The diagram below shows an example of a food web from Lake Ontario. Primary producers are marked in green, primary consumers in orange, secondary consumers in blue, and tertiary consumers in purple.

This diagram of an Arctic ecosystem food web highlights many feeding interactions among organisms. Arrows indicate the flow of energy and matter between organisms.

The diagram below shows an example of a food web from Lake Ontario. Primary producers are marked in green, primary consumers in orange, secondary consumers in blue, and tertiary consumers in purple.

This diagram shows three ecological pyramids: energy, biomass, and numbers. The pyramids show the amount of energy, amount of biomass, or the number of organisms in an ecosystem across trophic …

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

How food chains and food webs represent the flow of energy and matter. Trophic levels and efficiency of energy transfer.

A food web is a model of feeding relationships in an ecosystem. When an organism is eaten, the matter and energy stored in its tissues are transferred to the organism that eats it.

But wouldn't it be nice to have a diagram that captures this information in an easy-to-process way? Ecological pyramids provide an intuitive, visual picture of how the trophic levels in an ecosystem …

And so these are primary producers, these plants in this diagram. Sometimes you'll see them referred to as autotrophs. They are getting their own food from the Sun, from this energy. And once again, how …

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