In a terrestial ecosystem such as forest, maximum energy is in which trophic level
$T_1$
$T_2$
$T_3$
$T_4$
Primary producer of an ecosystem is
What is primary productivity? Give brief description of factors that affect primary productivity.
Distinguish between
$(a)$ Litter and detritus
$(b)$ Primary and secondary productivity
The planktonic forms are
Food levels in an ecosystem are called