Question

Describe different types of food chain and give its significance.

Answer 1

1. Grazing food chain:

This type of food chain starts from the living green plants goes to grazing herbivores, and on to carnivores. Ecosystems with such type of food chain are directly dependent on an influx of solar radiation.

phytoplanktons →zooplanktons →Fish sequence or the grasses →rabbit →Fox sequences are the examples, of grazing food chain.


2. Detritus food chain

This type of food chain goes from dead organic matter into mi­croorganisms and then to organisms feeding on detritus (detrivores) and their predators. Such ecosystems are thus less dependent on direct solar energy. These depend chiefly on the influx of organic matter produced in another system. 





Significance of food chain:

1. The studies of food chain help understand the feeding relationship and the interaction between organisms in any ecosystem.

2. They also help us to appreciate the energy flow mechanism and matter circulation in ecosystem and understand the movement of toxic substances in the ecosystem.

3. The study of food chain helps us to understand the problems of bio-magnifications.

Answer 2

1. Grazing food chain:

This type of food chain starts from the living green plants goes to grazing herbivores, and on to carnivores. Ecosystems with such type of food chain are directly dependent on an influx of solar radiation.

2. Detritus food chain:

This type of food chain goes from dead organic matter into mi­croorganisms and then to organisms feeding on detritus (detrivores) and their predators. Such ecosystems are thus less dependent on direct solar energy. These depend chiefly on the influx of organic matter produced in another system.

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