Fig. 5From: Heat and drought impact on carbon exchange in an age-sequence of temperate pine forestsCorrelations between monthly relative extractable water (REW) anomalies and monthly gross ecosystem productivity (GEP) (a–c), ecosystem respiration (RE) (e–g), and net ecosystem productivity (NEP) (i–k) anomalies in spring (AM), summer (JJAS) and autumn (ON) in the 80-, 45-, and 17-year-old stands. Significant linear regressions at p < 0.01 are shown as solid lines. Significant linear regressions at 0.01 < p < 0.05 are shown as dashed lines. The slope of the linear relationship between daily REW anomalies and daily GEP (d), RE (h) and NEP (l) in each month are shown when the regression was significant at p < 0.05Back to article page