Figure 2
Relative importance of the three environmental variables accounting for conditions and resources from climate, habitat, and soil in explaining species diversity of four taxonomic groups (a–d) and related ecosystem functions (e–h). Upper panels: We conducted variation partitioning (VP) based on generalized additive models (GAM). Venn diagrams show the pure proportions explained exclusively by each predictor, and their share of explained deviance (expl. dev.) due to overlapping effects of pairs of predictors or all three predictors. A negative value indicates that the explained deviance by the predictor overlap is less than that explained separately by the predictors62. Lower panels: Dots present the response of the three selected predictors (same as in the upper panel) against Shannon taxon diversity as a measure of species diversity and the associated ecosystem functions. Lines depict the respective univariate GAM smooth functions with the corresponding explained deviance indicated. NDVI: Normalized Difference Vegetation Index, sd: standard deviation of air temperature and air humidity over time. The reader may refer to the Methods section and the Supplementary Methods for the individual selection procedure of the three predictors for each response. The plant and animal images used in the figure were provided by Cordula Mann and Christiane Enderle.
