Lecture-EutrophicationI_of_III

Lecture-EutrophicationI_of_III - Eutrophication I ISP 217...

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1 Eutrophication I ISP 217 Dr. Peacor
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2 In the news this month:
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3 Algae “Muck” : Saginaw Bay From the article: Alex Sagady, an environmental consultant in East Lansing, has complained for years about the lack of action from the DEQ…. "This needs to be litigated," he said. "Someone needs to go to court against the DEQ and say they are impermissibly ignoring water quality impairments on recreation caused by nutrients in Saginaw Bay." Eric Alexander, chief of the Lakes Erie and Huron unit of the DEQ Surface Water Assessment said. "It would probably be better to let it run its course and let people provide the comments and then we can provide official responses to those concerns,"
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4 LET'S HEAR IT The Michigan Department of Environmental Quality is accepting written comments until Feb. 25 on a draft Water Quality and Pollution Control in Michigan, 2008 Sections 303(d), 305(b), and 314 Integrated Report. The report, issued every two years, describes the status of water quality in Michigan and includes a list of water bodies that are not attaining Michigan Water Quality Standards and require the establishment of pollutant Total Maximum Daily Loads. Comments may be submitted to Sarah LeSage, Michigan Department of Environmental Quality, Water Bureau, 525 West Allegan Street, P.O. Box 30273, Lansing, MI 48909-7773 (or [email protected]). Tell them what YOU think:
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5 Eutrophication I Lecture Overview 1. 6-10. Introduction – summarize eutrophication. 1. 11-19. Nutrients and their effect on phytoplankton. 1. 20-35. Which nutrient limits phytoplankton growth: Liebig's law and limiting nutrients 1. 36-46. Limiting nutrient controversy: Science’s results are not what some people wanted to hear.
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6 Eutrophication Definition An increase in the external supply of nutrients to an ecosystem that results in an increase in plant growth Kind of like too much of a good thing. Section 1 Introduction
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7 Fish kills Eutrophication Why is it a problem? Phytoplankton blooms Section 1 Introduction
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8 Eutrophication Dissolved oxygen (mg/L) Depth surface bottom 0 20 At high productivity At low productivity Class problem: Does FIGURE indicate low or high productivity lakes would harm fish? Where in the lake is worst for fish? Section 1 Introduction
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9 of the Dead Zone Dawn Newsweek October 18, 1999 Therefore, eutrophication affects ecosystems, recreation, economies and lives. Section 1 Introduction
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10 Who cares? MSU students. MSU’ Student Sustainability Organization: ECO https://www.msu.edu/~eco/
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11 Eutrophication Some terminology Oligotrophic Eutrophic low nutrient input high nutrient input (well fed) Section 1 Introduction
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Eutrophication An increase in the external supply of nutrients to an ecosystem that results in an increase in plant growth Definition What are nutrients? (C, N, P, Fe, etc.)
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This note was uploaded on 03/23/2010 for the course ISP 217 taught by Professor Peacor during the Spring '08 term at Michigan State University.

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Lecture-EutrophicationI_of_III - Eutrophication I ISP 217...

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