http://en.wikipedia.org/wiki/Lotic_system_ecology
The ecosystem of a river is the river viewed as a system operating in its natural environment, and includes biotic(living) interactions amongst plants, animals and micro-organisms, as well as abiotic (nonliving) physical and chemical interactions.
The ecosystem of a river is the river viewed as a system operating in its natural environment, and includes biotic(living) interactions amongst plants, animals and micro-organisms, as well as abiotic (nonliving) physical and chemical interactions.
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