How does eutrophication affect natural ecosystem?

Explanation

**Step-by-Step Solution:**

1. **Definition of Eutrophication:**
Eutrophication is the process where water bodies, such as lakes and rivers, become enriched with nutrients, particularly nitrogen and phosphorus. This often occurs due to runoff from agricultural land, sewage discharge, and other human activities.

2. **Nutrient Increase:**
As the concentration of nutrients increases in the aquatic environment, it leads to excessive growth of algae and microorganisms. This phenomenon is known as algal bloom.

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