Question

The phenomena in which the concentration of the toxicant increases at successive trophic levels in an ecosystem is called as

• A. Eutrophication
• B. Biomagnification
• C. Cultural eutrophication
• D. Accelerated eutrophication

Answer 1

The correct option is B Biomagnification

• Eutrophication : Eutrophication is the natural aging of a lake by biological enrichment of its water.
• Biomagnification : Biomagnification refers to increase in concentration of the toxicant at successive trophic levels. This happens because a toxic substance accumulated by an organism cannot be excreted or metabolised, and is thus passed on to the next higher trophic levels.
• Cultural or accelerated eutrophication : Cultural or accelerated eutrophication is same as that of the normal eutrophication of the lake, only difference is that in this phenomena pollutants from man’s activities like effluents from the industries and homes can radically accelerate the aging process of a lake.

Therefore. option b) Eutrophication is the correct answer.