ERSC 2700 Lecture Notes - Lecture 14: Natural Selection, Biogeography, Genetic Drift

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Biodiversity can refer to: geneic diversity, habitat diversity, species diversity. Geneic material: genes carry the code for paricular traits and are inherited: genes are made up of a chemical compound called dna chemical building blocks consising of a 4-alphabet code. Spread and lead to the formaion of a new species. Natural selecion there is natural variaion in the gene pool of a species: populaions inhabiing diferent environments can result in difereniaion. Evoluion over the last 3. 5 billion years or so has led to the existence of 1. 5 million named species. Habitat is the actual locaion in the environment where an organism lives; where the niche requirements are met. Both niche and habitat are important in conservaion to conserve a species, we must ensure that a habitat coninues to meet its niche requirements. Fundamental niche vs. realized niche : fundamental is the enire area they could live but realized is where they actually live.

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