How to calculate ecological efficiency?

To calculate ecological efficiency, follow these steps:

1. Determine Energy Input: Identify the amount of energy or biomass at a lower trophic level (e.g., primary producers). This is usually measured in units like calories (kcal), joules (J), or grams of biomass.
2. Determine Energy Output: Identify the amount of energy or biomass at the higher trophic level (e.g., primary consumers or secondary consumers).
3. Calculate Efficiency: Use the formula for ecological efficiency:

Example Calculation:

Suppose:

• Primary producers (plants) have 10,000 kcal of energy.
• Primary consumers (herbivores) have 1,000 kcal of energy.