Chapter 55 Ecosystems
- MinuteEarth: Beer & Biodiversity (2:33)
- Scitable: Trophic Cascades Across Diverse Plant Ecosystems
- Scitable: Keystone Species
- Interactive Map of Eutrophication & Hypoxia
- LabBench: Dissolved Oxygen and Aquatic Primary Productivity
- Monterey Institute Interactive Dissolve Oxygen Lab
- EPA: What is dissolved oxygen and why is it important?
- Nancy Knowlton (Smithsonian) Part 1: Coral Reefs: Past, Present and Future (56:15)
- Nancy Knowlton (Smithsonian) Part 2: Biodiversity and Why It Matters (47:16)