2.4 Statistical analysis
Firstly, we inspected bivariate relationships between forest productivity/AGB stability and the individual predictor factors (Fig. S1). We used t -tests to analyze whether the mean temporal stability of AGB or productivity differed between planted forests and natural forests. Secondly, a linear mixed effect model (LME) was used to analyze the trend in AGB stability and productivity over time in planted forest and natural forest, “year” as a fixed effect and “plot” as a random effect. We also analyzed whether there were differences in stability and productivity in the two forest types over time. The mean stability and productivity were z-transformed prior to all analyses.