´╗┐Many species compete for aspects of an environment.
There are different types of competition and different reasons for each.

Interspecific Competition is competition between two species.
It takes place when two or more species rely on the same limited resource.

Competitive Exclusion occurs if two species are so similar in their requirements
that the same resource limits both species growth.
In this case, one species may succeed over the other.

A niche is within a community. Each species has a unique living arrangement called a niche.
A niche includes an organisms habitat, it's food sources, the time of day it is most active,
and many other factors specific to that organisms way of life.

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