Table 2.
In situ average contribution to total bacterial abundance ± standard deviation of the different bacterioplankton groups represented as percentages of DAPI-positive cells in the different experiments of this study (2017) and in other years at the BBMO.
| Group | Winter (Feb 2017) | Spring (April 2017) | Summer (July 2017) | Fall (Nov 2017) | Averagea |
|---|---|---|---|---|---|
| Eubacteria | 73.7 | 76.8 ± 2.2 | 52.1 ± 2.2 | 73.3 | 74.1 ± 10.2 |
| Bacteroidetes | 15.9 | 12.9 ± 1.0 | 8.4 ± 1.1 | 11.9 | 11.6 ± 3.0 |
| Rhodobacteraceae | 4.5 | 3.1 ± 1.4 | 3.0 ± 0.1 | 2.4 | 3.6 ± 1.9 |
| SAR11 | 43.5 | 38.9 ± 1.6 | 35.0 ± 6.7 | 45.1 | 27.7 ± 14.1 |
| Gammaproteobacteria | 2.0 | 3.2 ± 0.6 | 3.3 ± 1.3 | 5.8 | 7.7 ± 11.0 |
| Alteromonadaceae | 1.9 | 0.1 ± 0.0 | 2.6 ± 0.4 | 4.3 | 2.0 ± 1.6 |
| NOR5/OM60 | 1.2 | 0.7 ± 0.4 | 2.0 ± 0.5 | 1.7 | 2.4 ± 1.5 |
| AAP | 8.9 | 4.9 ± 1.8 | 16.7 ± 5.0 | 10.4 | 6.0 ± 1.4 |
Bacterioplankton groups were detected with specific HRP-probes Eub 338-I, -II, -III (Eubacteria), CF319a (Bacteroidetes), Ros537 (Rhodobacteraceae), SAR11-441R (SAR11 clade), Gam42a (Gammaproteobacteria), Alt1413 (Alteromonadaceae) and NOR5-730 (NOR5/OM60 cluster). AAP: aerobic anoxygenic phototrophs, determined by infrarred microscopy.
aData from Ferrera et al4, Sánchez et al5, and Alonso-Sáez et al10.