Fig. 2: Delineation of regions of global terrestrial surface.
From: Bedrock mediates responses of ecosystem productivity to climate variability

a Four regions are delineated in this study. Region I denotes areas of negative sensitivity; regions with positive sensitivity include Region II where energy limitation is likely, Region III denoting humid tropical regions, and Region IV denoting desert and xeric regions. Detailed definitions of each region are provided in Fig. 1. b Distribution of ecosystem sensitivity values by region. Box plots: box limits show the first quartile (Q1) and third quartile (Q3); central line inside the box represents the median ecosystem sensitivity of a given region; and the segments at ends indicate (Q1–1.5 interquartile range) and (Q3 + 1.5 interquartile range).