A lake which is rich in organic waste may result in:
Correct answer: A. Increased population of aquatic organisms due to minerals.
- A. Increased population of aquatic organisms due to minerals.
- B. Drying of the lake due to algal bloom.
- C. Increased population of fish due to lots of nutrients.
- D. Mortality of fish due to lack of oxygen.
Explanation
High amount of organic waste in a lake will trigger and activate decomposer microbes which will decompose organic waste. Biochemical Oxygen Demand (BOD) of this lake will shoot up and decomposers will utilize most of the dissolved oxygen present in lake. Consequently, the level of dissolved oxygen will go down to alarming extent. Aquatic animals like fish which totally depend on the oxygen dissolved in water will ultimately die.
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