Fig. 5: Tunable environmental and operational levers shaping microbial structural keystone expression.

GAMI-Net model identifies the significant main effects and pairwise interactions in predicting the Ks presence ratio. The one-dimensional plots illustrate the marginal effects of individual features, while the two-dimensional plots depict pairwise feature interactions. In the one-dimensional plots, the horizontal axis represents the values of the feature, and the vertical axis indicates its corresponding contribution to the prediction. In the two-dimensional plots, the horizontal and vertical axes represent the values of the two interacting features, respectively. Lighter colors indicate stronger interaction effects on the prediction. Subplot titles indicate the feature names and their importance ratios (IR). Histograms alongside each axis show the data distribution of the corresponding feature. CarBM carbon-based materials, CerBM ceramic-based materials, MinSM mineral substrate materials, ModCM modified composite materials, SynPM synthetic polymeric materials.