Fig. 2

Relationship (modelling approach) between migration lag and a tree longevity, b tree height, c seed weight (we log-transformed 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 was significant. To address the relationships, we weighted tree species with their number of observations. The relationship was robust to alternative weighting schemes, such as a weighting with the square root of the number of observations