Notes on Freshwater Biology

Fresh piddle such as lakes and rivers have determined the pickle of family through out history. Witness all the great cities: cracking of Italy and Cairo to name but two are make on rivers: The Tiber and the Nile. The reason was the in history freshwater was revered for drinking water, food, transport and a disposal route for waste. The travel obtained from the rivers was an important source of protein for the peoples living nearby. Now in the twenty-first coulomb freshwater look foring and other recreational uses of water such as sailing and narrowboat holidays are economically important. The downside of the proximity of freshwater to habitation centres is the waterborne disease or diseases with a freshwater vector such as malaria, amongst others. If we think at a map of Kent from the 17th century we posterior end chatter the effects of proximity on the demographic makeup of the area. The marshes were subsequently drained to give up farmland. fresh water c an be damaged in many enchant canal, there are four main ways of minus freshwater systems these are: Acidification, Drainage, Eutrophication, and River Engineering. Acidification normally occurs in the uplands as a result of atmospheric pollution. Drainage occurs to brook farmland in the lowland marsh systems or in the upland marshes to provide forestry. Eutrophication occurs when excesses of Nitrogen and phosphorous and other nutrients are added to the water from dissentious sources.

River Engineering such as modification to provide hydro galvanising power stations, millraces for water powered mill wheels, and other uses. deadening can also occur from recreational damage (sailing in the Norfolk Broads), introduced species,! hepatotoxic pollution, abstraction for irrigation, inter basin transfer salination, sedimentation, fish horticulture and dam building. Aldo Leopold said that ...mechanised man, having rebuilt the landscape, is now rebuilding the waters. The sober citizen who would neer submit his watch... If you want to get a full essay, differentiate it on our website: OrderEssay.net

If you want to get a full information about our service, visit our page: write my essay