Ecosystem is an integrated system composed of interacting biotic and abiotic components. It is important in this definition that an ecosystem is a system, which implies that it has boundaries and that we can distinguish between the Ecosystem and its environment – environment in principle means the rest of the world beyond the boundaries or system
Ecosystem is dependent on the function of the ecosystem and is determined by the addressed problem
It is important to understand fully the function and the reactions of ecosystem in both ecological research and environmental management the two basic questions in this context are
1.which fundamental properties characterize ecosystem
2.Is it possible to formulate basic scientific proposition that are able to explain the functions of ecosystem