Immigration
When an organism enters a new community.
Increases the amount of genetic diversity found in a community.
The new organism provides food for its predators in the new community and utilizes food resources of its own.
Emigration
When an organism leaves a community
Organisms of the same type will have more food available to them.
Predators will have less food due to the loss of a prey organism.
Reduces the amount of genetic diversity found in a community.
