Answer:
20,000 kcal/m2 per year
Explanation:
Data provided in the question:
Net annual primary productivity of a particular wetland ecosystem
= 8,000 kcal/m2 per year
Respiration by the aquatic producers = 12,000 kcal/m2 per year
Now,
The gross annual primary productivity for this ecosystem will be equal to the sum of all the ecosystem and the producer in the overall ecosystem
Therefore,
gross annual primary productivity for this ecosystem
= 8,000 kcal/m2 per year + 12,000 kcal/m2 per year
= 20,000 kcal/m2 per year
