Arrows go from each prerequisite to the units that depend on it. Hover or focus a unit to highlight its path.
- Ecological organization from organisms to populations, communities and ecosystems article
- Autotrophy and heterotrophy as carbon-acquisition strategies article
- Trophic levels, food chains and food webs article
- The nitrogen cycle across atmospheric, inorganic and organic pools article
- Phosphorus cycling through rocks, soils, water and biomass article
- Limiting nutrients and controls on ecosystem productivity article
- Secondary production and trophic transfer efficiency article
- Ecological pyramids of energy, biomass and abundance article
- Energy flow versus matter cycling in ecosystems article