Figure 1.

Microclimate during the drought experiment: (a) air temperature (T_air; in °C 0.5 h⁻¹) and precipitation (prec; in mm d⁻¹); (b) soil temperature (T_soil; in °C 0.5 h⁻¹) and (c) volumetric soil water content (SWC; in %) at 5 (solid lines) and 10 cm soil depth (dotted lines) in control (black) and drought (grey) plots. Arrows with lowercase letters in (c) indicate dates of action: ‘a’ marks the beginning of the drought treatment; ‘b’, ‘c’ and ‘d’ indicate dates of pulse-labelling; ‘e’ indicates mowing and ‘f’ indicates rewetting and thus the end of the drought treatment.