Forest biomass production potentials as analysed with the forest ecosystemmodel PICUS for selected stand treatment programmes in Norway spruce (Picea abies [L.] Karst) and European beech (Fagus sylvatica L.) are presented. The scenarios address the question, what the potential biomass productions for the different assortments are within each management strategy and how robust the results are under changing climate conditions. For every forest management strategy, three biomass uses (sawn wood, pulpwood and biofuel including harvest residues, branches and leaves/needles) were investigated with regard to (1) the economic implications for the forest owner, (2) climate change mitigation potential with regards to (i) in situ C storage, (ii) biofuel, and (3) an estimate of sustainable site productivity. Four concepts for forest management were used both under current and changing climatic conditions using the recently hybrid forest patch model PICUS v1.4. The concepts are a current practiced spruce (MS1), an alternative spruce concept mimicking rather low initial density and shorter rotation (MS2), a traditional beech concept (MB1) and an alternative valuable timber production concept (MB2). MS2 and MB2 reduced moderately the total volume production. Extracted volume (harvested extracted commercial volume from commercial thinning and final harvest) was moderately reduced under MS2 but identical under MB2. However, higher annuities were generated by those alternative management concepts. It is unfeasible to increase annuities from timber production and C storage in the forest stand at the same time. In any management concept the climate change scenarios used in this study appear to give a negative effect on both total volume production and extracted volume. . As expected, the potential for biofuel production increased strongly under the intensified extraction. No major differences regarding sustainable site productivity could be detected from the model analysis. However, indepth analysis of model output is required here. Ranking all analysed options for a species shows that no single option is best for all objectives. In spruce the option MS2-E0-variant1 achieved the best average rank over the objectives, in beech option MB2-E1-variant2 was ranked best on average.