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week 4 Checkpoint- Population Size

week 4 Checkpoint- Population Size - America and they are...

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There are four reasons in which population size changes over time. The first factor in population size is the birth rate; how many infants being born in that year. Then we must look at the death rates; the rate in which humans are dying; these two factors would show the global population. In local population, we must look at how many humans are coming into the area (immigration) and how many humans are leaving the area (emigration). If the birth rates were higher than the death rate, the population size would be rising and vice versa; just like if the immigration rate were higher than the emigration rate, the size in the area would grow (Wiley Plus, 2006). In the video about Nutria; there are two factors resulting in the high population of these rodents. The first factor would be that these animals are immigrating to Louisiana from South
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Unformatted text preview: America, and they are not leaving the area yet. The largest factor leading to the high population rate; is the extremely high birth rate. According to Axia College (Wiley Plus, 2006), one Nutria can give birth to 40 offspring in a matter of three years. The offspring can then give birth to more offspring after only a six month period of time. With the Nutria being able to eat a quarter of their body of food a day; and the rapid multiplication of animals; the little rodents will meet the carrying capacity of the land. These little animals probably have a high biotic potential. The rodents will leave Louisiana after the food is gone and immigrate to another area. Maybe they will head back to South America. Reference Axia College. (2006). Wiley Plus. Retrieved from Axia College, Environmental Science website....
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