Asked by bob
A pyramid of biomass is one way to model an ecosystem. How does the amount of biomass generally change from the bottom of the pyramid to the top?
A. The amount of biomass decreases.
B. The amount of biomass increases.
C. The amount of biomass varies only slightly, and may increase or decrease.
D. The amount of biomass varies widely, and both increases and decreases
All Answers 1
Answered by
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A. The amount of biomass decreases.
Explanation: Producers (plants, algae) at the base have the most biomass, and energy transfer between trophic levels is inefficient (about ~10% rule), so less biomass is supported at each higher trophic level. (Note: some systems, e.g. certain aquatic food chains, can show inverted biomass pyramids.)
Explanation: Producers (plants, algae) at the base have the most biomass, and energy transfer between trophic levels is inefficient (about ~10% rule), so less biomass is supported at each higher trophic level. (Note: some systems, e.g. certain aquatic food chains, can show inverted biomass pyramids.)
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