How do you calculate the adjusted amount of energy that is available to organisms that are one trophic level above producers?(1 point)

Question

Responses

gross primary productivity minus amount of organic material used in respiration
gross primary productivity minus amount of organic material used in respiration

net primary productivity plus amount of organic material used in respiration
net primary productivity plus amount of organic material used in respiration

gross primary productivity minus net primary productivity
gross primary productivity minus net primary productivity

net primary productivity plus gross primary productivity 

Answer 1

To calculate the adjusted amount of energy that is available to organisms that are one trophic level above producers (such as primary consumers), you would use the measure known as net primary productivity (NPP). NPP represents the total energy that remains in plant biomass after accounting for the energy used in respiration.

The correct calculation can be summarized as:

Net Primary Productivity (NPP) = Gross Primary Productivity (GPP) - Energy used in respiration by producers.

Therefore, the energy available to organisms at the next trophic level (primary consumers) is equal to net primary productivity (the energy remaining after plants have used some for their own respiration).

So the correct response is:

gross primary productivity minus amount of organic material used in respiration (which effectively describes how NPP is calculated).