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Listed under:  Science  >  Life  >  Ecosystems  >  Food webs  >  Food chains  >  Producers (Food chains)
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Simple ecosystem diagram

This is a colour graphic representing the energy and nutrient flow in a simple food chain. The Sun and organisms making up the food chain are represented in diagrammatic form. The graphic is labelled and a key to the colour-coding of energy and nutrient flows is included.

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Marine trophic pyramid

This image displays a type of diagram known as a trophic (or ecological) pyramid. This example depicts the organisms and the matter and energy flows in a typical marine ecosystem. The diagram shows six levels of organisms from primary producers through to the top carnivores, arranged in a pyramid. Also represented is the ...

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Tuna sandwich trophic pyramid

This image is a diagram known as a trophic pyramid. This example shows the levels of an ecosystem that support the growth of tuna, which might be consumed by a human in a tuna sandwich. The diagram shows six levels in the 'pyramid' from phytoplankton through to humans, and visually depicts the size of the biomass at each ...

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Concept cartoon: producers

This image is a concept cartoon. It shows a boy and a girl discussing food chains. One character is stating that producers are always at the start of a food chain, while the other character is refuting this. The cartoon is intended as a stimulus for further discussion of the concept.