Fig. 6: Factors accounting for variation in soil multifunctionality.
From: Transitions within agroecosystems impact protists diversity and soil multifunctionality
A Structural equation model (SEM) showing the effects of multiple factors on soil multifunctionality. The path widths represent the strength of path coefficient. The model parameters include χ2 = 29.61, df = 21, p = 0.100, CFI = 0.975, and RMSEA = 0.073. CS, cultivation system; NI, soil nutrient availability index; PD-A and PD-R, phylogenetic diversity of abundant and rare taxa, respectively; NMDS1-A and NMDS1-R, the scores in the first axis of non-metric multidimensional scaling (NMDS) of the abundant and rare zOTUs, respectively. B Standardized total effects of the variables used in the SEM. C, D Relationships between phylogenetic diversity and soil multifunctionality (based on multiple-thresholds, i.e., the number of soil functions above a series of sequential thresholds, ranging from 1 to 99% with 1% intervals) for abundant (C) and rare (D) protist taxa. Tmin and Tmax indicate the lowest and highest thresholds whose slopes are significantly different from zero, respectively. Tmde is the threshold with the steepest slope.
