An inverted pyramid of biomass can be found in which ecosystem?

Options

A. Forest
B. marine
C. Gras land
D. Tundra

Explanation

### Step-by-Step Solution:

1. **Understanding the Concept of Pyramid of Biomass**:
- A pyramid of biomass represents the total mass of living organisms at each trophic level in an ecosystem. Typically, it is shaped like a pyramid, with producers at the base and top predators at the apex.

2. **Identifying the Inverted Pyramid**:
- An inverted pyramid of biomass occurs when the biomass of higher trophic levels exceeds that of lower trophic levels. This is contrary to the typical pyramid shape.

3. **Analyzing Ecosystem Types**:
- The question provides four ecosystem options: forest, marine, grassland, and tundra. We need to determine which of these can exhibit an inverted pyramid of biomass.

4. **Focusing on Aquatic Ecosystems**:
- In aquatic ecosystems, such as marine environments, the biomass of fish (higher trophic levels) can exceed that of phytoplankton (lower trophic levels). This leads to an inverted pyramid of biomass.

5. **Comparing with Terrestrial Ecosystems**:
- In contrast, terrestrial ecosystems like forests, grasslands, and tundra typically have a regular pyramid of biomass, where the biomass decreases from producers to top consumers.

6. **Conclusion**:
- Based on the analysis, the only ecosystem where an inverted pyramid of biomass can be found is the marine ecosystem.

### Final Answer:
The inverted pyramid of biomass can be found in the **marine ecosystem** (Option 2).

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