When you see lion fish or anacondas as invasive.. how does that work? If they live there how did they get there and what does it do to have invasive species that people are just killing animals to prevent it?
In: Planetary Science
in most cases invasive species get introduced by humans, we transport them somewhere else either intentionally or unintentionally and once they are there they start spreading.
Ecosystems have formed over millions of years and have developed a balance of where all species that exist at the current time are co existing.
This usually means that there are predators that will feed off other animals and keep that population in check while the other way around the population of the predators is kept in check by how much food is available to hunt for them.
Now when we talk about invasive species that can mean all kinds of things but in most cases these are animals introduced into an area where they have no predator that would keep their population down so they will reproduce uncontrollably and displace other native species by eating their food or taking their breeding grounds.
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