In essence, it says that a GA gives exponentially increasing reproductive trials to above average schemata. This gives a GA with a population of size N a speedup by a factor of N cubed, compared to a random search. The act of modeling a natural process.
Speciation is very important in evolutionary biology.
Techniques analogous to geographical isolation are used in a number of GA s. The existence of different species allows different ecological niches to be exploited. Furthermore, the existence of a variety of different species itself creates new niches, thus allowing room for further species. Thus nature bootstraps itself into almost limitless complexity and diversity. Conversely, the domination of one, or a small number of species reduces the number of viable niches, leads to a decline in diversity, and a reduction in the ability to cope with new situations.