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Q.

If a forest's GPP is 10,000 kcal/m²/yr, and the respiratory loss (R) of producers is 2,000 kcal/m²/yr, then the Net Primary Productivity (NPP) would be 

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a

2,000 kcal/m²/yr

b

8,000 kcal/m²/yr

c

10,000 kcal/m²/yr

d

12,000 kcal/m²/yr

answer is A.

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Detailed Solution

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To calculate Net Primary Productivity (NPP), use the formula:

NPP=GPP−R

Substitute the given values:

NPP = 10,000  kcal/m²/yr − 2,000 kcal/m²/yr
=8,000 kcal/m²/yr−2,000 kcal/m²/yr

Therefore, the Net Primary Productivity (NPP) is 8,000 kcal/m²/yr.

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