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Several things could cause it. A decrease in any predator that feeds on mice will cause an increase in mice population because less of them will be eaten by other animals. An increase in the mice food supply could cause an increase in population too, especially if lack of food was the main limiting factor of the mice population. In very rare circumstances, additional mice could be brought in from other parts of the world by humans. There are some non-native fish living in lakes because someone put some in there and they started to breed.

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14y ago
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5mo ago

An increase in food availability, such as an abundance of seeds or vegetation, can lead to a population increase in mice. Additionally, a decrease in predation or competition can also contribute to a rise in mouse numbers.

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Q: What might cause an increase in the population of mice in a habitat?
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