Data analysis
The dew point temperature was calculated using long-term meteorological observations. Linear regression was used to test the relationship between plant height and dew amount in the control and warming treatments. To test the warming effect, one-way analysis of variance (ANOVA) and Tukey’s HSD test were used to determine differences in dew amount and duration between the control and warming plots. All statistical analyses were conducted using R 3.2.2 software (R Foundation for Statistical Computing, Vienna, Austria, 2013). Differences were considered significant at P < 0.05 unless otherwise stated.