Table 3.
2009 lake-wide data for nutrients and DOC in water and seston measurements of Hg, phytoplankton abundance, and nutrients (SE = standard error, na = not available).
| Lake basin
|
Seston
|
THg (ng/g)
|
MeHg (ng/g)
|
DOC (mg/L)
|
||||||
|---|---|---|---|---|---|---|---|---|---|---|
| No. | Name | Date | N | mean | SE | mean | SE | N | mean | SE |
| 4 | South Lake A | 8/19/09 | 3 | 30.2 | 0.7 | 3.05 | 0.01 | 3 | 4.33 | 0.12 |
| 7 | Port Henry | 8/5/09 | 3 | 64.1 | 7.8 | 4.62 | 0.17 | 3 | 3.27 | 0.02 |
| 7 | Port Henry | 8/24/09 | 3 | 54.2 | 6.7 | 5.92 | 0.29 | 3 | 3.46 | 0.02 |
| 7 | Port Henry | 9/8/09 | 3 | 104.5 | 9.8 | 9.85 | 0.39 | 3 | 3.19 | 0.07 |
| 9 | Otter Creek | 8/5/09 | 3 | 54.4 | 3.5 | 4.36 | 0.22 | 3 | 3.35 | 0.03 |
| 9 | Otter Creek | 8/24/09 | 3 | 48.6 | 1.7 | 5.39 | 0.63 | 3 | 3.19 | 0.04 |
| 16 | Shelburne Bay | 8/12/09 | 3 | 59.9 | 4.0 | 7.87 | 0.63 | 3 | 3.02 | 0.01 |
| 19 | Main Lake | 8/12/09 | 3 | 72.4 | 6.4 | 7.87 | 1.18 | 3 | 2.98 | 0.04 |
| 19 | Main Lake | 8/26/09 | 3 | 56.6 | 0.8 | 6.15 | 0.27 | 3 | 3.32 | 0.09 |
| 21 | Burlington Bay | 8/26/09 | 3 | 61.0 | 1.9 | 6.20 | 0.48 | 3 | 3.26 | 0.05 |
| 25 | Malletts Bay | 8/18/09 | 3 | 103.2 | 4.8 | 8.39 | 0.15 | 3 | 3.55 | 0.23 |
| 25 | Malletts Bay | 9/10/09 | 3 | 45.3 | 1.7 | 4.32 | 0.44 | 3 | 3.27 | 0.04 |
| 33 | Cumberland Bay | 8/10/09 | 3 | 105.2 | 7.2 | 9.01 | 0.32 | 3 | 3.17 | 0.05 |
| 34 | Northeast Arm | 8/6/09 | 3 | 80.3 | 20.4 | 9.56 | 3.44 | 3 | 3.35 | 0.06 |
| 34 | Northeast Arm | 8/25/09 | 3 | 52.9 | 3.4 | 3.41 | 0.53 | 3 | 3.61 | 0.15 |
| 36 | Isle LaMotte (off Grand Isle) | 8/10/09 | 3 | 184.7 | 94.4 | 16.48 | 7.61 | 3 | 2.93 | 0.05 |
| 40 | St. Albans Bay | 8/6/09 | 3 | 79.3 | 6.2 | 5.45 | 0.73 | 3 | 3.53 | 0.04 |
| 46 | Isle LaMotte (off Rouses Pt) | 8/11/09 | 3 | 216.4 | 94.8 | 30.33 | 11.51 | 3 | 2.96 | 0.03 |
| 51 | Missisquoi Bay | 8/11/09 | 3 | 65.8 | 1.0 | 2.34 | 0.21 | 3 | 4.60 | 0.15 |
| Lake basin no. | Chlorophyll-a (mg/L) | Phytoplankton biovolume (μm3/L) | Phytoplankton density (cells/L) | Temperature (°C) | Total nitrogen (mg/L) | Total phosphorus (μg/L) | Dissolved phosphorus (μg/L) |
|---|---|---|---|---|---|---|---|
| 4 | 12.6 | 2,200,000,000 | 851,000 | 25.7 | 0.41 | 41.9 | 14.3 |
| 7 | 6.48 | 180,000,000 | 281,000 | 20.8 | 0.33 | 18.5 | 7.1 |
| 7 | 8.17 | 635,000,000 | 685,000 | 22.7 | 0.32 | 19.8 | 9.6 |
| 7 | 4.14 | 16,900,000 | 68,600 | 20.7 | 0.32 | 16.9 | 7.6 |
| 9 | 7.08 | 173,000,000 | 142,000 | 21.6 | 0.33 | 18.7 | 9 |
| 9 | 9.03 | 185,000,000 | 298,000 | 23.0 | 0.28 | 12.6 | 6.8 |
| 16 | 0.76 | 23,200,000 | 88,000 | 23.2 | 0.31 | 12.7 | 6.8 |
| 19 | 1.23 | 84,500,000 | 157,000 | 22.2 | 0.32 | 10.3 | 6.4 |
| 19 | 3.77 | 117,000,000 | 220,000 | 22.5 | 0.3 | 11.3 | 5 |
| 21 | 5.21 | 56,400,000 | 304,000 | 23.6 | 0.32 | 13.4 | 7.6 |
| 25 | 3.48 | 92,900,000 | 234,000 | 25.2 | 0.27 | 9.8 | 6.7 |
| 25 | 4.37 | 103,000,000 | 199,000 | 21.2 | 0.24 | 8.8 | 5 |
| 33 | na | na | na | na | na | na | na |
| 34 | 1.92 | 415,000,000 | 184,000 | 21.9 | 0.25 | 14.8 | 7.3 |
| 34 | 5 | 113,000,000 | 167,000 | 23.9 | 0.25 | 15.2 | 9.6 |
| 36 | na | na | na | na | na | na | na |
| 40 | na | na | na | na | na | na | na |
| 46 | 2.13 | 6,600,000 | 13,300 | 23.0 | 0.3 | 21.8 | 18.3 |
| 51 | 2.52 | 395,000,000 | 2,880,000 | 22.9 | 0.51 | 62.9 | 37.7 |