In addition to founder effects, the new population is often a very small population, so shows increased sensitivity to genetic drift, an increase in inbreeding, and relatively low genetic variation.
Selain efek pendiri, populasi baru tersebut sering kali berpopulasi kecil, sehingga menunjukkan sensitivitas yang besar terhadap hanyutan genetik, peningkatan perkawinan sekerabat, dan variasi genetik yang relatif rendah.