Biology / Bio 3689 · Atom · ~20 seconds
Gross and Net Primary Productivity and Ecological Pyramids
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Gross primary productivity is the energy producers fix; net primary productivity is what remains after their own respiration, the energy an energy pyramid narrows by.
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A forest with high gross productivity but heavy respiration can show lower net productivity than a marsh fixing less energy.
Watch for
A pyramid of energy always narrows upward, but a pyramid of numbers or biomass can invert.