ENVI 101 Lecture Notes - Lecture 8: Galápagos Islands, Niche Differentiation, Reproductive Isolation
27 Sep 2016
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Brown beetle finds green beetle population, mixing of alleles. Darwins finches: the finches had different beaks, which related to what the fed on, so darwin thought about resource partitioning, which led to him understanding that each of these finches occupies a different niche on the island. Evolution of medium ground finch following drought year. Their beaks grew to adapt to the conditions, and then this trait was passed on to subsequent population, so we saw a change over time (evolution) Some survive and pass on genes, some dont. Traits are genetically based and will be based on from parents to offspring. End result= change in population over time. Adaptations: any heritable trait that improves the ability of an individual organism to survive and reproduce at a higher rate than other individuals in a population. Geological processes and climate change affect evolution. Geographic isolation can lead to reproductive isolation.
