Describe ecological effects of drainage of nitrate fertilizers into rivers and streams.

  • Accumulation of nitrates in the streams (eutrophication) encourages proliferation of protists and algae on the surface of water.
  • When the algae die, bacterial decomposers use up a lot of oxygen for decomposition and reduce amount of dissolved oxygen in water
  • Reduction in amount of oxygen in water leads to death of fish and animals
  • Light penetration reduces and this lead to death of aquatic plants.
  • Bad odor and taste of water
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