Question

How many trophic levels are there in a forest ecosystem?

• A. 1
• B. 2
• C. 3
• D. 4

Hint:

Energy decreases by about 90\% at each successive trophic level (10\% law).

Answer 1

The Correct Option is D

Step 1: Concept.
Typical forest food chains include: producers (plants), primary consumers (herbivores), secondary consumers (small carnivores), and tertiary consumers (top carnivores).
Step 2: Conclusion.
Thus, commonly we consider four trophic levels in a forest ecosystem.