Figure 1

Overall growth trend across all species covered by our data (5815 observations from 642 plots from 415 experiments). Lines: Model predictions for the calendar years 1900, 1975, and 2015, based on the fixed effects of the fitted Eq. (7) (see Supplementary Table 5). The age coverage of the model prediction was cut according to the range of stand establishment years covered by the data. Note that, for the sake of clarity, the diagram’s vertical axis was cut at 30 Mg/ha/a which omits six observations reaching up to 40.7 Mg/ha/a.