24. What is the formula of the
net primary production (NPP)?
How does NPP relate to the
energy pyramids?

Gap-fill exercise

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Net primary production is gross
primary productivity less organic
material consumed as source in
the metabolism the producers: NPP=
GPP – ( material spent in
respiration). It represents the
material available in the trophic
level.

The base the energy pyramids must
the NPP and not GPP since
the idea these pyramids is to
the available energy in trophic
level of the chain.