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Rachana
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Asked: 2020-11-22T11:50:39+00:00 In:

Why does the increased level of nutrients in the water affect the survival of aquatic organisms?

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NCERT Solutions for Class 8 Science Chapter 18
Important NCERT Questions
8th Chapter 18 Pollution of Air and Water
NCERT Books for Session 2022-2023
CBSE Board and State Board
Questions No: 11

2020-2021cbsechapter 18class 8 scienceclass8ncertpollution of air and waterscience
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      Excessive quantities of chemicals (fertilizers, weedicides, pesticides etc.) washed from the fields enter into ponds. These act as nutrients for algae to flourish. Once these algae die, they serve as food for decomposers like bacteria. In this process a lot of oxygen in these ponds gets used up. This results in a decrease in the oxygen level, which kills aquatic organisms.

      https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-18/

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      1. The increased level of nutrient in water helps the algae to grow rapidly and when the algae die, they serve as food for decomposers like bacteria. A lot of oxygen in water gets used up. This results in a decrease in the oxygen level in water and in that way the survival of aquatic organisms are affected. 👍

      Good luck for exam👍

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    3. Excessive quantities of chemicals (fertilizers, weedicides, pesticides etc.) washed from the fields enter into ponds. These act as nutrients for algae to flourish. Once these algae die, they serve as food for decomposers like bacteria. In this process a lot of oxygen in these ponds gets used up. This results in a decrease in the oxygen level, which kills aquatic organisms.This process is caled electrophication

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