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Demographic Transition Model

Victoria K Biology Inglés 1 página

Demographic Transition Model

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Demographic Transition Model

Stage 1:

-Birth rate & death rate fluctuate at a high level, population stays low.

-Birth rate high due to no birth control or family planning, education is poor.

-High infant mortality

-Death rate high due to poor health care, sanitation and diet, leading to disease & starvation.

Stage 2:

-Death rate falls, birth rate remains high, population increases rapidly.

-Death rate falls due to improved health care, sanitation, & diet.

-Birth rate remains high due to little birth control or family planning.

Stage 3:

-Birth rate falls rapidly, death rate falls gradually, population increases at slower rate.

-Birth rate falls rapidly due to increased use of birth control & family planning.

Stage 4:

-Birth rate & death rate fluctuate at low levels, population stable but high.

-Birth rate low due to increased demand for luxuries & material possessions, less money available for children.

-People have fewer children as not as many die at a young age.

Stage 5:

-Birth rate begins to fall, death rate remains stable, population begins to decrease.

-Birth rate falls due to expenses involving children, dependent elderly relatives.

-Death rate remains steady despite health care advances as larger generations of elderly people die.

Demographic Transition Model

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(Populations, Energy and Ecosystems ) Biology Apunte sobre Demographic Transition Model, creado por Victoria K el 17/04/2015.
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Victoria K
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