Figure 3.
Relationships among the leaf mass per unit area (LMA), leaf lifespan (LLS), and leaf physiology. (a–c) Relationships between the mass-based photosynthetic capacity (Am) and the LMA, LLS and leaf mass-based nitrogen (Nm), respectively. (d–f) Relationships between the nitrogen-based photosynthetic capacity (PNUE) and the LMA, LLS and leaf mass-based nitrogen (Nm), respectively. The data are shown for four evergreen (filled symbols) and a deciduous (open symbol) oak species. Note the log–log scale. The values of rA and rE represent Pearson's correlation coefficients among all of the species and among evergreen species, respectively (**p < 0.01, *p < 0.05, ***p < 0.15). The black and red lines represent regressions with p < 0.15 (as a marginally significant level) among all of the oak species and among the evergreen oak species, respectively. The blue dashed lines represent regressions among the data in the GLOPNET dataset. The bars represent ±1 s.d. (n = 7).