Which of the following best describes the direction of energy flow through an ecosystem?

• A. From secondary consumers to primary consumers to producers to decomposers
• B. From primary consumers to producers to decomposers to secondary consumers
• C. From producers to primary consumers to secondary consumers to decomposers
• D. From decomposers to secondary consumers to primary consumers to producers

Answer: (C)

Verified step by step guidance

1. Understand the concept of energy flow in an ecosystem: Energy flows through an ecosystem in a linear fashion, starting from the sun and being captured by producers (autotrophs) through photosynthesis. Producers convert solar energy into chemical energy stored in organic molecules.
2. Identify the role of producers: Producers, such as plants and algae, are the foundation of the energy flow. They create energy-rich compounds that serve as food for other organisms in the ecosystem.
3. Examine the role of primary consumers: Primary consumers (herbivores) feed directly on producers, transferring the energy stored in producers to themselves.
4. Analyze the role of secondary consumers: Secondary consumers (carnivores or omnivores) feed on primary consumers, further transferring energy up the food chain.
5. Understand the role of decomposers: Decomposers break down dead organic matter from producers, primary consumers, and secondary consumers, recycling nutrients back into the ecosystem but not directly contributing to the linear energy flow.