Dr Simone Härri is a postdoctoral research fellow, funded by the Swiss NSF. She did her Ph.D. at the University of Zürich (2007) where she worked with Christine Müller on the interactions between perennial ryegrass, the endophytic fungus Neotyphodium lolii and aphids, parasitoids and hyperparsitoids. At Guelph, Simone is continuing her work on understanding the roll of endophytes in mediating higher trophic interactions.
Zheng, C., Weisser, W. W, Härri, S. A. & Ovaskainen, O. 2009 Hierarchical metapopulation dynamics of two aphid species on a shared host plant. The American Naturalist, 174, 331-341.
Bieri, A., Härri, S. A., Vorburger, C. & Müller, C. B. 2009. Aphid genotypes vary in their response to the presence of fungal endosymbionts in host plants. Journal of Evolutionary Biology, 22, 1775-1780.
Härri, S.A. Krauss, J. & Müller, C.B. 2009. Extended larval development time for aphid parasitoids in the presence of plant endosymbionts. Ecological Entomology, 34, 20-25..
Härri, S.A. Krauss, J. & Müller, C.B. 2008. Trophic cascades initiated by fungal plant endosymbionts impair reproductive performance of parasitoids in the second generation. Oecologia, 157, 399-407
Härri, S.A. Krauss, J. & Müller, C.B. 2008. Fungal endosymbionts of plants reduce lifespan of an aphid secondary parasitoid and influence host selection. Proceedings of Royal Society B: Biological Sciences, in press.
Züst, T., Härri, S.A. & Müller, C. B. 2008. Endophytic fungi decrease available resources for the aphid Rhopalosiphum padi and impair their ability to induce defences against predators. Ecological Entomology, 33, 80-85.
Härri, S.A., Krauss, J. & Müller, C. B. 2008. Natural enemies act faster than endophytic fungi in population control of cereal aphids. Journal of Animal Ecology, 77, 605-611.
Krauss, J., Härri, S.A., Bush, L., Husi, R., Bigler, L., Power, S.A., & Muller, C.B. (2007). Effects of fertilizer, fungal endophytes and plant cultivar on the performance of insect herbivores and their natural enemies. Functional Ecology, 21, 107-116.
Meister, B., Krauss, J., Härri, S.A., Schneider, M.V., & Muller, C.B. (2006). Fungal endosymbionts affect aphid population size by reduction of adult life span and fecundity. Basic and Applied Ecology, 7, 244-252.
Weisser, W.W., & Härri, S.A. (2005). Colonisations and extinctions at multiple spatial scales: a case study in monophagous herbivores. Annales Zoologici Fennici, 42, 363-377.