Give two examples of artificial or man made ecosystems. List the salient features by which they differ from natural ecosystems.

Aquarium and farm house are two manmade ecosystem.

In artificial ecosystem biotic and abiotic components are maintained artificially like in aquarium fishes are provided with oxygen supply, cleaning, food supply and irrigation is carried out in crop or farm house.

When abiotic or biotic components are maintained naturally in natural ecosystems ecological services like nutrient cycling, self stability, leaching, absorption of pollutants and fear developed due to global warming (ecological services) etc.