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Biodiversity

Biodiversity. By: Adrian Gomez. Types of Diversity. Genetic diversity-involves the range of all genetic traits, both expressed and recessive Species diversity- # of different species that inhabit a specific area

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Biodiversity

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  1. Biodiversity By: Adrian Gomez

  2. Types of Diversity • Genetic diversity-involves the range of all genetic traits, both expressed and recessive • Species diversity- # of different species that inhabit a specific area • Ecosystem diversity- range of habitats that can be found in defined area composed of both biotic and abiotic components

  3. Natural Selection • How organisms evolve • Shows what organism has adapted, survived, reproduced, and pass it on to off springs in new environment • Without a change in environment, evolution nor natural selection would occur

  4. Stabilizing Selection • Affects the extreme of the population • Most common from of natural selection • Individuals that deviate too far from normal conditions are removed

  5. Directional Selection • Affects the extreme of the population • Do very well in future generations

  6. Disruptive Selection • Acts against individuals that have the avg condition • Favor individuals at the extreme ends • Population is almost split in two • Evolution occurs

  7. Evolution • Change in the genetic composition of a population during successive generations as a result of natural selection acting on yhe genetic variations among individuals and resulting in the development of new species

  8. Speciation • When segments of a population of one species become so isolated that gene flow stops • 3 types of adaptive radiation: • General radiation-species develop new abilities to reach new parts of the environment • Environmental change-species that can survive in radically changed environment and branch into new species • Geographic isolation-isolated ecosystems can be colonized by a species that undergoes rapid evolution

  9. Convergent Evolution • Process whereby organisms not closely related to each other independently acquire characteristics while evolving in separate and sometimes varying ecosystems

  10. Parallel Evolution • When 2 species evolve together at the same time and in the same ecosystem and acquire similar characteristics

  11. Ecological Succession

  12. Extras 2 links Video link http://youtu.be/3JeYaFGYOSM • http://plato.stanford.edu/entries/biodiversity/ • http://www.nwf.org/Wildlife/Wildlife-Conservation/Biodiversity.aspx

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