Given below are two statements:

Statement I: Turbulent and rapidly flowing waters are generally depleted in oxygen.

Statement II: Adding organic materials, such as sewage or paper pulp, to water stimulates activity and oxygen consumption by decomposers.

In the light of the above statements, choose the correct answer from the options given below:

Important Points

Statement I: Turbulent and rapidly flowing waters are generally depleted in oxygen.

• Turbulent and rapidly flowing waters can actually be highly oxygenated.
• This is because the turbulent flow allows for greater mixing with the air and helps to increase the amount of oxygen in the water.
• In addition, the movement of water over rocks and other structures can help to aerate the water and increase oxygen levels.

Hence, this statement is incorrect.

Statement II: Adding organic materials, such as sewage or paper pulp, to water stimulates activity and oxygen consumption by decomposers.

• When organic materials are added to water, they provide a food source for decomposers such as bacteria and fungi.
• These organisms consume the organic materials, and, in the process, they use up oxygen.
• As the oxygen is depleted, other organisms in the water that require oxygen can become stressed or die.
• This is why adding organic materials to water can lead to a decrease in oxygen levels and can have negative impacts on aquatic ecosystems.

Hence, this statement is correct.

Hence, Statement I is Incorrect but Statement II is Correct.