Question

Q10 (a) Name and state the law given by Lindeman which tells us how much energy entering a particular trophic level of organisms is available for transfer to the next higher trophic level.
(b) How much energy will be available to hawks in the food chain comprising hawk , snake, paddy, and mice, if 10000 J of energy is available to paddy from the sun.

Answer 1

(a)10% energy transfer to the next higher trophic level.
(b)energy -1)paddy-10000J
2)mice-1000J
3)snake-100J
4)hawk-10J

Answer 2

Answer:

(a) 10% LAW

    The energy available at each successive tropic level is 10% of the previous           level . This is known as 10 % law.

(b)Food chain will be = Paddy—Mice—Snake—Hawk

⇒10,000J of energy is available to paddy from sun, out of which only 1% is              absorbed, 1% of 10,000J is 100J. 100J energy is absorbed by Paddy.

⇒ 10% of this 100J is transferred to mice, 10% of 100J is 10J ; mice receives 10J energy.

⇒ 10% of 10J i.e. 1% reaches the next trophic level i.e. snake.

⇒Snake will transfer 10% of 1J to hawks; 10% of 1J is 0.1J.

Thus, 0.1J of energy will be available to hawks in the given food chain.