Answer:
D.20,000
Explanation:
The Gross Annual Primary Productivity for the wetland ecosystem is the amount of carbon taken up by the aquatic producers through photosynthesis.
Given that: Net Annual Primary Producer is 8,000 kcal/m2 per year, and respiration by the aquatic producers is 12,000 kcal/m2 per year, using the formula NPP = GPP – Respiration, we can determine the Gross Annual Primary Productivity of the wetland ecosystem.
NNP = 8,000 kcal/m2
Respiration = 12,000 kcal/m2
GPP = x
8,000 = x – 12,000 (NPP = GPP – Respiration)
Solve for x:
x = 8,000 + 12,000
x = 20,000 kcal/m2 per year
GPP = 20,000 kcal/m2 per year
The gross annual primary productivity for this ecosystem is 20000 kcal/m² per year.
• The rate at which solar energy is captivated in the molecules of sugar at the time of photosynthesis is known as the gross primary productivity.
Based on the given information,
• The net annual primary productivity (NPP) of the wetland ecosystem is 8000 kcal/m².
• Respiration (R) by aquatic producers is 12000 kcal/m².
Now there is a need to find the Gross primary productivity (GPP),
NPP = GPP - R
Now putting the values we get,
8000 kcal/m² = GPP - 12000 kcal/m²
GPP = 8000 + 12000 kcal/m²
GPP = 20000 kcal/m²
Thus, the gross annual primary productivity of the ecosystem is 20000 kcal/m².
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