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.
Food webs show ALTERNATIVE PATHWAYS other possible pathways through which an organism can obtain energy
100% Energy Available
10% Original Energy!
1% Original Energy!
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)