The cow is a primary consumer, and the lettuce leaf on the patty is a primary producer. To represent these relationships more accurately, we can use a food web, a graph that shows all the …

Primary producers are marked in green, primary consumers in orange, secondary consumers in blue, and tertiary consumers in purple. Image credit: " Ecology of ecosystems: Figure 5," by OpenStax …

Learn about primary productivity, the (in)efficiency of energy transfer between trophic levels, and how to read ecological pyramids.

Learn about the roles of organisms as producers and consumers and how they relate to one another in food chains and food webs.

For example, 10% of a primary producer's biomass is transferred to the primary consumer, and 10% of that primary consumer's biomass is transferred to the secondary consumer and so on.

Energy flows through trophic levels in ecosystems. Grasses, as primary producers, harness sunlight into usable energy. Primary consumers like mice and grasshoppers eat the grass, gaining energy. …

Next, energy and matter move up the trophic levels of an ecosystem as producers are eaten by primary consumers, which are then eaten by secondary consumers, and so on. Some of the organic material …

A primary consumer eats producers (e.g., a caterpillar eating a leaf); a secondary consumer eats primary consumers (e.g., a robin eating the caterpillar). And it can go even further: a tertiary …

The trophic pyramid illustrates energy transfer within ecosystems, highlighting primary producers, consumers, and decomposers. Energy from the sun is stored as biomass, with only 10% transferred …

We can analyze the arrows in a food web to identify producers, primary consumers, secondary consumers, and decomposers.