Q. 36 B5.0( 3 Votes )

Consider the following food chains:

(i) Plants Mice Snakes Hawks

(ii) Plants Mice Hawks

If energy available at the producer level in both the food chains is 100 J, in which case will hawks get more energy as food and by how much? Justify your answer.

Answer :

i) Plants—Mice—Snakes—Hawks.

If 100J is available at producer level (plants); mice will receive 10% of it- 10J.

10% of energy transfer will take from mice to snakes. 10% of 10J=1J. Snake will receive 1J of energy.

10% of energy will be transferred from snake to hawks. 10% of 1J=0.1J. Hawk will receive 0.1J of energy in this food chain.

ii) Plants—Mice—Hawks.

If 100J is available at producer level (plants); mice will receive 10% of it-10J

10% of 10J energy will be transferred from mice to hawks. 10% of 10J=1J.

The Hawks will receive 1J energy in this food chain.

Therefore, hawks will get more energy in the food chain which is equal to 1J and is more than 10% than the energy it is receiving in the first food chain. This is because in the first food chain Mice were being eaten by snakes, and hawks had to eat snakes, so it received less energy. In the second food chain, hawks directly ate mice, there were no snakes to consume energy in between so hawks received more energy.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Champ Quiz | Ecosystem and its components42 mins
Ecological Pyramid47 mins
Quiz | Ecological Pyramid42 mins
Genius Quiz | About Ecosystem44 mins
How our Digestive System works?42 mins
Let's explore our planet, Earth35 mins
Electricity, Our Lifeline48 mins
Are We Enemy to Environment?39 mins
We can't make our food!44 mins
Quiz on How Do Acids and Bases Affect Our Daily Lives?!30 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses