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Which of the following statements is correct?
Eutrophication' refers to increase in domestic sewage and waste water in lakes.
Biomagnification refers to increase in concentration of the toxicant at successive trophic levels.
Presence of large amount of nutrients in water restricts 'Algal Bloom'
Algal Bloom decreases fish mortality
Answers (1)
The correct statement is:
Option 2) Biomagnification refers to an increase in the concentration of the toxicant at successive trophic levels.
Biomagnification is the process in which the concentration of certain substances, such as pollutants or toxins, increases as they move up the food chain. This phenomenon occurs because organisms at higher trophic levels consume a larger number of organisms from lower trophic levels, leading to the accumulation of the substances in their bodies.
Eutrophication (Option 1) refers to the excessive enrichment of water bodies with nutrients, typically from sources such as agricultural runoff or excessive sewage, which can lead to increased algal growth and subsequent ecosystem imbalances.
Option 3 states that the presence of large amounts of nutrients in water restricts algal bloom, which is incorrect. Algal blooms are often associated with an abundance of nutrients in the water, particularly phosphorus and nitrogen.
Option 4 suggests that algal blooms decrease fish mortality, which is also incorrect. Algal blooms can have detrimental effects on fish and other aquatic organisms due to factors such as oxygen depletion and the release of harmful algal toxins.
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