ES101 Lecture Notes - Lecture 14: Allopatric Speciation, Sugar Glider, Generalist And Specialist Species
Document Summary
How a species interacts with other living and non-living components of the ecosystem. Role a species plays in the energy flow and matter cycling in an ecosystem. Fundamental niche: full potential range of physical, chemical conditions if there was no competition. Realized niche: part of fundamental niche bc of competition. Divergent evolution: single species evolve into variety of species with diff adaptions. Convergent evolution: 2 distant groups develop similar adaptions bc of environment. Speciation: creation of new species bc of natural selection, 2 species arise from one. Allopatric speciation: process of speciation that occurs from long term isolation of two populations of the same species, 2 phases: Geographic isolation: diff groups become isolated from one another: ex. pop migrates to find food. Reproductive isolation: mutation and natural selection operate independently if. Sympatric speciation: less common, creation of new species when groups live close together and can t interbreed bc of mutation.
