What are trophic levels ? Why are autotrophs considered to be at the first trophic level of all food chains…
What are trophic levels ? Why are autotrophs considered to be at the first trophic level of all food chains ? State the reason for limited number of trophic levels in nature.
Solution
Every step or level of the food chain forms a trophic level.
Autotrophs are the green plants, which are the only organisms which can fix up the solar energy and make it available for heterotrophs or the consumers.
Very little amount of energy is available to the last trophic level as energy is lost at every level to the environment.