TABLE 1.
Characteristics of nine separate iron mat sitesa
| Site | Temp (°C) | pH | Mean level (μM) of: |
Description | ||||
|---|---|---|---|---|---|---|---|---|
| Fe(II) | TDN | DOC | TDP | Methane (SD) | ||||
| South River | 9 | 5.5 | 270 | Flocculant mat, seep adjacent to river | ||||
| Ref 6 site | 11 | 5.5 | 480 | Wet sedge meadow | ||||
| Toolik River TK 1 | 8.2 | 5.2 | 60 | Pool near edge of stream | ||||
| Toolik River TK 3 | 9 | NDb | 20 | Wet sedge meadow | ||||
| Kuparuk River Fe seepc | 11 | 6.5 | 170 | 33.7 | 861 | 0.91 | 33.14 (25.6) | Flocculant mat, seep at river bank |
| Kuparuk River potholec | 9 | 5 | 320 | 64 | 1,578 | 0.5 | 0.56 (0.07) | Small pool |
| Toolik BW1c | 10 | 5 | 60 | 16.4 | 616 | 0.07 | 5.26 (7) | Wet sedge meadow |
| Toolik BW2c | 10 | 5 | 20 | Wet sedge meadow | ||||
| Toolik base Fe seepc | 11 | 6 | 170 | 8.2 | 237 | 0.14 | 2.13 (2.64) | Flocculant mat adjacent to lake |
a
South River and the Ref 6 site are located near the burn site on the Anaktuvuk River. The other sites are in the vicinity (≤20 km) of TFS. Blank spots in the table signify that no data were collected.
b
ND, not determined.
c
Samples collected for microbial community analysis.