NPP of beech (a) and Douglas-fir (b) in Freienwalde under the historic climate (dark grey line), the FRW1 scenario realisation (dashed line) and the FRW3 scenario realisation (bold line). For a better comparison the NPP of beech and Douglas-fir in the Freienwalde stand under the FRW3 scenario realisation are displayed together in sub-graphic c (light grey line = Douglas-fir; black line = beech).