Sustainable development is a holistic principle which requires an interdisciplinary, systems-based framework to consider social, economic, cultural and ecological features on various interacting spatio-temporal scales (Hauff 1987). These comprehensive demands can only be met if indirect, chronic and de-localised effects are used as focal elements of the respective investigations and management optimisations (Costanza 2000, Daily 1997, Joergensen 1996, Patten 1992). Thus, besides the broad-spectral spatial and temporal extents, sustainable development also demands for deep “substantial extents”, considering multiple subsystems and elements as well as the interrelations between them.