Question

11.
Why does the increased level of nutrients in the water affect the survival
of aquatic organisms?
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Answer 1

Answer:

In this process a lot of oxygen in water gets used up. This results in a decrease in the oxygen level for the aquatic organisms.

Hope this answer is helpful for you.

Answer 2

Answer:

on an increased level of nutrients oxygen starts decreasing and nitrogen compound starts increasing . So when oxygen is not there aquatic organisms die