Compartmentalization and energy channels within the soil animal food web investigated by stable isotope (13C and 15N) and fatty acid analyses Forest soil food webs are complex and heterogeneous systems. Trophic relationships are hidden from direct observation due to small size of soil animals cryptic habitat and complex mixtures of basal resources that are not easily separable. Despite the fundamental role of aboveground belowground feedbacks and the major importance of decomposition processes for ecosystem functioning the decomposer subsystem has become only recently the subject of ongoing research. In this thesis we investigated the trophic compartmentalization of the decomposer food web and traced energy fluxes to different... Waldboden Nahrungsnetze sind komplexe und heterogene Systeme. Trophische Beziehungen sind aufgrund der geringen Größe der Bodentiere und deren kryptischer Lebensweise sowie des komplexen Gemisches basaler Ressourcen schwer ergründbar. Das Zersetzersystem wird trotz seiner fundamentalen Rolle in Zersetzungsprozessen und für das Funktionieren von...