Food web is a network of food chains which are interconnected at various trophic levels so as to form a number of feeding connections amongst members of a biotic community. Food chain is a linear sequence of organisms through which food and its contained energy passes, with earlier member of the sequence becoming food of the later member of the sequence. A secluded food chain is always at a risk of being damaged with a major effect on the ecosystem as well. Suppose tiger population increases. Its prey population of say deer will decrease rapidly resulting in the nonavailability of food to tigers, their starvation and hence death. However, in a food web, each predator has a choice to feed on different types of preys. Reduction in population of one type of prey will not affect the predator because it can switch over to postulate on some other animals. Meanwhile, the population of preferred prey recovers.

The concept of food web or non-dependence on a single source can help us in case of adversity.

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