Increase in the formation of algae due to increase in nitrogen leading to decrease in dissolved oxygen in known as

Options

A. Biomagnification
B. Incineration
C. Eutrophication
D. Pneumoconiosis

Answer

**Step-by-Step Solution:**

1. **Understanding the Problem**: The question describes a phenomenon where an increase in nitrogen leads to an increase in algae formation, which subsequently decreases the dissolved oxygen levels in water bodies.

2. **Identifying Key Terms**:
- **Nitrogen**: A nutrient that can promote the growth of algae.
- **Algae**: Simple aquatic plants that can proliferate in nutrient-rich waters.
- **Dissolved Oxygen**: The amount of oxygen available in water, essential for aquatic life.

3. **Explaining the Process**:
- When nitrogen (and sometimes phosphorus) is present in excess in water bodies, it stimulates the growth of algae, a process known as algal bloom.
- These algal blooms can cover the surface of the water, blocking sunlight and affecting photosynthesis in aquatic plants.
- As algae die and decompose, the decomposition process consumes a significant amount of dissolved oxygen in the water, leading to hypoxic (low oxygen) conditions.

4. **Defining the Phenomenon**: The entire process described is known as **Eutrophication**. Eutrophication is the enrichment of water bodies with nutrients, leading to excessive growth of algae and subsequent depletion of oxygen.

5. **Selecting the Correct Answer**: Based on the explanation, the correct term that describes the increase in algae due to nitrogen leading to decreased dissolved oxygen is **Eutrophication**.

**Final Answer**: Eutrophication

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