Unformatted text preview: asymmetric when a species has lower fitness when placed with another, and this is because their niches completely overlap. During niche overlap species are competing for resources vital for living, but one species usually has a certain trait that leads to higher fitness, therefore enabling them to steer their competition towards extinction (evolution by natural selection). A different outcome is seen in various species of the Galapagos Finches that inhabited the same area. Their niches did not completely overlap, which led to niche differentiation, meaning the competing species evolved traits (different beak sizes) that allowed them to take advantage of different resources (different seeds) and areas....
View Full Document
- Winter '08
- Evolution, Paramecium aurelia, Competitive exclusion principle, P. caudatum, Paramecium caudatum, P. aurelia