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Week 4 Check Point Population Size.

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Week 4 Check Point Population Size
The four factors that cause changes in the populaon size of any area are birth rate, death rate,
emigraon and immigraon. If the birth rate of something if faster than the death rate then the
populaon will grow, just as is does with the human populaon. Then the factor of immigrang
to a new country or area also helps the populaon grow for that area. Then the factor of
emigraon is the act of leaving an area or country and decreasing the populaon size. This is
what is happening to North America and South America. North America is receiving more
immigrants every year raising our populaon while South America is decreasing because of the
emigraon from their countries.
In the video we were assigned to watch I feel that the Nutria will eventually end up killing a
large part of their populaon o". By reproducing in vast numbers each year these creatures are
unknowingly depleng their food source. A$er their numbers are higher than what the area can
feed most will end up starving to death while others might even migrate to other areas. Unless
the populaon of the Nutria is stopped form outgrowing the food source in their area I feel they
will decline sharply in populaon unl the food source can replenish itself once again. This
would only start the cycle over, unless there is some kind of intervenon from the government
involved.

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Week 4 Check Point Population Size The four factors that cause changes in the population size of any area are birth rate, death rate, emigration and immigration. If the birth rate of something if faster than the death rate then the population will grow, just as is does with the human populatio ...
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