Suppose that the net primary productivity of a particular ecosystem is 80 units per year. The respiration rate of primary producers is 30 units per year, and the respiration rate of herbivores is 10 units per year. The gross primary productivity is _______ units per year.
A) 40
B) 50
C) 70
D) 110

Question

Quizplus · Accepted Answer

Gross primary productivity (GPP) is the sum of net primary productivity (NPP) and the respiration rate of primary producers. Therefore, GPP = NPP + Respiration of primary producers = 80 + 30 = 110 units per year.

Suppose That the Net Primary Productivity of a Particular Ecosystem