Question

if a terrestrial ecosystem has a gross primary production of 4,500 kcal/m²/yr and a cellular respiration rate of 2,500 kcal/m²/yr, what is the net primary production for this ecosystem? 200 kcal/m²/yr 250 kcal/m²/yr 2,000 kcal/m²/yr 7,000 kcal/m²/yr

Explanation:

Step1: Recall the net - primary - production formula

Net primary production (NPP) = Gross primary production (GPP)-Cellular respiration (R)

Step2: Substitute the given values

Given GPP = 4500 kcal/m²/yr and R = 2500 kcal/m²/yr.
NPP=4500 - 2500

Step3: Calculate the result

NPP = 2000 kcal/m²/yr

Answer:

2000 kcal/m²/yr