Table 2.

Abundance of amplified bacterial 16S rDNA in a North Atlantic algal bloom as measured by T-RFLP analysis

Sample no.Depth (m)Chlaa (μg liter−1)% Contribution ofb:
Roseobacterc SAR86SAR11CyanocCytophdNAC1-6NAC11-16cNAC60-12dΣ Identified peaks
1 01.0935.05.310.05.604.54.20.465.0
2 101.1137.08.715.07.301.34.51.074.8
3 500.8338.05.713.05.0003.32.567.5
5 2000.1122.75.311.001102.21769.2
6 00.5945.05.014.01.40124.81.483.6
1100.8548.06.022.02.0024.01.685.6
1600.7449.04.418.23.705.24.1084.6
2100.7056.72.718.23.1012.04.0096.7
2600.5350.75.123.11.405.54.2090.0
3100.6052.31.98.84.005.63.9076.5
4701.5742.05.519.06.802.36.91.283.7
48101.5239.05.023.05.505.07.51.386.3
501000.0727.08.416.001503.51685.9
512000.0624.02.84.201602.12473.1
5701.0448.71.716.28.405.23.60.684.4
5901.0352.01.45.722.002.85.50.489.8
605000.058.84.77.401101.021.053.9
  • a Chl, chlorophyll.

  • b Cyano, cyanobacteria; Cytoph,Cytophagales clone NAC60-3. Sample location information is given in Table 3.

  • c Percent abundance of T-RFLP fragment positively correlated with chlorophyll a concentration.

  • d Percent abundance of T-RFLP fragment negatively correlated with chlorophyll a concentration.