Table 1. Summary of observed water parameters and alpha diversity of free-living and particle-attached bacterial communities in the water column.
| Parametera | T [°C] | pH | Salinity [psu] | DO [mg L−1] | NO [µmol L−1] | PO [µmol L−1] |
|---|---|---|---|---|---|---|
| Cowley Islet (CoI) | ||||||
| Min | 21.35 | 8.14 | 34.67 | 6.65 | 4.65 | 0.55 |
| Median | 21.96 | 8.16 | 34.69 | 6.78 | 5.19 | 0.59 |
| Max | 22.13 | 8.25 | 34.72 | 6.83 | 5.80 | 0.68 |
| Groupb | a | a | a | a | a | a |
| Roca Redonda (RoR) | ||||||
| Min | 22.14 | 6.83 | 34.43 | 6.23 | 2.60 | 0.43 |
| Median | 22.80 | 7.22 | 34.53 | 6.60 | 3.59 | 0.49 |
| Max | 23.32 | 7.35 | 34.64 | 8.19 | 4.49 | 0.52 |
| Groupb | b | b | b | a,b | b | b |
| Bolivar Channel (BoC) | ||||||
| Min | 22.39 | 8.25 | 34.38 | 6.09 | 4.76 | 0.60 |
| Median | 23.24 | 8.32 | 34.62 | 6.43 | 5.12 | 0.64 |
| Max | 23.80 | 8.35 | 34.67 | 6.46 | 5.92 | 1.26 |
| Groupb | b | c | b | b | a | a |
Notes.
a
- T
- temperature
- DO
- dissolved oxygen
- NOx−
- nitrate/nitrite
- PO43−
- phosphate
- Chl a
- chlorophyll a
- DOC
- dissolved organic carbon
- TEP
- transparent exopolymers
- POC
- particulate organic carbon
- InvS (FL)
- Inverse Simpson index of free-living bacterial communities
- InvS (PA)
- Inverse Simpson index of particle-attached bacterial communities
b
Lower case letters indicate membership to significantly different groups based on pairwise Wilcoxon posthoc tests between sampling sites (ns, no significant differences among sites based on Kruskal Wallis tests).