TABLE 1.
Environmental variables, total abundance of DAPI-positive cells, and bacterial community compositions at coastal sampling stations
| Location (date, day/mo/yr) | Station (depth, m) | Water temp (°C) | Chlorophyll aa (μg liter−1) | Total abundance of DAPI-positive cells (106 cells ml−1) | % of total bacterial abundanceb (avg ± SE, n = 10)
|
|||||
|---|---|---|---|---|---|---|---|---|---|---|
| Eub | Alpha | Beta | Gamma | CF | Σ | |||||
| Otsuchi Bay (22/05/01) | A (0) | 12.9 | 1.77 | 1.4 | 57 ± 1 | 33 ± 1 | 4 ± 1 | 8 ± 1 | 13 ± 1 | 58 |
| A (20) | 9.6 | 1.65 | 1.6 | 57 ± 1 | 61 ± 1 | 6 ± 1 | 10 ± 1 | 18 ± 1 | 95 | |
| B (0) | 12.9 | 2.42 | 1.8 | 54 ± 2 | 17 ± 1 | 8 ± 1 | <1 | 6 ± 1 | 33 | |
| B (40) | 8.7 | 3.09 | 1.5 | 43 ± 2 | 17 ± 1 | 3 ± 1 | 7 ± 1 | 4 ± 1 | 31 | |
| C (0) | 10.4 | 1.18 | 1.5 | 51 ± 2 | 33 ± 1 | <1 | 7 ± 1 | 17 ± 1 | 57 | |
| C (65) | 8.5 | 1.68 | 1.1 | 22 ± 1 | 33 ± 1 | <1 | <1 | 8 ± 1 | 41 | |
| Otsuchi Bay (24/05/02) | A (0) | 13.4 | 1.92 | 1.5 | 54 ± 1 | 39 ± 1 | <1 | 6 ± 0 | 13 ± 1 | 58 |
| B (0) | 13.4 | 2.56 | 1.5 | 51 ± 2 | 46 ± 1 | <1 | 8 ± 1 | 12 ± 1 | 66 | |
| C (0) | 11.7 | 1.85 | 1.2 | 23 ± 2 | 22 ± 3 | <1 | <1 | <1 | 26 | |
| Sagami Bay (17/07/02) | 1 (0) | 21.9 | 3.43 | 1.5 | 49 ± 1 | 36 ± 1 | <1 | 6 ± 1 | 8 ± 1 | 50 |
| 1 (100) | 16.0 | 0.09 | 0.3 | 27 ± 2 | 35 ± 2 | <1 | 8 ± 1 | 7 ± 1 | 50 | |
| Off Kuroshio (18/07/02) | 4 (0) | 27.6 | 0.18 | 0.7 | 17 ± 1 | 27 ± 1 | <1 | <1 | <1 | 27 |
| 4 (100) | 22.4 | 0.12 | 0.3 | 14 ± 1 | 23 ± 1 | <1 | <1 | 5 ± 1 | 28 | |
| Total | 40 ± 5 | 32 ± 4 | 3 ± 2 | 5 ± 1 | 9 ± 2 | 49 ± 6 | ||||
a
Fluorometric measurement after the extraction of pigments with N,N-dimethylformamide (H. Ogawa and H. Fukuda, personal communication).
b
Bacteria were classified by using rRNA binding oligonucleotide probes specific for eubacteria (Eub), α-proteobacteria (Alpha), β-proteobacteria (Beta), γ-proteobacteria (Gamma), and the Cytophaga-Flavobacter cluster (CF). Σ, sum of four phylogenetic bacterial groups.