NEET Botany (general) MCQ Question
If the net primary productivity (NPP) of an ecosystem is 500 kcal m - 2 yr - 1 and the gross primary productivity (GPP) is 800 kcal m - 2 yr - 1, what is the respiration loss (R) of the plants in this ecosystem?
300 kcal m - 2 yr - 1
500 kcal m - 2 yr - 1
1300 kcal m - 2 yr - 1
800 kcal m - 2 yr - 1
Correct Answer
Detailed Explanation
The respiration loss (R) can be calculated using the formula GPP - R = NPP. Rearranging gives R = GPP - NPP = 800 - 500 = 300 kcal m - 2 yr - 1.
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