The functions of an ecosystem are-

a. Both biotic and abiotic components live in ecosystem which interacts with each other forming a stable, self-supporting system.

b. Energy flow in unidirectional manner starting from sunlight to producers, herbivores, carnivores and finally decomposers thus utilising solar energy to produce chemical energy in form of glucose by plants which is main source of food for all living organisms.

c. Recycling of nutrients also occurs.