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Discussion :: Hydrosphere

  1. With reference to a fresh water lake, consider the following characteristics:
    1. Richness in nutrients
    2. Rapid turnover of phytoplankton
    3. Depletion of dissolved oxygen
    Which of the above is/are observed in a lake after its eutrophication?

    2. A.

     1 only
    B.

     1 and 2 only
    C.

     3 only
    D.

     1, 2 and 3

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    Answer : Option C

    Explanation :

    Depletion of dissolved oxygen is observed in a lake after its eutrophication. Eutrophication is the process by which a body of water becomes enriched in dissolved nutrients (as phosphates), stimulating the growth of aquatic plant life usually resulting in the depletion of dissolved oxygen.

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