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How does eutrophication contribute to the aging of a lake?

ABy increasing water temperature

BBy reducing the growth of aquatic organisms

CBy reducing nutrient content in water

DBy causing depletion of dissolved oxygen

Answer:

D. By causing depletion of dissolved oxygen

Read Explanation:

Eutrophication

  • Eutrophication is the process by which a body of water, such as a lake or pond, becomes enriched with nutrients, particularly phosphorus and nitrogen.
  • This enrichment leads to an excessive growth of algae and other aquatic plants.

The increased plant growth can result in several negative effects on the water body including :

Algal Blooms:

  • The overabundance of nutrients stimulates the rapid growth of algae.
  • This can lead to the formation of algal blooms, where large populations of algae accumulate on the water's surface.

Reduced Oxygen Levels:

  • As the algae and other plants die and decompose, bacteria break down the organic matter.
  • This process consumes oxygen from the water.
  • In areas with intense algal growth, the demand for oxygen can exceed the supply, leading to reduced oxygen levels in the water.
  • Low oxygen levels can be harmful to fish and other aquatic organisms.
  • The altered nutrient levels and oxygen concentrations can favor certain species of plants and animals over others, leading to changes in the overall composition of the aquatic ecosystem.
  • Thus,Eutrophication can contribute to a decline in biodiversity as some species may thrive in nutrient-rich conditions while others are negatively impacted.

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