Question

the net annual primary productivity of a particular wetland ecosystem is found to be 6,000 kcal/m²/yr. if respiration by the aquatic producers is 10,000 kcal/m²/yr, what is the gross annual primary productivity for this ecosystem, in kcal/m²/yr?
4,000 kcal/m²/yr
6,000 kcal/m²/yr
10,000 kcal/m²/yr
16,000 kcal/m²/yr

Explanation:

Step1: Recall formula

Gross Primary Productivity (GPP) = Net Primary Productivity (NPP)+ Respiration (R)

Step2: Substitute values

GPP = 6000 + 4000

Answer:

10,000 kcal/m²/yr