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How has DDT caused decline in bird popul...

How has DDT caused decline in bird population ?

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### Step-by-Step Solution: 1. **Understanding DDT**: - DDT (Dichloro-Diphenyl-Trichloroethane) is a synthetic pesticide that was widely used in agriculture to control pests. It is known for its effectiveness but also for its environmental persistence. **Hint**: DDT is a chemical compound used primarily as a pesticide. 2. **Toxicity and Non-biodegradability**: ...
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Assertion: Biomagnification of DDT can enhance the decline in bird population. Reason: DDT causes thinning of egg shell and their premature breaking by disturbing calcium metabolism.

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DDT contant in the water of a lake that supplies drinking water to the nearby villages, is found to be 0.003 ppm. The kingfishers of that area reported to have 2 ppm of DDT. Why has the concentration increased in these birds ? What harm will this cause to the bird population ? Name the phenomenon.

Among the following which causes the increase in population density?

(a) What depletes ozone in the stratosphere? How does this affect human life? (b) Explain biomagnification of DDT in an aquatic food chain. How does it affect the bird population?

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In an area where DDT had been used extensively, the population of birds declined significantly because:

In an area where DDT had been used extensively, the population of birds declined significantly because: