The energy stored by a community over a specific period a time is called its

Options

A. Gross productivity
B. Net productivity
C. Pyramid of energy
D. Primary productivity

Answer

**Step-by-Step Solution:**

1. **Understanding the Concept of Energy in Ecosystems**:
- In an ecosystem, energy is captured and stored by organisms, primarily through the process of photosynthesis in plants.

2. **Defining Gross Productivity**:
- Gross productivity refers to the total amount of energy captured by plants (producers) in a given time period. This includes all the energy that is produced before any losses are accounted for.

3. **Defining Net Productivity**:
- Net productivity is the amount of energy that remains after accounting for the energy lost through respiration by the producers. It is calculated by subtracting the respiratory losses from the gross productivity.

4. **Identifying the Correct Term**:
- The question asks for the energy stored by a community over a specific period of time. This is best represented by net productivity, as it reflects the actual energy available for growth and reproduction after accounting for the energy used in respiration.

5. **Conclusion**:
- Therefore, the energy stored by a community over a specific period of time is called **Net Productivity**.

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