Figure 3. Relationships between the difference in predawn and
midday leaf water potential (ΔΨ) and the predawn leaf
water potential (Ψpd) for P. nigra , P.
sylvestris , Q. faginea, and Q. ilex in monospecific
(red), monofunctional (orange), multifunctional (light blue) and
four-species mixture plots (dark blue). Lines represent linear
regressions with significant relationships across all species diversity
levels.