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Table 2 Determinants of beta diversity. Results of PERMANOVA testing for the predictors that significantly structure the gut microbiome of geladas, using 10,000 permutations and the Aitchison dissimilarity distance between samples. The R-squared values indicate the amount of between-sample variation explained by each variable.

From: Seasonal shifts in the gut microbiome indicate plastic responses to diet in wild geladas

Factor

R2 (%)

p value

Individuala

20.25

< 0.001

Sequencing depthb

3.77

< 0.001

Unitb

5.84

< 0.001

Cumulative rainfallb

3.30

< 0.001

Minimum temperatureb

0.33

< 0.001

Sexb

0.23

0.012

Ageb

0.19

0.045

  1. aWe first fit a model with individual identity as the only predictor in a PERMANOVA to estimate the sole effect of individual identity at explaining the overall gut composition of samples
  2. bWe then fit a second PERMANOVA model where all other predictors were fit, stratifying on individual identity to control for pseudoreplication of samples from the same individual
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Microbiome

ISSN: 2049-2618

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