TOPIC: FOOD CHAIN AND TROPIC LEVELS OBJECTIVE The objective of this script is to know the basic concept of food chain and trophic levels in various ecosystems. Concept Plants convert solar energy into chemical energy stored in food material. The transfer of food energy from plants through a series of organisms forms the food chain. A phytoplankton may be eaten by a copepod, which is eaten by a small fish, the small fish is ultimately eaten by large fish, and large fish by a swan. This is a food chain that is generally observed in rivers. In pasture grasses are eaten by grasshopper and grasshopper by a toad. In the two examples the base of the food chain is formed by a plant, which is grazed on by a herbivore, which is predated by a carnivore, which is eaten by another carnivore. In nature, food chain relationships are very complex, as one organism may form the food source of many organisms. For example, grass may be grazed on by grasshoppers as well as rabbits ...