Is a protozoa a primary consumer?

Protozoa can be classified as primary consumers, but it depends on their specific diet. Many protozoa are heterotrophic and feed on bacteria, algae, and other organic matter, making them primary consumers in some ecosystems. However, some protozoa are also predators, consuming other microorganisms, which places them higher in the food chain. Thus, while some protozoa serve as primary consumers, others fulfill different roles in their respective food webs.