Fig. 1: Global distribution of sampling sites of observations for estimating microbial nutrient use efficiency in soil.
From: Global patterns and drivers of soil microbial nitrogen and phosphorus use efficiency
a Distribution of sampling sites in climate space following the Whittaker biome framework, defined by mean annual temperature (MAT, °C) and mean annual precipitation (MAP, cm). Each point represents an individual observation included in the dataset. b Geographic distribution of sampling sites included in this study. Circles represent microbial nitrogen use efficiency (NUE), and triangles represent microbial phosphorus use efficiency (PUE). Colors indicate biome categories assigned according to the MODIS land cover classification (IGBP scheme). Coordinates are displayed in geographic projection (WGS84). Gray areas indicate regions without sampling data.
