There is an interaction between all organism and their physical environment that maintain a balance between the organisms & physical environment. exchange of the substance and flow of energy. It is called as Ecosystem or Ecological system.
Ecosystem is a functional unit of ecology.Term ecosystem was first used by British ecologist Arthur Tansley. Tensley defined ecosystem as the interaction between the biotic factors (plants, animals & other organisms) and abiotic factor (weather, soil.air & temperature).
Before Tansley, Karl Mobius (1877) called it as Biocoenosis, Forbes(1987) as Microcosm and Mishra as Ecocosm. But the ecosystem, is universally accepted.
