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Q.
Extinction of a species in a food chain is compensated by
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Solution:
As a matter of fact the food chains are not isolated sequences but are interconnected with one another. For example, man and many other organisms are at the same time herbivore and carnivore and hence occupy different trophic levels in the food chain. There may be several carnivores also with overlapping prey types. This trophic . relationship between organisms of an ecosystem is not always in a simple chain-like fashion but forms a complicated network. Furthermore, different types of food chains interact upon each other. This interlocking pattern of several food chains is known as food web. Thus food web may be defined as the relationship in which a predator eats several types of food and every kind of food is eaten by many different organisms and is the outcome of the interaction between different types of food chains. Thus if a certain species in a food chain is extinct, the predator can depend upon another species in the same trophic level for food.