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Eco Systems

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| Population Changes | | | Helen Hill | 11/24/2011 | SCI/275 Instructor: Tori Robinson

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Population Changes

The four factors that produce population size are: 1) Birth, 2) Death, 3) Immigration, and 4) Emigration. Birth is the increase of population by the ratio of births and people in a specified area, death is the decrease of population by the ratio of deaths and people also in a specified area, immigration is an increase of population by people moving into a new country, and emigration is the decrease of population by people moving out of a country. The factors that affected the population size of the Nutria is the fact that they were brought into this country and that the fact that they are not native to our country. Another factor is that the female within three years can produce up to 40 offspring and within six months of age the babies are ready to reproduce as well. What I think would happen to the Nutria if their food source would be depleted is that they would either die off, or they would emigrate to another area that has the same type of food source that they are accustomed to. If that did not happen they would adapt to new food sources which are similar to what they are accustomed to eating. Being that the Nutria are vegetarians and only eat the green vegetation, which is found in the wetlands of Louisiana, they would have to find other wetlands or swamps to feed off of. The Nutria has adapted well to the swamps and wetlands of Louisiana and has caused economic problems for these areas by destroying the lands by eating on quarter of their weight in vegetation a day. Once lush green wetlands have now become waterways or small lakes due...

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