Environmental Science 1021F/G Lecture Notes - Lecture 3: Ecosystem Diversity, Reproductive Isolation, Species Richness
10 Dec 2018
School
Department
Professor
Document Summary
Genetic diversity = within the species, and genes within species: genetic variation in the same species, ex. The population as a whole is more adaptable to changes in the environment: if we just had the white morph after the industrial revolution, then peppered moths would be extinct. Biological species concepts: populations whose members have the potential to interbreed and produce viable, fertile offspring but cannot do so with members of other species. If a species can no longer reproduce with another species, then that species is an isolated species: reproductive isolation shuts down gene flow. Allopatric: when a population splits and the 1) goes off in one direction, 2) goes off in another, and when they meet again they cannot reproduce with each other anymore. Sympatric: new species evolve from a single ancestral species while inhabiting the same geographic region. Functional diversity = the role that organisms play within ecosystems, ex. Detritivores: please can our family get some .
