TABLE 2.
Environmental parameters in the coastal Chukchi and Beaufort Seas near Barrow, Alaska
| Parameter | Summer 2007 |
Winter 2008 |
Summer 2008 |
Winter 2009 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chukchi |
Beaufort |
Chukchia |
Chukchi |
Beaufort |
Chukchi |
Beaufort |
|||||||
| Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | Mean | SD | |
| No. of locations | 2 | 2 | 3 | 2 | 4 | 1 | 3 | ||||||
| Prokaryotes (106 cells/ml) | 1.75 | 0.25 | 1.91 | 0.25 | 0.55 | 0.18 | 0.93 | 0.00 | 1.21 | 0.11 | 0.22 | 0.52 | 0.05 |
| Water temp (°C) | 5.1 | 0.6 | 3.2 | 1.0 | -0.5 | 2.2 | 4.2 | 2.9 | 2.5 | 1.5 | -1.7 | -1.7 | 0.0 |
| Salinity | 32.0 | 0.0 | 22.0 | 2.8 | 35.3 | 0.6 | 32.0 | 0.0 | 30.3 | 0.5 | 30.0 | 34.7 | 0.6 |
| Chlorophyll a concn (μg/liter) | 0.55 | 0.06 | 0.41 | 0.11 | 0.06 | 0.01 | 1.62 | 0.38 | 1.03 | 0.12 | 0.14 | 0.04 | 0.00 |
| Ammonium concn (μM) | 0.39 | 0.02 | 0.25 | 0.01 | 1.88 | 0.23 | 0.74 | 0.35 | 0.66 | 0.48 | 4.72 | 3.60 | 0.14 |
| Nitrate/nitrite concn (μM) | 0.90 | 0.26 | 0.25 | 0.02 | 11.35 | 0.19 | 0.63 | 0.29 | 1.47 | 1.21 | 6.86 | 6.98 | 0.58 |
| Phosphate concn (μM) | 0.53 | 0.00 | 0.22 | 0.06 | 1.95 | 0.08 | 0.72 | 0.14 | 0.72 | 0.07 | 1.30 | 0.99 | 0.09 |
| Silica concn (μM) | 9.92 | 1.06 | 4.65 | 0.21 | 23.0 | 0.85 | 9.61 | 0.27 | 9.01 | 0.40 | 18.2 | 15.9 | 0.40 |
| Prokaryotic production (nmol of C liter−1 h−1) | 237 | 39 | 280 | 35 | 20 | 4 | 156 | 97 | 180 | 22 | 103 | 19 | 1 |
a
The Beaufort Sea was not sampled in winter 2008.