Figure 3. Effect of warming and reduced rainfall on estimates of g1 for species grouped by their drought tolerance adaptations into three major groups: i) intolerant (drought index from 1 to 1.84), ii) moderately tolerant (drought index from 2 to 2.88) and iii) tolerant (drought index from 3 to 4) in accordance with Niinemets and Valladares (2006) (for details about drought index see Tables 4 and S1). Panel a show closed canopy (n = 982), and panel b represents open canopy (n = 1604). Whiskers extend to the largest or lowest value but no further than 1.5 times of interquartile range above and below the hinges of the box plot with the median. Any observations outside this range are denoted as individual points. The horizontal line inside the box denotes the median of the values.