RateResult: slow growth ratesPre-industrial, hunter/gatherer societies
in remote areas.
Stage TwoHigh Birth RateLow or Falling Death
RateResult: Rapid Growth
RateVery LOW Standard of
LivingFound In Least
Developed CountriesSouth AmericaSouthern AfricaAsia
Stage ThreeModerate to High Birth RateLow Death RateResult: Explosive Growth RatesCauses a large population increase, but
standard of living remains low Developing Countries and the Newly
Industrialized CountriesFound In Countries:
MexicoSoutheast AsiaMiddle East
Stage FourLow birth ratesLow death ratesResult: slow or no
growth ratesPopulation slowly
increases, with a high standard of living
Developed CountriesUSACanadaAustralia Europe
Stage FiveNegative Birth Rate
NEGATIVE or NO GROWTH
Low Death RateResult: No growth, even
population lossPopulation begins to
shrink, usually has a high standard of living
Found In “Post-Developed” CountriesGermanySwedenNorwayItaly
Rapid, Slow, Zero and Negative Population Growth
http://www.bio.georgiasouthern.edu/bio-home/harvey/lect/images/agestructure.gif
High fertility and mortality = broad base
Low fertility and mortality = narrow base
Time to make a population pyramid !!