In the context of energy flow through ecosystems, approximately how much energy is transferred from one trophic level to the next higher trophic level?

• A. About 10%
• B. About 90%
• C. About 1%
• D. About 50%

Answer: (A)

Verified step by step guidance

1. Understand the concept of energy transfer in ecosystems: Energy flows through ecosystems via trophic levels, starting with producers (plants) and moving up to primary consumers, secondary consumers, and so on. Energy is lost at each level due to metabolic processes and heat.
2. Recall the '10% Rule': In general, only about 10% of the energy from one trophic level is transferred to the next higher trophic level. This is a widely accepted ecological principle.
3. Analyze why energy is lost: Energy is lost primarily due to respiration, heat production, and incomplete consumption or digestion of organisms at each trophic level.
4. Compare the given options: Evaluate the options provided (About 10%, About 90%, About 1%, About 50%) in light of the 10% Rule. Only one option aligns with the principle.
5. Conclude based on ecological principles: Select the option that matches the approximate energy transfer percentage (10%) and understand its significance in limiting the number of trophic levels in an ecosystem.