The net primary productivity (NPP) of an ecosystem is 25 kg…
The net primary productivity (NPP) of an ecosystem is 25 kg C/m2/year, and the energy needed by the producers for their own respiration is 30 kg C/m2/year. The gross primary productivity (GPP) of such an ecosystem would be… (kilograms of carbon serves as a proxy for kcal in this case) 5 kg C/m2/year. c) 25 kg C/m2/year.. 10 kg C/m2/year. d) 55 kg C/m2/year.