Question

The number of malaria patients in a village increased tremendously when a large number of frogs were exported from the village. What could be the cause for it? Explain with the help of food chain.

Answer 1

As frogs were exported from the village, the mosquito population increased, because there were no frogs to consume the mosquitoes. Hence, the increased number of mosquitoes led to an increase in the number of malaria patients.

Let us consider the food chain -

$Phytoplankton⟶Zooplankton⟶Mosquito⟶Larvae⟶Frogs$

In the absence of frog the mosquito larvae survives which gives rise in the population of mosquito which increases the incidence of malaria.