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Title: Daphnia magna origin involved in susceptibility to white bacterial disease in presence of Microcystis aeruginosa
Authors: Coopman, Marlies
Muylaert, Koenraad
Reyserhove, Lien
Decaestecker, Ellen
Issue Date: Feb-2014
Conference: Netherlands Annual Ecology Meeting location:Lunteren, The Netherlands date:11-12 February 2014
Abstract: Environmental stress often weakens hosts, resulting in synergistic effects induced by parasitism and stressful conditions. We investigated the effect of environmental stress on Daphnia parasitism by exposing Daphnia magna to the cyanobacterium Microcystis aeruginosa and a bacterial parasite that causes White Bacterial Disease. A life-table experiment was performed in which D. magna was exposed to a microcystin containing Microcystis aeruginosa strain (wild-type) and its microcystin lacking mutant (control treatment). The response differences between D. magna clones isolated from an eutrophic and an oligotrophic pool were compared. Overall, our results did not show a synergistic effect between the parasite and M. aeruginosa, but population dependent effects were present. The experiment showed that D. magna isolated from an eutrophic pond were more susceptible to the parasite in the presence of M. aeruginosa than D. magna isolated from an oligotrophic pond in terms of percentage infected D. magna and time to infection. These differences may be interpreted in the context of a remaining Microcystis tolerance characteristic, namely keeping up filtering while Microcystis is present, as Microcystis blooms are expected to be more present in eutrophic than in oligotrophic ponds. This experiment shows that the origin and history of organisms may be important in the susceptibility to parasites in stressful conditions
Publication status: published
KU Leuven publication type: IMa
Appears in Collections:Biology, Campus Kulak Kortrijk
Department of Biology - miscellaneous

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