Lectures (Video)
- 1. The Nature of Evolution: Selection, Inheritance, and History
- 2. Basic Transmission Genetics
- 3. Adaptive Evolution: Natural Selection
- 4. Neutral Evolution: Genetic Drift
- 5. How Selection Changes the Genetic Composition of Population
- 6. The Origin and Maintenance of Genetic Variation
- 7. The Importance of Development in Evolution
- 8. The Expression of Variation: Reaction Norms
- 9. The Evolution of Sex
- 10. Genomic Conflict
- 11. Life History Evolution
- 12. Sex Allocation
- 13. Sexual Selection
- 14. Species and Speciation
- 15. Phylogeny and Systematics
- 16. Comparative Methods: Trees, Maps, and Traits
- 17. Key Events in Evolution
- 18. Major Events in the Geological Theatre
- 19. The Fossil Record and Life's History
- 20. Coevolution
- 21. Evolutionary Medicine
- 22. The Impact of Evolutionary Thought on the Social Sciences
- 23. The Logic of Science
- 24. Climate and the Distribution of Life on Earth
- 25. Interactions with the Physical Environment
- 26. Population Growth: Density Effects
- 27. Interspecific Competition
- 28. Ecological Communities
- 29. Island Biogeography and Invasive Species
- 30. Energy and Matter in Ecosystems
- 31. The Factors Affecting Biodiversity
- 32. Economic Decisions for the Foraging Individual
- 33. Evolutionary Game Theory: Fighting and Contests
- 34. Mating Systems and Parental Care
- 35. Alternative Breeding Strategies
- 36. Selfishness and Altruism
Principles of Evolution, Ecology and Behavior - Lecture 14
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Lecture 14 - Species and Speciation
Speciation is the process through which species diverge from each other and/or from a common ancestor. There are several definitions of species, most of which focus on reproductive isolation and/or phylogenetic similarities. This can cause some controversy. Speciation can result from geographical separation or ecological specialization. There are stages of speciation in which organisms cluster first into distinct populations before finally becoming different species.
Prof. Stephen C. Stearns
EEB 122: Principles of Evolution, Ecology and Behavior, Spring 2009 (Yale University: Open Yale) http://oyc.yale.edu Date accessed: 2009-11-18 License: Creative Commons BY-NC-SA |
