The long term effects of competition on populations of two different species competing for the same source are as follows:
1. It becomes a situation of the survival of the fittest. For example, if two populations of plants compete for the same source, the stronger of the two species will overpower the weaker of the two species. Trees that grow taller will block out the sun and the smaller trees will die. In the animal kingdom, the strongest of the predators that compete for the same prey will survive.
