Figure 7. Relationships between the predawn leaf water
potential (Ψpd), the difference in predawn and midday
leaf water potential (ΔΨ), the light-saturated stomatal
conductance (gs), and the belowground community-level
water source partitioning for P. nigra (brown), P.
sylvestris (beige), Q. faginea (light green) and Q. ilex(dark green) in the four-species mixtures (mean ± SE per plot and date).
Lines represent significant linear regressions for each
species.