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Fish mortality increases with influx of ...

Fish mortality increases with influx of nutrients in a fresh-water body' write two reasons. How will the influx of nutrients affect the BOD level of this water body?

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### Step-by-Step Solution: 1. **Understanding Nutrient Influx**: The influx of nutrients, such as nitrogen and phosphorus from agricultural runoff and detergents, leads to an increase in nutrient levels in freshwater bodies. 2. **Eutrophication**: This nutrient enrichment causes a phenomenon known as eutrophication. Eutrophication stimulates excessive growth of algae (algal blooms) in the water body. 3. **Oxygen Depletion**: As the algae grow and eventually die, their decomposition requires a significant amount of oxygen. This process is carried out by bacteria, which consume oxygen while breaking down the organic matter. ...
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