In a food-chain, a trophic level represents a functional level, not a species. Explain.”
In a food chain, a trophic level represents a functional level: Trophic level is a step or division of the food chain. It is characterized by the method of obtaining food. The number of trophic levels is equal to the number of steps in the food chain. The two fundamental trophic levels are producers and consumers. Producers are autotrophic organisms found in the ecosystem which synthesize food from raw materials. There are many such organisms at this level that comprise the first trophic level and not just one species, e.g. green algae plant, phytoplankton, etc.
