Biology
Trophic Levels
Quick fact
Only about 10% of the energy from one trophic level is passed to the next.
Why this is interesting
Did you know that a single tree can support an entire forest of animals, all connected by what they eat?
Read the full explanation
Understanding Trophic Levels
Trophic levels are like rungs on a ladder. The bottom rung has plants that make their own food using sunlight, called producers. Above them are animals that eat plants, known as primary consumers. Then come secondary and tertiary consumers who eat other animals. Finally, decomposers break down dead matter to recycle nutrients back into the environment.
A deeper explanation
Trophic levels represent how energy moves through an ecosystem, with each level losing most of its energy as heat due to metabolic processes. This loss explains why food chains are usually short and why ecosystems rely on a large base of producers to sustain higher-level consumers.