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Biology 19 Online
OpenStudy (anonymous):

why is an ecological pyramid (trophic levels) smaller at the top than at the bottom?

OpenStudy (anonymous):

Im sorry what?

OpenStudy (anonymous):

Because the amount of energy gets 10% smaller at each level of the pyramid.

OpenStudy (bioepic):

Also, the number of organisms at each level decreases as you go up.

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