Fig. 7
From: Heat and drought impact on carbon exchange in an age-sequence of temperate pine forests
Correlations between daily gross ecosystem productivity (GEP), ecosystem respiration (RE), and net ecosystem productivity (NEP) residuals of REW using data from all days with no precipitation (gray dots) and using data from only hot days (red dots) with no precipitation. Hot days were defined as those when daily maximum air temperature, Tmax ≥ 27.5 °C. Significant linear regressions at p < 0.01 are shown as solid lines