marginally significantp ≤ 0.1
A simple linear regression analysis showed marginally significant (control, 0.05 ≤ p ≤ 0.1, Figure 4 A, Table 2 ) or significant (+25%, +50%, +75%, and +100% water addition treatment, all p ≤ 0.05, Figure 4 B–E, Table 2 ) downward quadratic correlations between OSR and the summer mean temperature (T sum ).