EutrophicationII_of_III

EutrophicationII_of_III - Eutrophication II ISP 217 Dr....

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Eutrophication II ISP 217 Dr. Peacor
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Eutrophication II Lecture Overview 1. 3-14. More on nutrient limitation – different water systems and lakes aging 1. 15-19. Human generated sources of eutrophication - overview 1. 20-25. Point source: raw sewage and 3 negative effects. 1. 26-42. Raw sewage treatment: clean it up! 1. 43-48. Non-point sources of eutrophication
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Which nutrient limits phytoplankton growth? Experimental treatment Nutrient Limitation Growth rate Control +C +N +P “Control” : This is a reference treatment. It yields what is expected if no nutrients are added. + C : Extra C (carbon) is added. Will this lead to increased growth rate? Compare to the control. + N and + P : Same as + C, but for nitrogen and phosphorus.
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Which nutrient limits phytoplankton growth? Growth rate Experimental treatment Control +C +N +P What RESULTS are expected if no nutrients affect growth? Nutrient Limitation
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Growth rate Experimental treatment Control Freshwater (usually) Results observed: Weight of the evidence +C +N +P Which nutrient limits phytoplankton growth? Nutrient Limitation
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Growth rate Experimental treatment Control +C +N +P Coastal marine, estuaries (usually) Weight of the evidence Which nutrient limits phytoplankton growth? Nutrient Limitation
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Growth rate Experimental treatment Control +C +N +P Open ocean (usually) Weight of the evidence +Fe Which nutrient limits phytoplankton growth? Nutrient Limitation
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Lake aging- is eutrophication a natural process? Do lakes become more eutrophic as they age? (If so, then what’s the problem?) Is Eutrophication Natural?
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Lake aging- is eutrophication a natural process? Lakes fill in over time Can look at sediment to diagnose changes in production. Sediments accumulate Is Eutrophication Natural?
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Lake aging- is eutrophication a natural process? collect a sediment core Let’s go back in time …!! So need history of algae production… Is Eutrophication Natural?
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sliced sediment core dating organic analysis Lake aging- is eutrophication a natural process? paleo-reconstruction Is Eutrophication Natural?
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sedimentation CO 2 carnivore C plant C herbivore C detrital C detrital C decomposition CO 2 decomposition thermocline storage death defecation respiration respiration watershed inputs CO 2 HCO 3 - more nutrients = more organic storage in sediments Hypothesis: Is Eutrophication Natural?
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This note was uploaded on 03/22/2010 for the course ISP 217 taught by Professor Peacor during the Spring '08 term at Michigan State University.

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EutrophicationII_of_III - Eutrophication II ISP 217 Dr....

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