Fig. 2

(a) Global distribution of data points of the PolLimCrop dataset; blue circles size represent the total number of entries for the different regions; green areas represent cropland areas in 2020²⁵. (b) Total number of entries (indicated with blue bars; left axis) of the PolLimCrop dataset and the total number of studies (indicated with a green line; right axis) along the years (from 1950 to 2020). (c) Distribution of data points based on pollen limitation values; values are given in proportion (0 represents no pollen limitation, and 1 represents maximum pollen limitation); the dashed line indicates the overall mean value of pollen limitation of the animal-pollinated crops included in the PolLimCrop dataset. (d) Number of entries for the 10 animal-pollinated crops with the highest representation in the studies included in the PolLimCrop dataset (blue bars), with the total number of studies per crop being indicated below each bar (in square brackets).