Life In a Community
3.1 Many Interactions Are Indirect
3.2 An Ecosystem: Many Populations Interact in a Community
3.3 A Niche Is the Role of an Organism
3.4 Organism May Benefit or Harm One Another
3.1 - 3.4 Review
Ecosystem Structure
3.5 Boundaries of Ecosystems Overlap and Change
3.6 Most Communities Have More Producers Than Consumers
3.5 - 3.6 Review
Ecosystem Stability and Human Influences
3.7 Humans Lower the Stability of Ecosystems
3.8 Humans Threaten the Diversity of Organisms
3.9 The Value of Biodiversity
3.10 Humans Also Can Help Conserve Species
3.7 - 3.10 Review