TABLE 1.
Geochemistry measured in each depth increment by station
| Station and sample code (water column depth) | Sediment depth (cm)a | PO4 concn (μM) | NO3 + NO2 concn (μM) | NH4 concn (μM) | SO4 concn (μM) | SO4 reduction rate (cm−3 day−1) | Mn(II) concn (μM) | Porosity | Si(OH)4 concn (μM) | O2 concn (μM) |
|---|---|---|---|---|---|---|---|---|---|---|
| 3 (200 m) | ||||||||||
| GMT-1 | 0.75 | 1.62 | 20.07 | 5.20 | 28.5 | 82 | NDb | 0.899 | 111.3 | 0 |
| GMT-3 | 2.50 | 6.05 | −0.04 | 8.86 | 28.4 | 819 | 21.0 | 0.869 | 93.1 | 0 |
| GMT-5 | 4.50 | 7.20 | 0.40 | 27.21 | 28.4 | ND | 22.6 | 0.849 | 133.6 | 0 |
| GMT-7 | 9.00 | 6.16 | 0.04 | 39.22 | 28.5 | 547 | 20.5 | 0.827 | 117.2 | 0 |
| GMT-9 | 16.00 | 7.25 | 0.04 | 38.35 | 28.5 | 444 | 19.4 | 0.785 | 154.5 | 0 |
| GMT-11 | 25.50 | 7.03 | 0.11 | 110.42 | 28.6 | 591 | 20.3 | 0.798 | 111.3 | 0 |
| 6 (800 m) | ||||||||||
| GMS-1 | 0.25 | 4.27 | 34.90 | 11.46 | 28.8 | 26 | ND | 0.907 | 85.4 | 105.4 |
| GMS-3 | 1.25 | 6.34 | 25.20 | 3.77 | 28.8 | ND | 2.6 | 0.871 | 127.7 | 55.1 |
| GMS-5 | 2.50 | 9.65 | 2.08 | 2.28 | 28.8 | ND | 64.7 | 0.863 | 149.5 | 15.4 |
| GMS-7 | 4.50 | 5.98 | ND | 17.04 | 28.7 | 21 | 137.1 | 0.847 | 125.9 | 0 |
| GMS-9 | 9.00 | 12.08 | 0.00 | 44.76 | 28.6 | 371 | 214.8 | 0.849 | 185.9 | 0 |
| GMS-11 | 16.00 | 15.80 | 0.00 | 116.03 | 28.8 | 87 | ND | 0.843 | 250.0 | 0 |
a
Data are shown only for sediment depths for which microarray analyses were performed.
b
ND, not determined.