The number of trophic levels in an ecosystem are limited. Comment.
Number of trophic levels are limited in ecosystem and are not more than $4$ or $5 .$ Because the energy flow decreases at successive level.
Therefore remaining energy is used in Biotic processes to maintain respiration and maintain life. If the number of trophic level are more then remaining energy decreases therefore at second trophic level cannot support in the form of energy flow. Therefore food chain remains limited upto $4$ to $5$ trophic level.
E.g.,
$\begin{array}{lllll}\text { Sunlight } & \frac{1 \% \text { is }}{\text { absorbed }} & \text { Plants } \frac{10 \% \text { is }}{\text { transformed }} & \text { deer } \frac{10 \% \text { gets }}{\text { converted }} & \text { Tiger } \\ (30,000 \mathrm{~J}) & (300 \mathrm{~J}) & (30 \mathrm{~J}) & (3 \mathrm{~J})\end{array}$
Which must be preserved in an ecosystem, if the system is to be maintained
Distinguish between
$(a)$ Litter and detritus
$(b)$ Primary and secondary productivity
Consider the following four statements $(A-D)$ and select the correct option stating which ones are true $(T)$ and
which ones are false $(F)$.
Statements :
$(A)$ Vertical distribution of different species occupying different levels in a community is called stratification.
$(B)$ Net primary productivity minus respiration losses is the gross primary productivity.
$(C)$ Rate of biomass production is called decomposition
$(D)$ Annual net primary productivity of oceans is $55$ billion tons
(A) | (B) | (C) | (D) |
The biotic part of ecosystem includes