If you know NPP, what additional variable do you need to know to estimate NEP? Why might measuring this variable be difficult, for instance, in a sample of ocean water?

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08-09-2022
Biology

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If you know NPP, what additional variable do you need to know to estimate NEP? Why might measuring this variable be difficult, for instance, in a sample of ocean water?

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Martebi Martebi · Answer 1 · 2022-09-12T14:10:29+02:00

For estimation of NEP, a person will be required to measure the respiration of all organisms in a given ecosystem, not only the respiration of primary producers.

In regards to the sample of ocean water, the primary producers as well as other organisms are known to be mixed together, making their respective respirations very difficult to separate

What is a way that NPP can be measured?

In regards to terrestrial systems, NPP is one that can be calculated by knowing or finding the annual carbon storage increase.

One need to make use of the biomass and carbon storage estimates from a given sample site to be able to calculate aboveground NPP.

Therefore, For estimation of NEP, a person will be required to measure the respiration of all organisms in a given ecosystem, not only the respiration of primary producers.

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