Online Resource 1. Results from PLS regressions after NIRS analyses, parameters of models chosen for estimation of species distribution (PC = principal component, RMSEC = residual mean square error of calibration, RMESP = residual mean square error of prediction).

site / tree species / Math. treatment / PC / RMSEC / R2 / RMESP / R2
Kaltenborn / spruce / no treatment / 14 / 7.89 / 0.87 / 13.15 / 0.65
Savitzky-Golay / 14 / 8.36 / 0.85 / 13.21 / 0.64
mean normalisation / 12 / 9.20 / 0.82 / 14.09 / 0.64
peak normalisation / 15 / 7.20 / 0.89 / 14.29 / 0.61
1/x weighted data / 18 / 5.89 / 0.92 / 12.28 / 0.69
Douglas fir / no treatment / 13 / 8.42 / 0.88 / 13.82 / 0.69
Savitzky-Golay / 13 / 8.79 / 0.87 / 13.84 / 0.68
mean normalisation / 12 / 8.85 / 0.87 / 13.15 / 0.71
peak normalisation / 12 / 9.40 / 0.85 / 13.21 / 0.70
1/x weighted data / 17 / 7.23 / 0.91 / 11.49 / 0.77
beech / no treatment / 12 / 9.86 / 0.80 / 11.51 / 0.78
Savitzky-Golay / 13 / 8.72 / 0.81 / 11.39 / 0.78
mean normalisation / 11 / 9.59 / 0.81 / 11.40 / 0.74
peak normalisation / 12 / 9.41 / 0.82 / 11.36 / 0.75
1/x weighted data / 16 / 8.94 / 0.84 / 10.33 / 0.78
oak / no treatment / 12 / 4.21 / 0.95 / 6.46 / 0.93
Savitzky-Golay / 13 / 4.39 / 0.93 / 6.91 / 0.93
mean normalisation / 14 / 4.35 / 0.95 / 6.47 / 0.93
peak normalisation / 12 / 4.76 / 0.94 / 6.24 / 0.93
1/x weighted data / 16 / 4.72 / 0.95 / 5.92 / 0.94
non-woody / no treatment / 12 / 6.41 / 0.94 / 7.87 / 0.91
Savitzky-Golay / 10 / 5.99 / 0.95 / 7.84 / 0.92
mean normalisation / 11 / 6.21 / 0.94 / 7.34 / 0.92
peak normalisation / 10 / 6.41 / 0.94 / 7.61 / 0.91
1/x weighted data / 16 / 5.12 / 0.95 / 5.92 / 0.94
Satakunta / spruce / no treatment / 16 / 4.49 / 0.95 / 11.31 / 0.76
Savitzky-Golay / 16 / 6.62 / 0.91 / 11.00 / 0.77
mean normalisation / 14 / 5.87 / 0.93 / 11.25 / 0.76
peak normalisation / 15 / 6.37 / 0.92 / 12.04 / 0.73
1/x weighted data / 15 / 5.73 / 0.94 / 8.00 / 0.88
pine / no treatment / 15 / 6.67 / 0.91 / 13.89 / 0.64
Savitzky-Golay / 14 / 8.30 / 0.87 / 14.66 / 0.61
mean normalisation / 13 / 8.77 / 0.85 / 13.89 / 0.64
peak normalisation / 14 / 8.69 / 0.86 / 15.09 / 0.58
1/x weighted data / 17 / 5.45 / 0.94 / 12.02 / 0.73
birch / no treatment / 13 / 5.81 / 0.94 / 8.47 / 0.88
Savitzky-Golay / 12 / 6.88 / 0.92 / 8.99 / 0.87
mean normalisation / 12 / 5.85 / 0.94 / 9.14 / 0.86
peak normalisation / 12 / 6.17 / 0.93 / 8.96 / 0.87
1/x weighted data / 18 / 5.89 / 0.94 / 7.07 / 0.92
larch / no treatment / 15 / 5.32 / 0.94 / 10.69 / 0.79
Savitzky-Golay / 15 / 5.79 / 0.93 / 10.83 / 0.79
mean normalisation / 14 / 6.23 / 0.93 / 11.85 / 0.75
peak normalisation / 15 / 6.25 / 0.92 / 12.73 / 0.71
1/x weighted data / 20 / 6.16 / 0.93 / 8.91 / 0.86
alder / no treatment / 13 / 6.25 / 0.93 / 9.47 / 0.85
Savitzky-Golay / 14 / 5.35 / 0.95 / 8.92 / 0.87
mean normalisation / 12 / 6.01 / 0.94 / 8.77 / 0.87
peak normalisation / 13 / 6.27 / 0.93 / 10.38 / 0.82
1/x weighted data / 14 / 4.16 / 0.97 / 6.92 / 0.92