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EEB 122 - Principles of Evolution, Ecology and Behavior

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. (from oyc.yale.edu)

Lecture 14 - Species and Speciation

Time Lecture Chapters
[00:00:00] 1. Introduction
[00:03:38] 2. Diversity and How Speciation Happens
[00:17:13] 3. Concepts and Criteria of Speciation
[00:26:04] 4. The Genetics of Speciation
[00:34:41] 5. Mechanics and Examples of Speciation
[00:40:30] 6. Experiments, Applications, and Cryptic Species
[00:48:09] 7. Summary

References
Lecture 14 - Species and Speciation
Instructor: Stephen C. Stearns. Resources: the Yale Galapagos site. Transcript [html]. Audio [mp3]. Download Video [mov].

Go to the Course Home or watch other lectures:

Lecture 01 - The Nature of Evolution: Selection, Inheritance, and History
Lecture 02 - Basic Transmission Genetics
Lecture 03 - Adaptive Evolution: Natural Selection
Lecture 04 - Natural Evolution: Genetic Drift
Lecture 05 - How Selection Changes the Genetic Composition of Population
Lecture 06 - The Origin and Maintenance of Genetic Variation
Lecture 07 - The Importance of Development in Evolution
Lecture 08 - The Expression of Variation: Reaction Norms
Lecture 09 - The Evolution of Sex
Lecture 10 - Genomic Conflict
Lecture 11 - Life History Evolution
Lecture 12 - Sex Allocation
Lecture 13 - Sexual Selection
Lecture 14 - Species and Speciation
Lecture 15 - Phylogeny and Systematics
Lecture 16 - Comparative Methods: Trees, Maps, and Traits
Lecture 17 - Key Events in Evolution
Lecture 18 - Major Events in the Geological Theatre
Lecture 19 - The Fossil Record and Life's History
Lecture 20 - Coevolution
Lecture 21 - Evolutionary Medicine
Lecture 22 - The Impact of Evolutionary Thought on the Social Sciences
Lecture 23 - The Logic of Science
Lecture 24 - Climate and the Distribution of Life on Earth
Lecture 25 - Interactions with the Physical Environment
Lecture 26 - Population Growth: Density Effects
Lecture 27 - Interspecific Competition
Lecture 28 - Ecological Communities
Lecture 29 - Island Biogeography and Invasive Species
Lecture 30 - Energy and Matter in Ecosystems
Lecture 31 - Why So Many Species? The Factors Affecting Biodiversity
Lecture 32 - Economic Decisions for the Foraging Individual
Lecture 33 - Evolutionary Game Theory: Fighting and Contests
Lecture 34 - Mating Systems and Parental Care
Lecture 35 - Alternative Breeding Strategies
Lecture 36 - Selfishness and Altruism