For NPP, energy captured is

Options

A. `1-5%` of incident rediation
B. `2-5%` of PAR
C. `0.8-4%` of incident radiation
D. `2-10%` of PAR

Answer

To solve the question regarding the energy captured for Net Primary Productivity (NPP), we can follow these steps:

### Step-by-Step Solution:

1. **Understand NPP**: NPP stands for Net Primary Productivity. It refers to the amount of organic matter (or energy) that is produced by plants after accounting for the energy they use for respiration.

2. **Differentiate between GPP and NPP**:
- Gross Primary Productivity (GPP) is the total amount of organic matter produced by photosynthesis.
- NPP is calculated by subtracting the energy used for respiration (R) from GPP. The formula is:
\[ NPP = GPP - R \]

3. **Identify the role of photosynthetically active radiation (PAR)**:
- PAR refers to the portion of solar radiation that plants can use for photosynthesis. It is crucial for understanding how much energy is available for the process of photosynthesis.
- It is noted that only about 2 to 10% of solar radiation is utilized in photosynthesis.

4. **Conclude the energy captured for NPP**:
- Based on the information provided, the energy captured for NPP, which is derived from the photosynthetically active radiation, is approximately 2 to 10% of the total solar radiation.

### Final Answer:
The energy captured for NPP is approximately **2 to 10%** of the total solar radiation.

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