As you now know, a healthy ecosystem should have many types of plants, animals, insects, fungi, and bacteria. It is also important to remember that a healthy ecosystem has more plants (primary producers) and decomposers than herbivores and carnivores. There are also more herbivores than carnivores. Why, you ask?

The picture to the right shows a food pyramid. Arrows show direction that energy is flowing (the arrow pointing from the primary producers to the herbivores means that energy is moving from the plants to the herbivores).

See how many acorns it takes to feed one squirrel in a year!

Food Pyramid