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Dams during their early stages of formation are relatively barren and nutrient deficient supporting very poor aquatic life are :

  • A.Epiphytic
  • B.Parasitic
  • C.Oligotrophic
  • D.Saprophytic

Answer: C

Such newly formed reservoirs are oligotrophic.

Oligotrophic water bodies are poor in nutrients such as nitrogen and phosphorus. As a result they have low primary productivity, little plankton and sparse aquatic life, though the water is usually clear and rich in oxygen. Over time, as nutrients and sediment flow in, such a water body tends to move towards the mesotrophic and eutrophic states.

Epiphytic describes plants that grow on other plants, parasitic describes organisms that live at the expense of a host, and saprophytic describes organisms that feed on dead matter. None of them is a term for the nutrient status of a water body.

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