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3- rate of natural increase and evolution of global population - Coggle…
3- rate of natural increase and
evolution of global population
natural increase
what is?
is the difference between the birth and death rate.
increase
positive
births outnumber deaths
negative
deaths outnumber births
differences
more developed countries
weak natural increase / negative
less developed countries
high rate of natural increase
demographic transition theory
what is?
says that evolution moves though three demographic regimes
birth, mortality and natural increase rates
pre-industrial demographic regimes
birth rate is high
fertility rates is clased as natural
mortality rate is high
life expentancy is low
rate of natural increase is low
demographic transition
first phase
birth rate high
death rate falls
rate of natural increase very high
second phase
birth rate falls
death rate falls
natural increase rate is low