Mr. $X $ is eating curd/yoghurt. For this food intake in a food chain he should be considered as occupying
First trophic level
Second trophic level
Third trophic level
Fourth trophic level
$A$ : Detrivores and decomposers hold up a part of nutrients contained in detritus.
$R$ : Immobilised nutrients cannot be available for solubilisation after the death of saprotrophs.
Transfer of material and energy from one ecosystem to other ecosystem is best examplified by
Definitions / Explanation :
$(i)$ Saprotrophs
$(ii)$ Trophic level
In an ecosystem
What is the ultimate source of energy for the ecosystems ?