Summary:
- Ecological pyramids can demonstrate the decrease in energy, biomass or numbers within an ecosystem.
- All food chains and webs have at least two or three trophic levels.
- Energy is passed up a food chain or web from lower to higher trophIC levels.
- Generally, there are a maximum of four trophi levels.
- Sometimes there may be a fifthtrophic level, but usually there’s not enough energy left to support any additional levels.
- Many consumers feed at more than one tropho level.