Fig. 1

Change in net primary productivity (NPP; in megagrams C per hectare per year) in each environmental zone (Metzger et al. 2005) (for abbreviations, see Table 1; color codes as in Fig. 2) over all climate change scenarios for simulations with persistent CO₂ effects (top) and acclimation of photosynthesis to [CO₂] (bottom). The boxplots show the following information: thick line, median; bottom and top of the box, 25th and 75th percentiles; and whiskers, maximum value or 1.5 times the interquartile range of the data depending on which is smaller. Points = outliers larger than 1.5 times interquartile range