All organisms, living or dead, are potential food sources for other living organisms. A caterpillar eats a leaf, a robin eats the caterpillar, and a hawk eats the robin. Decomposers consume the leaf, caterpillar, robin and hawk after they die. therefore, there is very little matter wasted in natural ecosystems. The food chain, or the more realistic food web, are ways to model the energy that gets transferred from one organism to the next. As you can see from the pyramid, it takes many more producers to support a group of herbivores and many more herbivores to support carnivores.
Go to the following websites and complete the activities at each site.
Make three to five observations based on your experience going through the activities.