Video and audio editing, Jennifer Hildebrandt

Narrator: Dan Smith.

First describes the concepts of community, co-evolution and ecological niche before looking at how competition results from overlapping niches and is reduced by resource partitioning. The program then examines predator-prey relationships and the various adaptations such as camouflage, warning coloration, mimicry and chemical warfare that have evolved as a result of these relationships. Sympiotic relationships such as parasitism, commensalism, and mutualism are then explored. A discussion of primary and secondary succession concludes the program. .