Fig. 3: Structural equation models identifying the direct (full lines) and indirect (dotted lines) influence of different predictors on the structure of bacteria, fungi and protistan communities in maize soils.
From: The neglected role of micronutrients in predicting soil microbial structure
a bacteria, (b) fungi, (c), protist. Black lines indicate significant and numbers adjacent to lines were indicative of the effect size of the relationship. We grouped the climatic and edaphic properties into the same box in the model for graphical simplicity, which did not represent latent variables. R2 denotes the proportion of variance explained. Red arrows represented positive paths, and green arrows represented negative paths. Significance levels were as follows: *p < 0.05, **p < 0.01, and ***p < 0.001. The total standardized effects on SEM on the structure of microbial communities were calculated as sum of the direct and indirect effects. Information about our a priori model was provided in Supplementary Fig. 8. TZn total zinc, AZn available zinc, TFe total iron, AFe available iron, TCu total copper, ACu available copper, TMn total manganese, AMn available manganese, CEC cation exchange capacity.
