Table 2.
Values of alpha-diversity estimates.
| Sample ID | Depth (m) | OTUs | Chao1 | Shannon | Simpson |
|---|---|---|---|---|---|
| PB76A.min.bot | 208 | 107.70a | 204.02a | 5.14a | 0.94a |
| PB49.sur | 5 | 69.50 | 110.07 | 3.99 | 0.87 |
| PB49.max | 30 | 71.30 | 122.96 | 3.96 | 0.83 |
| PB49.min.bot | 720 | 149.90 | 261.03 | 5.90 | 0.96 |
| PB53.sur | 5 | 63.40 | 85.05 | 4.00 | 0.87 |
| PB53.max | 34 | 70.70 | 115.84 | 4.08 | 0.85 |
| PB53.min | 613 | 155.40 | 292.60 | 5.99 | 0.97 |
| PB53.bot | 800 | 167.80 | 288.59 | 6.17 | 0.97 |
| PB57.sur | 5 | 74.80 | 116.30 | 4.64 | 0.92 |
| PB57.max | 10 | 95.70 | 164.51 | 4.88 | 0.92 |
| PB57.min | 330 | 129.10 | 238.80 | 5.47 | 0.94 |
| PB57.bot | 553 | 127.10 | 231.39 | 5.57 | 0.95 |
| PB59.sur.max | 5 | 69.70 | 92.46 | 4.73 | 0.94 |
| PB59.min | 225 | 113.50 | 197.04 | 5.00 | 0.91 |
| PB59.bot | 1848 | 135.10 | 232.67 | 5.57 | 0.94 |
| PB62.sur.max | 5 | 82.00 | 122.95 | 4.72 | 0.92 |
| PB62.min | 700 | 140.20 | 244.93 | 5.82 | 0.96 |
| PB62.bot | 947 | 158.60 | 269.59 | 6.11 | 0.96 |
| PB66.sur | 6 | 82.20 | 123.46 | 4.75 | 0.92 |
| PB66.max | 35 | 77.10 | 114.77 | 4.57 | 0.91 |
| PB66.min | 250 | 113.90 | 191.64 | 5.07 | 0.91 |
| PB66.bot | 2129 | 147.30 | 247.99 | 5.83 | 0.95 |
| PB72.sur | 5 | 68.90 | 104.68 | 3.89 | 0.81 |
| PB72.max | 15 | 81.70 | 128.82 | 4.58 | 0.90 |
| PB72.min.bot | 2188 | 146.80 | 278.32 | 5.67 | 0.95 |
| PO01.01.sur.max | 5 | 64.10 | 106.51 | 3.84 | 0.81 |
| PO01.01.min | 828 | 118.30 | 189.87 | 5.47 | 0.95 |
| PO01.21B.sur.max | 5 | 71.20 | 85.13 | 4.93 | 0.94 |
| PO01.21B.min | 300 | 103.40 | 165.85 | 5.24 | 0.94 |
| PO01.21B.bot | 3012 | 135.70 | 257.28 | 5.52 | 0.94 |
| T-TESTb | |||||
| Average “deep” | 134.36 | 236.98 | 5.60 | 0.95 | |
| Average “shallow” | 74.75 | 113.82 | 4.40 | 0.89 | |
| t-statistics | 11.18 | 11.24 | 8.47 | 4.57 | |
| P-value | <0.0001 | <0.0001 | <0.0001 | 0.0003 | |
Sur, surface; max, maximum of dissolved oxygen; min, minimum of dissolved oxygen; bot, near the bottom.
a
All values are averages based on 10 rarefactions at 594 sequences per sample.
b
Results of Student t-test, testing the null hypothesis of equality of means in “deep” samples (oxygen minimum or near the bottom) vs. “shallow” samples (surface or oxygen maximum).