Question

What do you understand by the term eutrophication

Answer 1

The eutrophication of the Potomac River is evident from the bright green water, caused by a dense bloom ofcyanobacteria.

Eutrophication (Greek: eutrophia (from eu"well" + trephein "nourish".); German:Eutrophie), or more preciselyhypertrophication, is the ecosystem's response to the addition of artificial or natural nutrients, mainly phosphates, throughdetergents, fertilizers, or sewage, to an aquatic system.[1] One example is the "bloom" or great increase of phytoplankton in a water body as a response to increased levels of nutrients. Negative environmental effects include hypoxia, the depletion of oxygen in the water, which may cause death to aquatic animals.

Answer 2

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• Type of waste pollution.
• It is a process of depletion of oxygen from water bodies either through natural or due to human activities.
• This process takes place due to introduction of nutrients and chemicals through discharge of domestic sewage, waste from industries and from agricultural fields.