<div>Legends of figures</div><div>Figure 1. A) Daily precipitation (mm) and air temperature (°C) from 2015
to 2020. Soil volumetric water content at B) 10 cm depth, C) 40 cm
depth, D) 100 cm depth and E) 200 cm depth
for control (C), nutrient
addition (+N), water addition (+W) and co-addition of nutrient and water
(+NW) treatments, from 2015 to 2019. Values within panel A indicate the
annual precipitation.</div><div>Figure 2. (A) Percentage of shrub coverage in 2019 and (B) Percentage of
dead shrub individuals from 2016 to 2019, for control (C), nutrient
addition (+N), water addition (+W) and co-addition of nutrient and water
(+NW) treatments. Bars represent mean +CI (n=5). Different lowercase
letters indicate significant differences between treatments for each
year. Different uppercase letters indicate significant differences
between years. ns = not
significant</div><div>Figure 3. (A) Percentage of total grass coverage and by species: (B)<i>P. humilis</i> , (C) <i>P. speciosa</i> and (D) <i>P. ligularis</i> ,
for control (C), nutrient addition (+N), water addition (+W) and
co-addition of nutrient and water (+NW) treatments. Bars represent mean
+CI (n=5). Different letters indicate significant differences between
treatments. ns = not significant</div><div>Figure 4. ANPP (g m<sup>-2</sup> y<sup>-1</sup>) of (A)
shrubs, (B) grasses and (C) shrubs + grasses, for control (C), nutrient
addition (+N), water addition (+W) and co-addition of nutrient and water
(+NW) treatments. Bars represent mean +CI (n= 5). Different lowercase
letters indicate significant differences between treatments for each
year. Different uppercase letters indicate significant differences
between years</div><div>Figure 5. (A) MSAVI2 vegetation index obtained from Sentinel-2 images
for control (C), nutrient addition (+N), water addition (+W) and
co-addition of nutrient and water (+NW) treatments from July 2019 to
July 2020. Each point corresponds to the index of a pixel within each
plot. The lines correspond to the GAM fitting and the ribbons to the
95% confidence limits. Different letters indicate significant
differences between treatments. (B) MSAVI2 indices for four dates, each
representative of a season (in order: winter, spring, summer, and fall).
Squares represent plots, and each 10x10m pixel is colored according to
MSAVI2 value</div><div>Figure 6. (A) Daily NDVI for control (C), water addition (+W) and
co-addition of nutrient and water (+NW) treatments from July 2019 to
July 2020. The lines correspond to the GAM fitting and the ribbons to
the 95% confidence limits. (B) Boxplots of NDVI for each treatment.
Different letters indicate significant differences between treatments.
Note: data corresponding to +N treatment are missing due to technical
problems with the downward-looking hemispherical sensor</div><div>Figure 7. ANPP (g m<sup>-2</sup> y<sup>-1</sup>) in
relation to water input (ambient + experimental precipitation, mm) for
(A) shrubs, (B) grasses and (C) shrubs + grasses, for control (C),
nutrient addition (+N), water addition (+W) and co-addition of nutrient
and water (+NW) treatments. The points and error bars are the mean and
CI of the statistical analysis shown in figure 5. Different lowercase
letters indicate significant differences between treatments</div>