Figure 3.

The proportional contribution of contemporary drought (ecological), and plant drought history (evolutionary) and their interactive effects on soil nutrients. Positive contributions indicate that drought increased the variable (e.g. NO₃⁻ concentrations were higher in dry environments). (a–c) Effects with microbes from dry environments. (d–f) Effects with microbes from wet environments. In (a,d), ecological and evolutionary effects averaged across environments and the strength of their interaction. In (b,e), ecological effects were estimated using only plants from dry evolutionary histories; evolutionary effects were estimated only in dry contemporary environments. In (c,f), ecological effects were estimated using only plants from wet evolutionary histories; evolutionary effects were estimated only in wet contemporary environments. Error bars represent the standard deviations of 10 000 bootstrap estimates.