Figure 5.

The relationship between the environment and plant‐microbiome richness. (a) The environmental variables that are most strongly associated with bacterial and fungal richness in the microbiome of North American and European samples. The variables are sorted by median p value. (b) Richness is likewise linked to interactions between environmental variables including Ca and K availability with pH. Each analysis was performed using quasi‐Poisson models that control for the number of reads per sample [Colour figure can be viewed at wileyonlinelibrary.com]