Phosphorus and the Kawartha Lakes - Lakefield Herald

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concentration. This demonstrates that lakes phosphorus concentration increase along the lake continuum. 35 30 Phosphorus (µg/l) 25 20 15 10 5 a ab b 0 1972 1976 2005 Year Figure 5.1 Bar graph showing mean August total phosphorus concentrations and standard deviations for ten Kawartha lakes (Balsam, Big Bald, Upper Buckhorn, Cameron, Clear, Katchewanooka, Pigeon, Sturgeon, Upper and Lower Stony) for 1972, 1976 and 2005. Different letters denote significant differences between means following ANOVA procedure and Tukey’s test (p = 0.001)(N=10). 70 60 r 2 = 0.17 P = 0.068 70 60 r 2 = 0.22 P = 0.020 Total phosphorus (µg/l) 50 40 30 20 Total phosphorus (µg/l) 50 40 30 20 10 10 0 0 a) 1970 1975 1980 1985 1990 1995 1970 b) 1980 1990 2000 Year Year Figure 5.2 Linear regression of August total phosphorus concentrations across years for Sturgeon lake from a) 1971-1991, N = 21, b) 1971-2005, N = 24. Note, it appears phosphorus concentrations have remained relatively constant since 1988. 19
40 Phosphorus (µg/l) 35 30 25 20 15 Lake vs TP 1972 Lake vs TP 1976 Lake vs TP 2003 Lake vs TP2004 Lake vs TP 2005 10 5 BALSAM CAMERON PIGEON STURGEON CLEAR BUCKHORN KATCHEWANOO Figure 5.3 Spline curve of seven Kawartha Lakes along a down stream/lake gradient from Balsam Lake to Katchewanooka Lake. Phosphorus levels are pooled August concentrations and patterns should be interpreted cautiously as sample intensity varies greatly between years and lakes. 20
Page 1 and 2: Phosphorus and the Kawartha Lakes (
Page 3 and 4: Table of Contents EXECUTIVE SUMMARY
Page 5 and 6: List of Tables Table 1.0 Values for
Page 7 and 8: Figure 5.2 Linear regression of Aug
Page 9 and 10: mobilization process can be quite c
Page 11 and 12: 1994; MOE, 1976), Ministry of Natur
Page 13 and 14: IJ 2 IJ 18 IJ 5 IJ 1 IJ 3 Legend IJ
Page 15 and 16: Take Home Message Previous models o
Page 17 and 18: Results Although the Kawartha Lakes
Page 19 and 20: 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 Lam
Page 21 and 22: Table 4.1 Watersheds employed in la
Page 23 and 24: Results - Multiple Regression Model
Page 25: 5.0 Past and Present Phosphorus lev
Page 29 and 30: Conclusion The majority of the arch
Page 31 and 32: References Bayley, S.E. Prather, C.
Page 33 and 34: Schindler, D.W., 1987. Detecting ec
Page 35 and 36: Appendix A Watershed Land classific
Page 37 and 38: Land Class / Watershed ID 17 18 19
Page 39 and 40: Appendix B Land classification buff
Page 41 and 42: deciduou -0.2521 -0.1579 0.0578 0.2
Page 43 and 44: Pearson and Kendall Correlations wi
Page 45 and 46: Chapter 4 Regressions Buffer Bivari
Page 47 and 48: Bivariate Fit of Average P (ug/l) B
Page 49 and 50: Watershed Accumulation Bivariate Fi
Page 57 and 58: Stats for Figure 5.2 Oneway Analysi
Page 59 and 60: Stats for Figure 5.4 Nonlinear Regr
Page 61 and 62: Data used in Figure 5.2 Year 1971 1
Page 63 and 64: Appendix E Basin Contribution Diagr
Page 65 and 66: Sturgeon Lake 6 Drainage Basins + u
Page 67 and 68: Chemong Lake 1 Drainage Basin 0 5 1
Page 69 and 70: Rice Lake 4 Drainage Basins + up ca
Page 71 and 72: Trent Severn Waterway Flow Overview
Page 73 and 74: Central Kawartha Lakes (Sturgeon, K
Page 75: Appendix G Future Considerations Th

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