FOOD CHAINS AND FOOD WEBS etc..

The transfer of energy from the source in plants through a series of organisms,by eating and being eaten ,constitutes food chains.At each transfer, a large proporationof energy is lost in the form of heat .These food chains are not isolated sequences,but are interconnected with each other.This interlocking pattern is known as the food web .Each step of the food web is calle da trophic level .These trophic form the ecological pyramid.