27. Interspecific Competition

Principles of Evolution, Ecology and Behavior (EEB 122) Competition among species, or interspecific competition, can have an even greater effect on selection than competition within species (intraspecific competition). This is often the case in lower density populations. Different species can have positive, neutral, or negative effects on each other's fitness, and the effect species 1 has on species 2 is not necessarily the same that 2 has on 1. The effects that cohabiting species have on each other shapes evolution the same way that selective pressures from within a species or the physical environment shapes it. 00:00 - Chapter 1. Introduction 01:21 - Chapter 2. Classical Patterns 07:43 - Chapter 3. Experiments Demonstrating Competition 14:22 - Chapter 4. Conceptualizing Competition 33:02 - Chapter 5. The Reality of Competition 38:16 - Chapter 6. Conclusion Complete course materials are available at the Open Yale Courses website: http://open.yale.edu/courses This course was recorded in Spring 2009.