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Table 4 The best-fit model for Shannon’s diversity index score, which explained 27% of within-sample diversity variance and had a p value of 1.04 × 10−09. Slopes are given for continuous predictor variables and interactions between continuous and categorical predictors with two levels. Observed trends, from low to high average Shannon’s diversity scores, are given for the categorical predictors

From: The subway microbiome: seasonal dynamics and direct comparison of air and surface bacterial communities

Predictor DF Sum Sq. Mean Sq. F p Slope/trend
Temperature 1 0.089 0.089 17.62 < 0.001 0.0006
Air/surface 1 0.041 0.041 8.20 0.005 Surface > air
Season 3 0.102 0.034 6.75 < 0.001 Winter > autumn > summer > spring
Humidity 1 0.029 0.029 5.74 0.017 − 0.0017
Humidity SD 1 0.005 0.005 1.04 0.309 − 0.1415
Temperature SD 1 0.002 0.002 0.47 0.493 − 0.1018
Time of day 1 0.002 0.002 0.43 0.514 − 0.0001
Indoor/Outdoor 1 0.000 0.000 0.000 1.000 Outdoor > indoor
Temperature SD: temperature 1 0.097 0.097 19.11 < 0.001 − 0.0130
Temperature: air/surface 1 0.051 0.051 10.02 0.002 − 0.0047
Time: indoor/outdoor 1 0.029 0.029 5.75 0.017 0.0005
Humidity SD: season 3 0.061 0.020 4.04 0.008  
Time: season 3 0.034 0.011 2.24 0.085  
Season: indoor/outdoor 3 0.029 0.010 1.91 0.130  
Humidity SD: humidity 1 0.005 0.005 1.01 0.316 0.0011
Temperature SD: season 3 0.006 0.002 0.37 0.773  
Humidity SD: temperature 1 0.000 0.000 0.08 0.772 0.0060
Temperature SD: time of day 1 0.000 0.000 0.00 0.990 0.0004
Residuals 209 1.056 0.005