Food Chain

20 01 2012

Animals can be categorized into three classes according to the food they eat. Herbivores eat plants, carnivores eat animals, and omnivores eat plants and animals. Examples of herbivores are goats, cows and butterflies.

Goat

Cows

Butterflies

Examples of carnivores are tigers, eagles and pythons.

Tigers

Eagles

Pythons

Examples 0f omnivores are squirrels, chickens and bears.

Squirrels

Chickens

Bears

In a habitat, plants are producers because they produce their own food, while animals are consumers because they get their food by eating other organisms. These producers and consumers depend on each other for food. Therefore, this relationship forms food chains. A food chain can be arranged in a linear manner and represented as:

producer –> primary consumer –> secondary consumer

Examples of food chains:

cabbage –> worm –> bird

tapioca leaves –> goat –> python

pond weed –> tadpole –> guppy –> tilapia

Energy is transferred from one organism to the next organism in a food chain. Some energy is lost to the surrounding when the transfer of energy is taking place. The lost is due to the process of respiration and excretion. Thus, less energy is transferred to the next organism in the food chain.


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