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Ecosystems consist of heterotrophs and autotrophs.

The organisms can be put into energy pyramids with each level called a trophic level.

Tertiary consumerSecondary consumerPrimary consumerProducer

SPHAGNUM MOSS - PRODUCER

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Producers-Duckweed in Cypress Swamp

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Mussels eatmicroscopic plants

Primary Consumers eat producers

Primary consumers eat producers

Elephants eat approximately 150 pounds of vegetation daily.

Credit: © 2007 Lauren Humphries, Courtesy of life.nbii.gov

Used with permission with credit

Secondary consumers eat primary consumers

Credit: © 2010 Bruce Avera Hunter, Courtesy of life.nbii.govPermission to use with credit

Praying mantis eats honey bee

Tertiary Consumer

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Tertiary Consumers Eat Secondary Consumers

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Egrets eat frogs and snakes and other small predators

Lichens-2 organisms

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Trophic Levels

Tertiary Consumers

Secondary Consumers

Primary Consumers

Producers

Tertiary Consumers

Secondary Consumers

Primary Consumers

Producers