The Measures of Net Primary Production (NPP)and Net Ecosystem Production

question 33

Multiple Choice

The measures of net primary production (NPP) and net ecosystem production (NEP) both can be used to quantify gross primary production (GPP) .Which of the following most correctly explains a difference between these two measures?

• A)NPP measures GPP minus the energy used by all heterotrophs.
• B)NEP measures GPP minus the energy used by all autotrophs.
• C)NPP measures GPP minus the energy used by primary producers.
• D)NEP measures GPP minus the energy used by primary consumers.
• E)NPP measures GPP minus the energy used by all detritivores.

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