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What Are Ecological Pyramids

Represent a f...

Question

Represent a forest food chain with the help of flow chart. Also find out the amount of energy available at the third trophic level, if plants absorb $1000$ kilo joules of energy from the sun.

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Solution

According to 10% law of tropic level, each trophic level will get 10% of energy from its previous trophic level. So, if a plant has a NET of 1000 KJ of energy then 100KJ of energy will transfer to the next level.

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Q. What amount of energy will be available to the organisms of the

2^{n d}

trophic level of a food chain, if the energy available at the first trophic level is 10,000 joules?

Q. If 5 joules of energy is available at producer level (plants), then how much energy will be transferred to the lion in the following food chain?
Plants → Goat → Lion

Q. A forest ecosystem having a lot of green plants has some foxes, lions and rabbits in it.
(a) Write a food chain comprising all the four organisms mentioned above.
(b) Name (i) one herbivore, and (ii) two carnivores, in this food chain.
(c) Name the link which is a predator as well as a prey.
(d) Name (i) second trophic level, and (ii) third trophic level.
(e) Which link of this food chain can feed on second trophic level as well as third trophic level, independently?
(f) If the sun provides 1000 J of energy to the plants, then how much energy will be transferred to fox through the food chain.

Q. Read the following statements.
I. In a food chain, there is a multidirectional flow of energy from the sun to producers, consumers, and decomposers.
II. Shorter food chains provide more energy as compared to longer food chains.
III. In an ecosystem, no food chain is independent.
IV. The energy available at each successive trophic level increases.
Which of these statements are correct?

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