What are trophic levels? Give an example of a food chain and state the different trophic levels in it.

Trophic levels

1. The various steps in the food chain at which the transfer of food energy takes place are called trophic levels
2. Example: Pond chain operating in a grassland, Grass →Insects→ Frogs→ Birds.

• Grass →1 trophic level
• Insects →2 trophic level
• Frogs →3 trophic level
• Birds →4 trophic level