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Thread: contrast in the lake

  1. #1 contrast in the lake 
    New Member
    Join Date
    Jun 2006
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    2
    I read that oligotrophic lakes are generally oxygen-rich but nutrient-poor, and eutrophic lakes are oxygen-poor but nutrient-rich. Why do oxygen and nutrient contrast each other?


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  3. #2  
    Forum Ph.D.
    Join Date
    Feb 2005
    Location
    Dublin, Ireland
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    By overloading the water, with nutrients, eutrophication occurs.

    With the water rich in nitrates and phosphates, algae blooms occur, large populations cause an unbalance and as they use all the nutrients, they die off.

    Bacteria then decay the algae remains, which puts a demand on the oxygen supply.

    That’s how I learned it...

    Hope it’s what you’re looking for.


    Stumble on through life.
    Feel free to correct any false information, which unknown to me, may be included in my posts. (also - let this be a disclaimer)
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