TABLE 2.

Results of standardized redundancy analysis with the Monte Carlo permutation test (999 unrestricted permutations) performed for the R-BT065 bacteria, including the absolute numbers as well as the relative proportions in the total bacteria and in the total Betaproteobacteriaa

Explanatory variableFP
pH71.90.0001
Conductivity55.20.0001
A25057.40.0001
DOC concn12.40.001
A250/A36517.30.0001
A254/DOC53.30.0001
Altitude10.60.003
Oxygen concn4.70.013
Temperature3.20.09
Chl-a concnbNSc
Total phosphorus concnbNS
Particulate phosphorus concnbNS
Dissolved reactive phosphorus concnbNS
Particulate organic carbon concnbNS
  • a The analysis involved 122 samples from 102 habitats. The model based on all variables explains 61% of the variability in the proportions of the R-BT065 bacteria; when only nonautocorrelating explanatory variables (bold type) were taken into account, the model explains 55.3% of the variability.

  • b Parameter measured only for 51 samples collected during 2008.

  • c NS, not significant.