- The Flow of Energy
- The energy captured by photosynthetic organisms is called primary productivity.
- Organisms occupy different trophic levels based on how they acquire energy.
- Food chains and food webs describe the feeding relationships within ecosystems.
- Energy flows through trophic levels.
- Biological magnification occurs as toxic substances are passed through trophic levels.
- The Cycling of Nutrients
- The carbon cycle is an atmospheric cycle.
- The nitrogen cycle is an atmospheric cycle.
- The phosphorus cycle is a sedimentary cycle.
- Most water remains chemically unchanged during the water cycle.
- Human Intervention in Energy Flow and Nutrient Cycling
- Acid rain is caused by overloading the nitrogen and sulfur cycles.
- Interference with the carbon cycle is causing the greenhouse effect.
- Biodiversity and Ecosystem Stability
- The energy captured by photosynthetic organisms is called primary productivity.
Designed in cooperation with
Andrew Stull and Steven Brunasso.
Last Update - July 25, 1997
