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Table 2 Effects of treatments on density, diversity and composition of nest and feather bacterial communities compared to the control

From: Uropygial gland size and composition varies according to experimentally modified microbiome in Great tits

  Total bacterial densities Keratinolytic bacterial densities
Nests Estimate ± SE Df T P Estimate ± SE Df T P
  TSB 0.87 ± 0.38 32 2.30 0.028* 1.36 ± 0.62 32 2.19 0.036*
  Nisin −1.70 ± 0.46 33 −3.67 <0.001*** −2.68 ± 0.73 33 −3.65 <0.001***
Feathers Estimate ± SE Df T P Estimate ± SE Df T P
  TSB 1.64 ± 0.61 36 2.69 0.011* 2.53 ± 0.52 37 4.90 <0.001***
  Nisin 0.87 ± 0.39 34 2.20 0.035* 0.99 ± 0.41 35 2.43 0.021*
  Bacterial diversity Bacterial composition
Nests Estimate ± SE Df T P SumSq Df F P
  TSB 0.60 ± 0.28 30 2.14 0.040* 0.80 30 3.59 0.005**
  Nisin −0.01 ± 0.29 30 −0.02 0.981 0.16 30 0.65 0.715
Feathers Estimate ± SE Df T P SumSq Df F P
  TSB 0.41 ± 0.25 37 1.62 0.113 1.17 37 7.26 0.002**
  Nisin −0.07 ± 0.32 35 −0.23 0.82 0.08 35 0.51 0.767
  1. Significant effects are annotated by *p<0.05, **p<0.01, ***p<0.001.