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Table 1 Permutational multivariate analysis of variance (PERMANOVA) results showing the influence of company, age, performance and their interactions on the bacterial community structure in excreta and dust samples

From: Microbial taxa in dust and excreta associated with the productive performance of commercial meat chicken flocks

Sample type Source df Sum of squares Pseudo-F R2 P value PERMDISP P value
Excreta Company 1 167,120 91.10 0.21 0.001  < 0.001
  Age 4 81,418 11.10 0.10 0.001 0.008
  Performance 1 10,863 5.92 0.01 0.001 0.03
  Age × company 4 39,511 5.38 0.05 0.001  
  Company × performance 1 12,723 6.94 0.02 0.001  
  Age × performance 4 14,605 1.99 0.02 0.001  
  Performance × age × company 4 19,093 2.60 0.02 0.001  
  Residuals 238      
Dust Company 1 29,643 21.94 0.11 0.001 0.003
  Age 4 35,962 6.65 0.13 0.001  < 0.001
  Performance 1 9151.6 6.77 0.03 0.001 0.11
  Age × company 4 15,488 2.87 0.06 0.001  
  Company × performance 1 4559.6 3.37 0.02 0.001  
  Age × performance 4 8810.5 1.63 0.03 0.001  
  Performance × age × company 4 11,313 2.09 0.04 0.001  
  Residuals 111      
  1. Df, degrees of freedom; R2, proportion of the variance explained by each model; PERMDISP, permutational analyses of multivariate dispersion