Topic Content:
Food Chain:
Food chain can be defined as a linear feeding relationship among organisms in a community.
A food chain shows the transfer of energy and nutrients from one organism to the other, in a feeding pathway. A food chain always starts with a producer, for example;
| Producer: | Primary Consumer: | Secondary Consumer: | Tertiary Consumer: | ||||
| 1. | Grass: | → | Grasshopper: | → | Lizard: | → | Snake: |
| 2. | Algae: | → | Shrimp: | → | Fish: | → | Man: |
Food Web:
Numerous food chains are present in an ecosystem, and these food chains can be linked together in a food web. Food web can therefore be defined as a set of food chains.
An example of a food web is illustrated below:
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