Fig. 1

Relationship (direct approach) between migration lag and a tree longevity, b tree height, c seed weight (we log-transformed seed weight values), and d specific leaf area for the 34 plant species for which we had migration lag information. Only the relationship with seed weight in panel c was significant. We further repeated the analysis with additional seed weight entries (Fig. S1) and conducted a jackknife sensitivity test. Filled circles in grey stand for tree species that are invasive in Europe. Note that statistics are based on a weighted regression and that we did not use any means of depicting the weights of the entries in this figure