1. It is normally an open system with a continuous, but variable influx and loss of materials and energy.
2. An ecosystem is an overall integration of the whole mosaic of interacting organisms and their environment.
3. It is a basic, functional unit with no limits of boundaries.
4. It consists of biotic and abiotic components interacting with each other.
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5. Its functional unit is capable of energy transformation, circulation and accumulation.
6. An ecosystem is the smallest unit of biosphere.
7. Different types of ecosystem are present in different areas.