## 6 Conclusions
Figure A8: Scatterplot of the standardised residuals and the standardised predicted values using the natural logarithm of N deposition for the class grasslands and the year 2000. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline  & \multicolumn{6}{c}{**Croplands**} \\ \cline{2-7}  & \multicolumn{2}{c}{**GPP 2000**} & \multicolumn{2}{c}{**GPP 2007**} & \multicolumn{2}{c}{**GPP 2010**} \\ \hline  & \multicolumn{2}{c}{**Pearson Correlation**} & \multicolumn{2}{c}{**95\% CI**} & \multicolumn{2}{c}{**Pearson Correlation**} & \multicolumn{2}{c}{**95\% CI**} & \multicolumn{2}{c}{**Pearson Correlation**} & \multicolumn{2}{c}{**95\% CI**} \\ \hline
**Ln N dep** & 0.823 \({}^{**}\)\({}^{**}\)\(\pm\) 0.006 & 0.811\({}^{**}\)\(\ldots\) 0.833 & 0.798 \({}^{**}\)\(\pm\) 0.006 & 0.786 \({}^{**}\)\(\ldots\) 0.811 & 0.813 \({}^{**}\)\(\pm\) 0.006 & 0.801 \({}^{**}\)\(\ldots\) 0.824 \\
**Temp** & 0.741 \({}^{**}\)\(\pm\) 0.008 & 0.724 \({}^{**}\)\(\ldots\) 0.756 & 0.749 \({}^{**}\)\(\pm\) 0.008 & 0.734 \({}^{**}\)\(\ldots\) 0.763 & 0.748 \({}^{**}\)\(\pm\) 0.008 & 0.733 \({}^{**}\)\(\ldots\) 0.763 \\
**Precip** & \(-0.220\)\({}^{**}\)\(\pm\) 0.016 & \(-0.250\)\({}^{**}\)\(\ldots\) 0.190 & 0.059 \({}^{**}\)\(\pm\) 0.017 & 0.026 \({}^{**}\)\(\ldots\) 0.092 & \(-0.035\)\({}^{**}\)\(\pm\) 0.017 & \(-0.069\)\({}^{**}\)\(\ldots\) 0.001 \\
**Sunsh** & \(-0.121\)\({}^{**}\)\(\pm\) 0.019 & \(-0.158\)\({}^{**}\)\(\ldots\) 0.086 & \(-0.233\)\({}^{**}\)\(\pm\) 0.018 & \(-0.270\)\({}^{**}\)\(\ldots\) 0.197 & \(-0.291\)\({}^{**}\)\(\pm\) 0.018 & \(-0.325\)\({}^{**}\)\(\ldots\) 0.256 \\ \hline \hline \end{tabular}
\end{table} 
Table 10: Pearson’s correlation between GPP: Gross primary productivity and Ln N dep: Natural logarithm of N deposition, Temp: Temperature, Precip: Precipitation, and Sunsh: Sunshine, based on a bootstrap of 1000 samples per land cover class and year. \({}^{**}\) Statistically significant \(p<0.01\). \begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & \multicolumn{6}{c}{**Croplands**} \\ \cline{2-7}  & \multicolumn{2}{c}{**GPP 2000**} & \multicolumn{2}{c}{**GPP 2010**} \\ \hline  & \multicolumn{2}{c}{**GPP 2000**} & \multicolumn{2}{c}{**GPP 2010**} \\ \hline  & \multicolumn{2}{c}{**Pearson Correlation**} & \multicolumn{2}{c}{**95\% CI**} & \multicolumn{2}{c}{**Pearson Correlation**} & \multicolumn{2}{c}{**95\% CI**} \\ \hline
**N dep** & 0.664 \({}^{**}\)\(\pm\) 0.011 & 0.643 \({}^{**}\)\(\ldots\) 0.687 & 0.615 \({}^{**}\)\(\star\)\(\pm\) 0.013 & 0.590 \({}^{**}\)\(\ldots\) 0.640 & 0.588 \({}^{**}\)\(\pm\) 0.013 & 0.560 \({}^{**}\)\(\ldots\) 0.616 \\
**Temp** & 0.527 \({}^{**}\)\(\pm\) 0.015 & 0.499 \({}^{**}\)\(\ldots\) 0.554 & 0.487 \({}^{**}\)\(\pm\) 0.016 & 0.455 \({}^{**}\)\(\ldots\) 0.518 & 0.477 \({}^{**}\)\(\pm\) 0.016 & 0.445 \({}^{**}\)\(\ldots\) 0.508 \\
**Precip** & \(-0.383\)\({}^{**}\)\(\pm\) 0.018 & \(-0.418\)\({}^{**}\)\(\ldots\) 0.347 & \(-0.164\)\({}^{**}\)\(\ldots\) 0.023 & \(-0.208\)\({}^{**}\)\(\ldots\) 0.015 & \(-0.236\)\({}^{**}\)\(\pm\) 0.021 & \(-0.276\)\({}^{**}\)\(\ldots\) 0.195 \\
**Sunsh** & \(-0.243\)\({}^{**}\)\(\pm\) 0.018 & \(-0.278\)\({}^{**}\)\(\ldots\) 0.207 & \(-0.307\)\({}^{**}\)\(\pm\) 0.019 & \(-0.346\)\({}^{**}\)\(\ldots\) 0.268 & \(-0.387\)\({}^{**}\)\(\pm\) 0.016 & \(-0.419\)\({}^{**}\)\(\ldots\) 0.357 \\ \hline \hline \end{tabular}
\end{table} 
Table 21: [PERSON]’s correlation between GPP: Gross primary productivity and N dep: N deposition (natural logarithm used only for the year 2000), Temp: Temperature, Precip: Precipitation, and Sunsh: Sunshine, based on a bootstrap of 1000 samples per land cover class and year. \({}^{**}\) Statistically significant \(p<0.01\).