In an ecosystem, what will eventually happen to all incoming energy?

• A. It will be transferred from one trophic level to the next.
• B. It will be transferred to the decomposers.
• C. It will be used in photosynthesis.
• D. None of the listed responses is correct.
• E. It will be dissipated as heat.

Answer: (E)

Verified step by step guidance

1. Understand that energy in an ecosystem primarily enters through sunlight, which is captured by producers (like plants) during photosynthesis.
2. Recognize that energy is transferred through the ecosystem via trophic levels, starting from producers to various levels of consumers (herbivores, carnivores, etc.).
3. Acknowledge that during each transfer of energy from one trophic level to the next, a significant portion of energy is lost as heat due to metabolic processes, as described by the second law of thermodynamics.
4. Consider the role of decomposers, which break down dead organisms and waste, releasing energy as heat in the process.
5. Conclude that ultimately, all incoming energy in an ecosystem is dissipated as heat, as energy transformations are not 100% efficient and energy is continually lost to the environment.