Eutrophication BOD and Eutrophication -rapid succession in a body of water because of an increase in biological productivity (Oligotrophic lakes and rivers have clear water and low biological productivity) -low nutrient levels high nutrient levels good light penetratio poor light penetration -high dissolved oxygen low dissolved oxygen deep waters shallow waters -low algal growth -high algal growth small mouth bass, lake trout carp bullhead, catfish pike, sturgeon, whitefish (a)Oligotrophic lake (b)Eutrophic lake
Eutrophication BOD and Eutrophication - rapid succession in a body of water because of an increase in biological productivity. (Oligotrophic lakes and rivers have clear water and low biological productivity)
lower nutient input high nutient input l事1 oguchi epilimnion、加 gh production …∴…/ thermocline… hypolimnion Chigh orgen weand permit olume OL/GOTROPHIC E
Chap 3 Eutrophication and Red tide 3.1 What is Eutrophication?(definition) 3.2 Why should we be concerned? (harmful effect 3. 3 The nutrient in the coastal seawater 3.4 Eutrophication in the coastal seawater 3.5 HABs and red tide
Chap.3 Eutrophication and Red tide 3.1 What is Eutrophication? (definition) 3.2 Why Should We Be Concerned? (harmful effect) 3.3 The nutrient in the coastal seawater 3.4 Eutrophication in the coastal seawater 3.5 HABs and Red tide
3. 3 The nutrient in the coastal seawater A. Sources B. nitrogen in the seawater C. phosphate in the seawater
3.3 The nutrient in the coastal seawater A. Sources B. nitrogen in the seawater C. phosphate in the seawater
3. 3 The nutrient in the coastal seawater The main addition of Nand p compounds to the marine environment are considered to be sewage wastes, either directly discharged to the sea or via rivers into which treated waste are discharged Other sources are agricultural runoff and wastes from food processing industries but these are normally considered to be small compared to the input of sewage
◼ The main addition of N and P compounds to the marine environment are considered to be sewage wastes, either directly discharged to the sea or via rivers into which treated waste are discharged. ◼ Other sources are agricultural runoff and wastes from food processing industries,but these are normally considered to be small compared to the input of sewage. 3.3 The nutrient in the coastal seawater