TY - CHAP A1 - Kurth, Winfried A1 - Dzierzon, Helge T1 - LIGNUM: A Finnish tree growth model and its interface to the French AMAPmod database. Y1 - 2002 ER - TY - JOUR A1 - Dzierzon, Helge A1 - Sievänen, Risto A1 - Kurth, Winfried A1 - Perttunen, Jari A1 - Sloboda, Branislav T1 - Enhanced possibilities for analyzing tree structure as provided by an interface between different modelling systems JF - Silva Fennica N2 - In recent years, many different advanced mathematical models and simulation systems for tree and forest growth have been developed. We show a possibility to extend analysis tools for measured and simulated plants using a data interface between the simulation model LIGNUM and the multifunctional software system GROGRA. Both systems were developed by different teams. To demonstrate the enhanced possibilities for analyzing a LIGNUM tree, several examples are given. In these examples three different approaches for analysis are applied to measured and simulated trees: Fractal dimension, deduction of tapering laws, and water potential patterns obtained from simulation of waterflow by the specialized software HYDRA. Conclusions for the interfacing and comparison of different modelling tools are drawn. KW - mathematical models KW - simulation systems KW - tree growth KW - forest growth KW - analysis tools Y1 - 2003 SN - 0037-5330 VL - 37 IS - 1 SP - 31 EP - 44 ER - TY - JOUR A1 - Kurth, Winfried A1 - Oppelt, Armin L. A1 - Dzierzon, Helge A1 - Jentschke, Georg A1 - Godbold, Douglas L. T1 - Structure and fractal dimensions of root systems of four co-occurring fruit tree species from Botswana KW - Fraktal KW - Wurzelsysteme KW - Fraktale Analyse KW - Box Counting Y1 - 2000 ER -