## 2 Experimental Section
### Statistics
\begin{table}
\begin{tabular}{c c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Group**} & \multirow{2}{*}{**Parameter**} & \multirow{2}{*}{**Description**} & \multirow{2}{*}{**Units**} & \multicolumn{4}{c}{**Fagus Systatica**} & \multicolumn{4}{c}{**Picea Abies**} & \multicolumn{4}{c}{**Pinus Systvets**} \\ \cline{5-10}  & & & & **Min Max References** & \multicolumn{1}{c}{**Min Max**} & \multicolumn{1}{c}{**Max**} & \multicolumn{1}{c}{**Reference**} & \multicolumn{1}{c}{**Min**} & \multicolumn{1}{c}{**Max**} & \multicolumn{1}{c}{**References**} \\  & & & & & & & & & & & & & \\ \hline A & BASEFOLRESPFRAC & respiration as fraction of max. & (0–1) & 0.05 & 0.15 & [66] & 0.05 & 0.15 & [66] & 0.05 & 0.15 & [66] +/–0.05 \\  & photosynthesis & intercept of relationship between & - & 0.0 & 130 & [32,66] & 0.0 & 130.0 & [32,66] & 0.0 & 130.0 & [32,66] \\ A & FRTALO\_BASE & slope of relationship between & - & 1.0 & 7.0 & + & 1.0 & 7.0 & + & 1.0 & 7.0 & + \\ A & FRTLOSS\_SCALE & logit and root allocation & & (0–1) & 0.20 & 2.5 & [32,67] & 0.2 & 0.3 & [32,66] & 0.2 & 0.3 & [32,66] \\ A & GRESPFRAC & diffusion & (0–1) & 0.20 & 0.25 & [32,67] & 0.2 & 0.3 & [32,66] & 0.2 & 0.3 & [32,66] \\ A & MFOLOPT & foliage biomass under optimal & kg & & & & & & & & \\  & closed canopy condition & DW\_m\_2 & 0.23 & 0.39 & [68,69] & 1.10 & 1.66 & ++, [70] & 0.39 & 0.96 & [71,72] \\ A & QWODFOLMIN & min. ratio of carbon allocation to & - & 0.3 & 5.0 & + & 0.3 & 5.0 & + & 0.3 & 5.0 & + \\ A & WODFOLMIN & wood and foliage & - & 0.3 & 5.0 & + & 0.3 & 5.0 & + & 0.3 & 5.0 & + \\ A & RESPQ10 & temperature dependency of & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} \\  & leaf respiration & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} \\ A & ROOTMRESPFRAC & fine root maintenance respiration, & - & 0.5 & 1.0 & [32,66] & 0.5 & 1.0 & [32,66] & 0.5 & 1.0 & [32,66] \\ A & WOODMRESPA & wood maintenance respiration, & - & 0.07 & 0.35 & [32,66] & 0.07 & 0.35 & [32,66] & 0.07 & 0.35 & [32,66] \\ A & WOODMRESPA & fraction of allocation & & (0–1) & 0.07 & 0.35 & [32,66] & 0.07 & 0.35 & [32,66] & 0.07 & 0.35 & [32,66] \\  & & & & & & & & & & & \\  & & & & & & & & & & & & \\ N & AMAXB & nitrogen dependency of & CO\_2 & 36.0 & 71.9 & [35,79] & 0.0 & 75.6 & [79, 80, 81] & 0.0 & 75.6 & same as PIAB \\  & photosynthesis & & & & & & & & & & & \\  & & & & & & & & & & & & \\  & & & & & & & & & & & & \\  & & & & & & & & & & & & \\ N & EXPL\_NH4 & exploitation rate of NH4 & \% & 0.00 & 0.50 & +++ & 0.00 & 0.50 & ++ & 0.0 & 0.5 & [40] \\ N & EXPL\_NO3 & exploitation rate of NO3 & \% & 0.00 & 0.35 & +++, [82] & 0.00 & 0.15 & ++ & 0.0 & 0.3 & [40] \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Summary of physiological parameters subject to calibration, description and value ranges. In case no publications were found, we refer to our own parameter adjustments to specific sites. Parameters are grouped by carbon allocation and respiration (A), nitrogen (N), temperature (T) and water availability and light extinction (W_L).