An ecosystem has 10,000 units of energy at the producer level. If each trophic level transfers 10%, how much energy reaches the secondary consumers?
Answer
100 units
How to solve it
1
Producers: 10,000
2
Primary consumers: 10,000 × 0.1 = 1,000
3
Secondary consumers: 1,000 × 0.1 = 100
Hints
Energy decreases by 90% at each level
Calculate for two levels up