Answers

2015-01-26T16:40:16+05:30
Naturally occurinf eco-systems means eco-systms which are created naturaaly without human activites or intellectual.
for eg ; forest ,pond,oceean etc are natural eco-systems
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2015-01-27T17:21:29+05:30
A disturbance is a temporary change in environmental conditions that causes a pronounced change in an ecosystem. ex. tsunamifirestormsimpact eventsclimate change................
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