The three pressures that lead to biodiversity according to E.O. Wilson’s theory of island biogeography are immigration, island area and extinction.
Explanation:
Wilson´s theory predicts a dynamic equilibrium with a constant number of species through time from a balance between immigration and extinction. Wilson’s theory of island biogeography says that when the number of species increases, the immigration will drop and Extinction will increases with the number on species of the islands.At a given time, species richness on island is saturated for a new species to colonize as an immigrant, an existing resident species have to become locally extinct due to competition with other species for resources.
Wilson predicts that species richness increases with island area but decreases with isolation
