1. Roles in an Ecosystem Producers Consumers (herbivore, carnivore, omnivore, decomposer, detrivore) VideoVideo: The Importance of Decomposers Write down five important uses of these organisms Trophic level – place in a food chain  Plants are in the 1 st trophic level  Herbivores are in the 2nd

2. Pyramid of Numbers Shows how many organisms are present at each trophic level

3. Energy Pyramid Shows how much energy is at each trophic level. The size of a food chain is limited, because of the amount of energy passed on.

4. 10% Rule Only about 10% of the energy in one trophic level passes to the next. Does this violate the law of conservation of energy? Where does the energy go?