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Select the correct relationship from the...

Select the correct relationship from the following.
(a) GPP = NPP - R
(b) GPP = NPP + R
(c) NPP = GPP + R
(d) NPP - GPP = R

A

GPP = NPP - R

B

GPP = NPP + R

C

NPP = GPP + R

D

NPP - GPP = R

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to understand the definitions of Gross Primary Productivity (GPP) and Net Primary Productivity (NPP) and how they relate to each other. ### Step-by-Step Solution: 1. **Define GPP and NPP:** - **GPP (Gross Primary Productivity)** is the total rate of photosynthesis in a given area. It represents the total amount of organic matter produced by plants. - **NPP (Net Primary Productivity)** is the amount of organic matter that remains after the plants have used some of the GPP for their own respiration. 2. **Understand the relationship between GPP, NPP, and respiration (R):** - The relationship can be expressed mathematically as: \[ NPP = GPP - R \] - Here, \( R \) represents the respiration of the plants. 3. **Rearranging the equation:** - If we rearrange the equation \( NPP = GPP - R \), we can express GPP in terms of NPP and R: \[ GPP = NPP + R \] 4. **Evaluate the options:** - Now we can evaluate the given options: - (a) GPP = NPP - R (Incorrect) - (b) GPP = NPP + R (Correct) - (c) NPP = GPP + R (Incorrect) - (d) NPP - GPP = R (Incorrect) 5. **Conclusion:** - The correct relationship is given by option (b): **GPP = NPP + R**. ### Final Answer: **(b) GPP = NPP + R**
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Primary Productivity (GPP and NPP)