Question

consider the following food chain which occurs in a forest: grass -> deer -> lion if 100 j of solar energy is available to the grass, how much energy would be available to the deer to transfer it to the lion?​

Answer 1

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According to Ten percent law given by Lindeman, during the transfer of energy from one trophic level to another, only 10% is transferred to the next level.

Rest of the energy is used by the organism in several processes like respiration, movement, digestion etc.

Given Food chain:

• Grass ➤ Deer ➤ Lion

The total amount of energy available to the grass is 100 J. Grass is the first trophic lever and the producer in the food chain. Amount of energy available for the next level i.e. for deer is:

⇒ 10% of 100 Joules

⇒ 10/100 × 100 Joules

⇒ 10 Joules

$\therefore$Deer will receive only 10 Joules of energy.

Now it is the turn of tiger which is the next trophic level in the food chain. Amount of energy available for them is:

⇒ 10% of 10 Joules

⇒ 10/100 × 10 Joules

⇒ 1 Joule

$\therefore$Tiger will receive only 1 Joule of energy.

Answer 2

Answer:

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According to Ten percent law given by Lindeman, during the transfer of energy from one trophic level to another, only 10% is transferred to the next level.

• Rest of the energy is used by the organism in several processes like respiration, movement, digestion etc.

$\huge { \boxed{ \underline{ \sf{ \orange{✯Given\: food \: chain✧:-}}}}}$

• Grass ➤ Deer ➤ Lion

The total amount of energy available to the grass is 100 J. Grass is the first trophic lever and the producer in the food chain. Amount of energy available for the next level i.e. for deer is:

⇒ 10% of 100 Joules

⇒ 10/100 × 100 Joules

⇒ 10 Joules

• ∴ Deer will receive only 10 Joules of energy.

• Now it is the turn of tiger which is the next trophic level in the food chain. Amount of energy available for them is:

⇒ 10% of 10 Joules

⇒ 10/100 × 10 Joules

⇒ 1 Joule

• ∴ Tiger will receive only 1 Joule of energy.