21. Allopatric speciation is where new gene pools arise out of natural selection in isolated gene pools.22. Allopatric speciation appears to have played an important role in shaping the evolution of this genus.23. These species are allopatric , meaning they do not share the same habitat in any location. 24. Overall, their appearance is somewhat similar to several other pelicans, though the species is allopatric . 25. It is thought that they first originated through allopatric speciation caused by breakup of the supercontinent Gondwana. 26. But the different appearance and allopatric ranges argue in favor of recognizing the two as distinct species. 27. Isolation can induce allopatric speciation usually through genetic drift, and different environments induce different evolutionary pressures. 28. This differs from allopatric speciation in that the isolated populations are numerically much smaller than the parental population. 29. The separate populations over time may Galapagos finches, is a consequence of allopatric speciation among island populations. 30. Rather, in these birds it indicates a fairly recent allopatric selective pressure towards establishment of genetic incompatibility.
