Food Chain

S.G.A.D.Govt.Girls.Sec.School (TT) Prepared by: - Mrs.Daljit Kaur Guided by: - Raman Kumar

Food Chain The complex energy relationship between plants and animals often illustrate as a pyramid. The sun is the original source of energy in virtually all ecosystems .Green plants are called producers because they convert energy of sun light into carbohydrate through the process of photosynthesis.90% energy contain in the food an animals eats is used for the animals movements, growth and repair

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tissue, or is lost as heat or in waste product just 10% chemical energy in the food remains in the animal to be passed on the next level of pyramid. When primary consumers (herbivores) eat the producers, the energy changes into a form that can be stored in animal cells. Secondary consumers (carnivores) transform the energy once again. Decomposers may occupy several positions in the pyramid, both receiving energy from decaying plants and animals and supplying it to detrivores and fungus-eaters. With less energy available at the top of pyramid than at the base. ⇒ Green plants, the primary producers of food in most terrestrial food webs ⇒ Herbivores, consumers of green plants ⇒ Carnivores, predators feeding upon the herbivores ⇒ Omnivores, consumers of both plants and animals ⇒ Secondary carnivores, which are predators that feed on predators, It make complete food chain. For example, the fungi that decompose matter in a detrital web may sprout mushrooms that are consumed by squirrels, mice, and deer in a grazing web. Robins are omnivores, that is, consumers of both plants and animals, and thus are in both detrital and grazing webs. Robins typically feed on earthworms, which are detritivores that feed upon decaying leaves. References:- Microsoft Encarta Encyclopedia.