The highest percentage of energy in an ecosystem occurs at the level of the

The highest percentage of energy in an ecosystem occurs at the level of the producers. Producers, also known as autotrophs, are organisms that make their own food using sunlight, water, and carbon dioxide through a process called photosynthesis. They are usually plants, algae, and some bacteria. Producers are the foundation of the food chain, and all other organisms in the ecosystem depend on them for energy. When producers are eaten by primary consumers, such as herbivores, only about 10% of the energy stored in the food is transferred to the next level, which is the secondary consumers. This is known as the 10% rule. As a result, the highest percentage of energy is always found at the lowest level of the food chain, which is the producers.