Which one of the following is not a gaseous biogeochemical cycle in ecosystem?

Options

A. Water cycle
B. Phosphorus cycle
C. Nitrogen cycle
D. Carbon cycle

Answer

To determine which of the following options is not a gaseous biogeochemical cycle in the ecosystem, we need to understand the two main types of biogeochemical cycles: gaseous and sedimentary.

### Step-by-Step Solution:

1. **Understand Biogeochemical Cycles**:
- Biogeochemical cycles are processes that recycle nutrients in various chemical forms from the environment to organisms and back to the environment.
- These cycles are generally classified into two categories: gaseous cycles and sedimentary cycles.

2. **Identify Gaseous Biogeochemical Cycles**:
- Gaseous cycles involve the movement of elements in their gaseous forms. Common examples include:
- **Nitrogen Cycle**: Involves nitrogen in various forms (N2, NH3, NO3).
- **Carbon Cycle**: Involves carbon in forms like CO2 and organic compounds.
- **Water Cycle**: Involves water vapor and precipitation.
- **Oxygen Cycle**: Involves oxygen in gaseous form (O2).

3. **Identify Sedimentary Biogeochemical Cycles**:
- Sedimentary cycles involve the movement of elements that are primarily found in solid forms in the earth's crust. Examples include:
- **Phosphorus Cycle**: Involves phosphorus found in rocks and soil.
- **Calcium Cycle**: Involves calcium primarily in solid forms.
- **Sulfur Cycle**: Involves sulfur in various forms, but primarily in sedimentary deposits.

4. **Analyze the Options**:
- Review the provided options to identify which one does not belong to the gaseous biogeochemical cycles.
- If the options include elements like nitrogen, carbon, water, and phosphorus:
- Nitrogen, carbon, and water are part of gaseous cycles.
- Phosphorus is part of the sedimentary cycle.

5. **Conclusion**:
- Based on the analysis, the correct answer is **phosphorus**, as it is not a gaseous biogeochemical cycle but rather a sedimentary cycle.

### Final Answer:
Phosphorus is not a gaseous biogeochemical cycle in the ecosystem.

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