E&EB 122 - Lecture 28 - Ecological Communities

Lecture 28 - Ecological Communities

Overview

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.

Resources

You may view the Yale Galapagos site at: http://cmi2.yale.edu/galapagos_public

Assignment

Cotgreave, Peter and Irwin Forseth. Introductory Ecology, chapter 11

Course Media

Transcript

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Audio

mp3

Low Bandwidth Video

mov [100MB]

High Bandwidth Video

mov [500MB]