Question

Given above is a figure, based on which the following questions are given. Answer them.

(i) What ecological phenomenon has been depicted in the figure ? Define it.

(ii) Select and name some organisms and use them to prepare a food chain with four

trophic levels.

(iii) State the terms for the trophic levels, naming the components of the constructed
food chain.
(iv) What happens to the energy flow through
the constructed food chain ? Who gets the least energy and why ?

(v) Name the principal source of energy for any ecosystem. Is it a renewable or a
non-renewable source, and why ?

Answer 1

1)Here food web has been depicted
2)A food chain with four tropic level
grass->rabbit ->fox->lion
For aquatic medium
Plants ->zooplanktons->fish->Heron ->lion
3) the names for terrestrial medium
producer -primary consumer -secondary consumer -decomposer
But here is no decomposers in the picture

In aquatic medium this is the same
4) enery flow is lost by 10% from going to one to another trophic level
Lindemann's law
5)Principal source of energy is got from food ultimately from sun

As green plants produce foods in presence of sun light
It is non renewable as the energy gets transferred from one to another trophic level
but the source of energy is renewable as Sun light is available till the destruction of earth and plants are renewable if plantation occurs timely