Abstract
One of the main uncertainties in long-term assessments of forest growth is the response of carbon allocation to changes in environmental conditions. In this paper, a simple procedure is presented to account for the adjustment of single parameters within the framework of a physiologically based model, regardless of the specific influence. The calculations are based on thebiomass increase of the trees in the previous year and need no further parameterization except the potential speed of the parameter shift. The procedure is applied to evaluate the equilibrium biomass of foliage and fine roots of Scots pine (Pinus sylvestris L.) stands in eastern Germany, considering different degrees of water and nutrient supply. The simulations yielded increasing allocation to fine roots relative to foliage in response to decreasing water as well as to nitrogen supply. The morphological changes, induced by the adjustment procedure, had considerable effects on the simulated output variables of the underlying growth model.
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© 1997 Springer Science+Business Media Dordrecht
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Grote, R. (1997). Long-Term Adjustment of Allocation Parameters in Process-Based Forest Growth Models. In: Mohren, G.M.J., Kramer, K., Sabaté, S. (eds) Impacts of Global Change on Tree Physiology and Forest Ecosystems. Forestry Sciences, vol 52. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-8949-9_38
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DOI: https://doi.org/10.1007/978-94-015-8949-9_38
Publisher Name: Springer, Dordrecht
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