Table 1.
Water depth, temperature (Temp), salinity (Sal.), suspended particulate matter (SPM), and abundances of lipids in the water column.
| Sample† | Water depth (m) | Temp. (°C) | Sal. (%) | SPM (mg/l) | Core-bGDGTs |
Polar-bGDGTs |
P/(P + C) |
|||
|---|---|---|---|---|---|---|---|---|---|---|
| Sonication (μg/g SPM) | BD (μg/g SPM) | Sonication (μg/g SPM) | BD (μg/g SPM) | Sonication (%) | BD (%) | |||||
| LOWER PR | ||||||||||
| PR-F-9 | 2 | 30.7 | 0.0 | na§ | na | na | na | na | na | na |
| PR-F-8 | 2 | 30.2 | 0.0 | 11.3 | 0.75 | 2.93 | 1.64 | 0.53 | 68.6 | 15.2 |
| PR-F-10 | 2 | 31.3 | 0.0 | 9.5 | 1.06 | 4.28 | 2.00 | 0.24 | 65.4 | 5.2 |
| PR-F-7 | 2 | 30.2 | 0.0 | 17.6 | 0.23 | 1.45 | 0.67 | 0.71 | 74.6 | 32.9 |
| PR-F-6 | 2 | 30.3 | 0.0 | 19.4 | 1.24 | 2.21 | 0.96 | 1.64 | 43.6 | 42.7 |
| PR-F-5 | 2 | 30.2 | 0.0 | 6.4 | 4.02 | 4.95 | 1.03 | 0.23 | 20.5 | 4.5 |
| PR-F-4 | 2 | 30.3 | 0.0 | 20.1 | 0.78 | 0.84 | 0.24 | 1.01 | 23.4 | 54.5 |
| PR-F-3 | 1 | 30.1 | 0.0 | 20.3 | 0.73 | 2.41 | 0.86 | 0.34 | 54.1 | 12.3 |
| PR-F-2 | 1 | 30.4 | 0.0 | 50.7 | 0.45 | 0.95 | 0.52 | 0.97 | 53.2 | 50.6 |
| PR-F-1 | 3 | 29.8 | 0.0 | 28.9 | 1.44 | 4.49 | 1.44 | 1.01 | 50.0 | 18.3 |
| Avg | 30.4 | 0.0 | 20.5 | 1.19 | 2.72 | 1.04 | 0.74 | 50.4 | 26.3 | |
| Std | 0.4 | 0.0 | 13.2 | 1.12 | 1.55 | 0.56 | 0.46 | 18.8 | 19.4 | |
| ESTUARY | ||||||||||
| PR-F-11S | 1 | 30.1 | 1.0 | 14.7 | 0.40 | 0.76 | 0.42 | 0.21 | 51.2 | 21.8 |
| PR-F-11D | 4 | 30.0 | 1.0 | na | na | na | na | na | na | na |
| PR-F-12S‡ | 1 | 31.0 | 0.0 | 126.8 | 0.07 | 0.43 | 0.08 | 0.09 | 54.6 | 18.0 |
| PR-F-12D | 10 | 28.0 | 22.0 | 23.0 | 0.07 | 0.35 | 0.59 | 0.08 | 89.3 | 18.0 |
| PR-F-13S | 1 | 30.5 | 8.0 | 5.7 | 0.09 | 0.43 | 0.76 | 0.12 | 89.5 | 22.5 |
| PR-F-13D | 5 | 28.7 | 20.0 | 25.7 | 0.09 | 0.27 | 0.17 | 0.07 | 65.6 | 20.7 |
| PR-F-14S | 1 | 30.1 | 15.0 | 14.7 | 0.03 | 0.03 | 0.05 | 0.01 | 59.5 | 24.9 |
| PR-F-14D | 17 | 24.2 | 36.0 | 23.0 | 0.02 | 0.07 | 0.04 | 0.02 | 62.1 | 21.6 |
| Avg | 28.8 | 14.7 | 17.8 | 0.12 | 0.32 | 0.34 | 0.08 | 69.5 | 21.6 | |
| Std | 2.2 | 12.6 | 7.5 | 0.14 | 0.27 | 0.30 | 0.07 | 16.1 | 2.3 | |
bGDGTs, branched glycerol dialkyl glycerol tetraethers. Core (C)-bGDGTs and polar (P)-bGDGTs are presented for two extraction methods: sonication and Bligh and Dyer (BD).
†PR-F, Pearl River-filter, which is followed by station number (solid circle in Figure 1); the letter “S” or “D” after station number means “surface” or “deep,” respectively.
‡This sample was collected at the front of Xijiang water in the estuary and was excluded from the calculation of average values for the estuary samples.
§Not available.