Trophic Levels, Energy transfer and Pyramids. Vocabulary. Trophic Levels – is the position an organism occupies in a food chain. It refers to food or feeding. Apex predator – top level predators with few or no predators of their own. Food Chain. Food Chains.
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Food webs show ALTERNATIVE PATHWAYS other possible pathways through which an organism can obtain energy
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Three hundred trout are needed to support one man for a year. The trout, in turn, must consume 90,000 frogs, that must consume 27 million grasshoppers that live off of 1,000 tons of grass. -- G. Tyler Miller, Jr., American Chemist (1971)