Fig. 3: Effects of vapor pressure deficit (VPD) and soil moisture (SM) on iWUE. | Nature Communications

Fig. 3: Effects of vapor pressure deficit (VPD) and soil moisture (SM) on iWUE.

From: Global distribution and changes of leaf-level intrinsic water use efficiency and their responses to water stress

Fig. 3: Effects of vapor pressure deficit (VPD) and soil moisture (SM) on iWUE.

Spatial distribution of partial correlation coefficients of VPD and SM controlling changes in iWUE (a). Proportion of the area where iWUE is predominantly controlled by VPD or SM (b). Proportion of the area controlled by VPD or SM across eight plant functional types (PFTs, c). Proportion of the area controlled by VPD or SM along an aridity gradient (d). PFTs include ENF (evergreen needleleaf forests), EBF (evergreen broadleaf forests), DNF (deciduous needleleaf forests), DBF (deciduous broadleaf forests), MF (mixed forests), Shrublands, Savannas and Grasslands. Non-natural vegetation areas and deserts with less than 10% vegetation coverage were masked, as were grid units dominated by C4 vegetation.

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