Which of the following statements does not apply to eutrophication?

It is the natural aging of a lake by nutrient enrichment of its water

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In a young lake, the water is cold and clear and supports less life

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The nutrients such as sulphur and phosphorus encourage the growth of aquatic organisms in the lake

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Pollutants released by man radically accelerate the aging process of a lake.

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Overgrowth of algae leads to scum that depletes the level of dissolved oxygen in water

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Solution

The correct option is D Pollutants released by man radically accelerate the aging process of a lake.
Out of the statements given, the statement, "Pollutants released by man radically accelerate the aging process of a lake." does not apply to eutrophication.
Eutrophication is the process of natural ageing of lakes by biological enrichment of its water. In a young lake, the water is clear, supporting little life. With time, due to the presence of nutrients such as nitrogen and phosphorus, there occurs a growth of microorganisms, which deteriorates the water quality.
Pollutants released by man radically accelerate the aging process of a lake and this addition is not a natural process even though it leads to eutrophication. All the other options imply natural eutrophication.

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Similar questions

Q. Which of the following statements regarding eutrophication are correct ?
(i) Eutrophication is the natural ageing of a lake by nutrient enrichment of its water.
(ii) Pollutants from human activities like effluents from the industries and homes can radically accelerate the aging process of a lake. This phenomenon is called as cultural or accelerated eutrophication.
(iii) The plant nutrients responsible for eutrophication are nitrates and phosphates.
(iv) These phosphates and nitrates accelerate the growth of algae, which utilise oxygen and may deoxygenate the water to kill the fish and other aquatic animals.

Q. Justify the statement 'Natural aging of a lake by nutrient enrichment of its water'.

Q. Natural aging of a lake by nutrient enrichment of its water

What is the biological term for the process by which a water body becomes rich in dissolved nutrients, thereby stimulating the growth of aquatic life and ending in the depletion of dissolved oxygen in the water body?

Q. We all have seen water bodies, the water is generally clear but at places, the surface of water can be seen covered by green plants, known as Algae. The algae grows on the water surface because of the nutrients in the water body, how does this affect the life of the aquatic organisms?

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