Simulation von bewirtschaftungsstrategien im realwaldmodell "Deutschland"

The aim of this study was to simulate the effects of forest management on the forest structure and the economic condition of forest enterprises in a computer model. Characteristic forest structures of different regions were derived from existing site and inventory data and presented in representative forest estate models. These consist of 200 model stands which are described in terms of one principal tree species and one secondary and one tertiary admixed species. In addition, the model stands are allocated to a particular age class and a state of thinning and regeneration. The site characteristics comprise water supply, altitude, grade of continentality and nutrient supply. The generation of forest estate models can be applied to various spatial units (e.g. forest growth regions, federal states, the whole of Germany). To project the stands of the forest estate model into the future, the forest growth simulator SILVA 2.2 was integrated in the newly developed forest scenario model "ActioSilva". Simulated harvesting and regeneration at stand level are analysed comprehensively within the forest estate model. Three prototypical management strategies open up room for manoeuvre. The aims of the management strategies are: - The maximisation of profit, - The highest net financial yield of the forest or - The highest net financial yield of the forest using semi-natural management (geared to emulating natural forest dynamics) Using the forest estate model "Germany" as an example, the forest scenario model "ActioSilva" projects the development of the forest estate for the three described management strategies over a simulation period of 30 years under two climate scenarios. The results indicate considerable differences with regard to the combination of tree species, standing stocks, the average annual cut and the net revenue from the wood.