EEB 122 - Principles of Evolution, Ecology and Behavior
Lecture 28 - Ecological Communities. The idea of ecological communities has changed tremendously over the past forty years. The classical view stated that there were so many different species because evolution packed them tightly into the available niches. The modern view emphasizes the idea of trophic cascades, or top-down control in food chains. This emphasized the importance of predation in ecology, although it downplayed the significance of food webs, which showed the interrelated nature of ecosystems better than simple food chains. (from oyc.yale.edu)
| Lecture 28 - Ecological Communities |
| Time | Lecture Chapters |
| [00:00:00] | 1. Introduction |
| [00:01:45] | 2. The Classical View |
| [00:04:42] | 3. Trophic Cascades |
| [00:23:08] | 4. Community Assembly |
| [00:37:48] | 5. Meta-communities |
| [00:44:26] | 6. Conclusion |
| References |
| Lecture 28 - Ecological Communities Instructor: Stephen C. Stearns. Transcript [html]. Audio [mp3]. Download Video [mov]. |
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