LEWIS SMITH LAKE - Auburn University

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and therefore is the element most often limiting to plant growth in freshwater ecosystems. In some cases, phosphorus concentrations, relative to nitrogen, are high and nitrogen availability becomes limiting. This usually occurs at total nitrogen to total phosphorus ratios
found at concentrations ranging from 31 to 76 Ilg/L and 22 to 102 Ilg/L, respectively. Highest concentrations ofboth metals were found in Brushy Creek embayment (station 8). Phytoplankton densities in 1995 ranged from a low of357 organisms/ml at station I during the spring 1995 to 2,294 organisms/ml at station 3 during the summer 1995. Highest densities occurred during the summer and fall and lowest densities during the spring. Seasonal mean densities were usually similar among stations within a season and mean embayment densities were similar to nearby mainstem station densities. In 1995, seasonal mean phytoplankton densities were about twice what they were at the same locations in 1986. On an annual basis, mean densities were significantly (p < 0.05) higher in 1995 at all locations except at mainstem at Duncan's Creek (station 5) and mainstem downstream from the confluence ofSipsey Fork and Brushy Creek (station 7). Numerical dominance was shared by green algae (Division Chlorophyta) and diatoms (Division Chrysophyta) at mainstem sampling stations. Diatoms were generally more abundant in spring months and green algae more abundant in summer and fall months. The blue-green algae (Division Cyanobacteria) were the third most abundant algal Division. This pattern ofalgal dominance is common in Alabama lakes (Bayne et al. 1993a, 1993b, and 1995). Fifty-four algal taxa were identified from samples taken from Smith Lake. These taxa are generally common constituents of lake phytoplankton communities in this region (Taylor et al. 1979). Among the dominant phytoplankton genera, all occur with great frequency in reservoirs ofthe southeastern United States (Taylor et al. 1979). Phaeophytin-corrected, chlorophyll '" concentration is an indicator ofphytoplankton biomass and is a variable often used to determine the trophic status oflakes in the absence ofmacrophytes (Carlson 1977 and EPA 1990). Corrected chlorophyll '" concentrations from about 6.4 to 56 J.Lg/L are indicative of eutrophic waters (Carlson 1977). Waters having concentrations> 56.0 J.Lg/L are considered hypereutrophic and waters with concentrations offrom 1.0 to
Page 1 and 2: LEWIS SMITH LAKE Phase I Diagnostic
Page 3 and 4: EXECUTIVE SUMMARY
Page 5 and 6: January 1986 (Bayne et al. 1987). T
Page 7: Total alkalinity, the concentration
Page 16 and 17: etween 10 and 15 mgIL as CaCO, but
Page 19 and 20: Table 1-1. Table 1-2. Table 2-1. Ta
Page 21 and 22: List ofTables (Continued) Table 10-
Page 23 and 24: List ofTables (Continued) Table 10-
Page 25 and 26: LIST OF FIGURES Figure 8-I. Locatio
Page 27 and 28: PARTI. DIAGNOSTIC STIJDY 1
Page 29 and 30: Table I-I. Morphometric characteris
Page 31 and 32: 2.0 BASIN GEOLOGY AND DRAINAGE Smit
Page 33 and 34: Table 2-1 (Cont'd) Suitability/Limi
Page 35 and 36: 4.0 SIZE AND ECONOMIC STRUCTIJRE OF
Page 37 and 38: - U. II Table 4-2. Number ofbusines
Page 39 and 40: I, Table 4-4. Agricultural producti
Page 42 and 43: 7.0 LAKE USE COMPARISON WIlli NEARB
Page 44 and 45: 00 Table 8-1. Actual point source l
Page 46 and 47: N 0 Table 8-1 (Continued) Actual To
Page 48 and 49: N N Table 8-1 (Continued) Actual To
Page 50 and 51: Table 8-1 (Continued) Actual Total
Page 52 and 53: tv 0- Table 8-2 (Continued) Permitt
Page 54 and 55: Annual point source total suspended
Page 56 and 57: Table 9-1. Location oftributary sam
Page 58:
nitrogen, nitrite-nitrogen, total a
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highly positively correlated (p < 0
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(31.4% and 30.5%, respectively). Ro
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In 1985, the paucity ofinfonnation
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population of 1.15 million. In addi
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V> tv Table 10-1. Schedule of activ
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..,. en IN o 2 4 i Miles Figure 10-
Page 82 and 83:
sample were poured into Nalgene"' c
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flows encountered in 1995,428 days.
Page 87 and 88:
Table 10-6. Mean (range) temperatur
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Table 10-8. Mean (range) temperatur
Page 94 and 95:
Examination oftemperature, DO and s
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Table 10-10. Mean (range) turbidity
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Table 10-12. Mean (range) turbidity
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Table 10-14. Mean (range) Secchi di
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Table 10-16. Mean (range) Secchi di
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a low of 7 mgIL to a high of67 mgIL
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Table 10-18. Mean (range) pH, total
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Table 10-20. Mean (range) pH, total
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Table 10·21. Ammonia, nitrite, nit
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Table 10-23. Mean (range) ammonia,
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in concert with changes in algal bi
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Table 10-25. Orthophosphate and tot
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Table 10-27. Mean (range) orthophos
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stratification (Fig. 10-2). During
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Table 10-30. Chloride, total organi
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Table 10-33. Mean (range) chloride,
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In August 1986, iron and manganese
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1971). Productivity measured during
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Table 10-36. Mean (range) phytoplan
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Table 10-39. Phytoplankton taxa by
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(station 2) in the winter to a high
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Table 10-42. Mean maximum dry weigh
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Table 10-43. Temporal and spatial v
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11.0 BIOLOGICAL RESOURCES 11.1 Fish
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Table 11-1. Total number, catch per
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Table \\-3. Ranking by quality indi
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Table 11-5. Checklist of fish speci
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Table 11-5 (Continued) Scientific N
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11.2 WILDLIFE A checklist ofbirds,
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Table 11-7 (Continued) Family Scien
Page 171 and 172:
Page 174:
Page 177 and 178:
Page 179 and 180:
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PART II. FEASffiILITY STUDY 154
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from Atlanta, Georgia received an a
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An additional source ofnutrients to
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Indirectly, low pH can result in hi
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13. Are there additional feasible a
Page 191 and 192:
Bayne, D. R., W. C. Seesock, P. P.
Page 193:
Taylor, W.D., S.c. Hem, L.R. Willia
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LEWIS SMITH LAKE - Auburn University

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