Temporal and spatial variations in the parasitoid complex of the horse chestnut leafminer during its invasion of Europe

0355627 - BC 2011 RIV NL eng J - Journal Article
Grabenweger, G. - Kehrli, P. - Zweimüller, I. - Augustin, S. - Avtzis, N. - Bacher, S. - Freise, J. - Girardoz, S. - Guichard, S. - Heitland, W. - Lethmayer, Ch. - Stolz, M. - Tomov, R. - Volter, Lubomír - Kenis, M.
Temporal and spatial variations in the parasitoid complex of the horse chestnut leafminer during its invasion of Europe.
Biological Invasions. Roč. 12, č. 8 (2010), s. 2797-2813. ISSN 1387-3547. E-ISSN 1573-1464
Grant - others:Euroepan Commission and the Swiss Federal Office for Education and Science(CH) FP5; Euroepan Commission and the Swiss Federal Office for Education and Science(CH) QLK5-Ct-2000-01684
Institutional research plan: CEZ:AV0Z50070508
Keywords : parasitoid recruitment * adaptation * host residence time
Subject RIV: EH - Ecology, Behaviour
Impact factor: 3.474, year: 2010

The enemy release hypothesis posits that the initial success of invasive species depends on the scarcity and poor adaptation of native natural enemies such as predators and parasitoids. As for parasitoids, invading hosts are first attacked at low rates by a species-poor complex of mainly generalist species. Over the years parasitoid richness may increase either because the invading host continuously encounters new parasitoid species during its spread (geographic spread-hypothesis) or because local parasitoids need different periods of time to adapt to the novel host (adjustment-hypothesis). Both scenarios should result in a continuous increase of parasitoid richness over time. Our results show that the overall parasitism rate increases as a function of host residence time as well as geographic and climatic factors, altogether reflecting the historic spread of C. ohridella. However, parasitism rates of C. ohridella are still very low. Moreover the parasitoid complex lacks specialists.
Permanent Link: http://hdl.handle.net/11104/0194354