Assessment of the effect of fungus-feeding collembola and nematodes on the development of the extraradical mycelium of arbuscular mycorrhizal fungi and the cost/benefit-ratio of the symbiosis.

Application of phospholipid fatty acid analysis (PFLA) to investigate the interaction of collembola from different functional groups (herbivore/fungivore) with arbuscular mycorrhizal and saprophytic fungi.

Characterization of the arbuscular mycorrhiza fungal extraradical mycelium as a food source for soil animals in long-term field fertilization experiments at the IBDF.