Question

when a non native species is imported into a new ecosystem the population sometimes runs wild. explain why this might be the case

Answer 1

There may not be any predators for that new species. Therefore that specie is able to breed continuously and have no control over the population. Or it may bring diseases with it from its previous destination giving those diseases to the animals living in new ecosystem. Those animals wouldn't have resources or any adaptability to fight it off

Answer 2

    Well, there are a few explanations to this questions that could be right, but let's go to the obvious one.

    What can happen sometimes is that, when a new species is imported into a new ecosystem, it can cause some problems. For example, a plant is imported from Japan to Brazil and it is planted in the soil of a forest. This plant can either adapt to the environment or die because it's missing nutrients from Japanese soil. If this plant adapts, it can happen to in a way that this plant will take place of plants that usually were growing right there, taking their resources to grow up more and more, spreading fastly too. That is a process that can happen, it's a possibility, but, there's a very big chance of this happening in reality.

     We can either mention the example of an animal, it's easier to understand, if we put a new animal into a new environment, it can go wild because this animal can start eating other animals, and that can cause a serious problem for their population, since it's going to start growing faster and faster, and once this happens, it'll will reach a limit line, and that line is the line of competition for food.