Legacy Phosphorus and Harmful Algal Blooms in Lake Erie

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Show<strong>in</strong>g Success of BMPs for PP Log(PP) 1970 1975 1980overall 1985 1990 1995 2000 bdif ANCOVA Year as categorical variable y=mx+b+bdif year Sum of bdif year is 0 Look at bdif vs year Log(Flow)
Show<strong>in</strong>g Success of BMPs for PP Coefficients of: lnPP on YR Level of YR Coefficient Level of YR Coefficient Level of YR Coefficient 1975 0.2039 1987 -0.1595 1996 0.0344 1976 0.1540 1988 0.2823 1997 0.0503 1977 0.3750 1989 0.0897 1998 -0.0309 1978 -0.0302 1990 0.1940 1999 -0.1648 1982 -0.0099 1991 0.0546 2000 -0.1679 1983 0.0754 1992 -0.0894 2001 -0.3439 1984 0.0150 1993 0.0036 2002 -0.2071 1985 0.1150 1994 0.0451 2003 -0.3136 1986 0.1923 1995 -0.0063 2004 -0.3611
Page 1 and 2: Legacy Phosphorus and Harmful Algal
Page 3 and 4: Background: NCWQR Monitoring Raisin
Page 5 and 6: Legacy P? Legacy pollutants: PCBs,
Page 7 and 8: II. Lake Erie Recent History
Page 9 and 10: “I heard Lake Erie is the place f
Page 11 and 12: What was wrong with Lake Erie? HABs
Page 13 and 14: Central Basin Oxygen Depletion Rate
Page 16 and 17: Shift in lake response WHY? Total P
Page 18 and 19: Forms of Phosphorus (Total) Dissolv
Page 22 and 23: Showing Success of BMPs for PP p
Page 24 and 25: Importance of DRP (Total) Dissolved
Page 26 and 27: Importance of DRP Dissolved P • 9
Page 28 and 29: Risk of Phosphorus Loss Source fact
Page 30 and 31: P concentration in soil 83% Fertili
Page 32 and 33: Legacy P… Does not predict PP or
Page 34 and 35: Verdict(?)… Changes in management
Page 36 and 37: Management Don’t make things wors
Page 38: Rock Creek 6/25/06 The End

Legacy Phosphorus and Harmful Algal Blooms in Lake Erie

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