Fig. 1: Sampling locations and environmental coverage analysis.
From: Drivers and trends of global soil microbial carbon over two decades
Sampling locations of the soil microbial carbon data set (n = 762). The extent of the environmental coverage of the global layers used (see Supplementary Table 3) as assessed by the Mahalanobis and Area of applicability methods with outliers represented in blue and red, respectively, and in purple for locations determined as outliers with both methods (see main text for details). Areas in gray are from regions with excluded land cover types (e.g., desert, glaciers). Further analyses were performed with the area in green that could be predicted with high confidence.
