Trophic levels

Trophic levels
(Trophe = Nourishment = Food)

Trophic levels are represent the position which organism occupies in a food chain, and are interaction deals with how the members of an ecosystem are connected based on nutritional needs. Trophic level is the representation of energy flow in an ecosystem.
Energy flows through the trophic levels which moved from producers to subsequent trophic levels are unidirectional. Energy level decreases from the first trophic level upwards due to loss of energy in the form of heat at each trophic level. This energy loss at each tropic level is quite significant. Hence there are usually not more than four-five trophic levels, beyond this the energy available is negligible to support an organism.
The trophic level interaction involves three concepts namely:-
Food Chain, Food Web, and Ecological Pyramids
Food Chain
Transfer of food energy from green plants (producers) through a series of organisms with repeated eating and being eaten link is called a food chain. E.g. Grasses ? Grasshopper ? Frog ? Snake ? Hawk/Eagle .
Each step in the food chain is called trophic level. A food chain starts with producers and ends with top carnivores.