BIS 2B Lecture Notes - Lecture 16: Sexual Selection, Allopatric Speciation, Speciation

• School: UC-Davis
• Department: Biological Sciences
• Course: BIS 2B
• Professor: strauss,gerhart

Document Summary

Terrestrial groups speciate more quickly than aquatic species. Diet specialization - generalists specialize more slowly than specialist species. Specialist speciate more quickly because you can tailor your diet to one food type, diverging from sister species because of this. Pollinators - animal pollinated plants speciate more quickly than wind pollinated plants. Sexual selection - more different males and females, quicker the speciation. Dispersal ability - smaller dispersal size, quicker speciation because it may create allopatry. Evolutionary radiation: occurs when rapid speciation results in a burst of new species from single ancestor. Adaptive radiation: results in species adapted to particular environments and filling diff ecological niches. Galapagos finches adaptively radiated beak type to specialize for specific food source. Dubautia waialealae live in wet areas of low elevation.