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All the organisms depend on each other. for example, take sparrow campaign in china.It killed lakhs of sparrows. this effected the crops and the production highly decreased and great chinese famine occurred.due to excess use of pesticides, fungicides the land became unfertile. thus we can say that all the organisms depend on each other...........
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An ecological realtionship is the relationship between organisms in an ecosystem. all orgainsms in an ecosystem are connected. each interaction depends on the one before it.for example a snake eatting mouse.
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