What is a consumer in the ecosystem

A consumer is an organism that obtains energy by eating other organisms or organic matter. Consumers are heterotrophs, unlike producers that build organic molecules from simpler substances using light or chemical energy.

How it works

Herbivores eat producers, carnivores eat other consumers, and omnivores use both kinds of food. Decomposers and detritivores process dead material and waste, helping nutrients cycle through ecosystems.

Example or application

A rabbit eating plants is a primary consumer; a fox that eats the rabbit is a higher-level consumer. A species may occupy different levels depending on what it eats.

Scope and limits

Food-chain labels simplify real diets. Food webs show overlapping relationships more accurately, and energy transfer between levels is incomplete.

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