We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Parasites driving host diversity: Incidence of disease correlated with <italic>Daphnia</italic> clonal turnover.
- Authors
Turko, Patrick; Tellenbach, Christoph; Keller, Esther; Tardent, Nadine; Keller, Barbara; Spaak, Piet; Wolinska, Justyna
- Abstract
Abstract: According to the Red Queen hypothesis, clonal diversity in asexual populations could be maintained by negative frequency‐dependant selection by coevolving parasites. If common clones are selected against and rare clones gain a concomitant advantage, we expect that clonal turnover should be faster during parasite epidemics than between them. We tested this hypothesis exploring field data of the <italic>Daphnia</italic>–<italic>Caullerya</italic> host–parasite system. The clonal make‐up and turnover of the <italic>Daphnia</italic> host population was tracked with high temporal resolution from 1998 until 2013, using first allozyme and later microsatellite markers. Significant differences in the clonal composition between random and infected subsamples of <italic>Daphnia</italic> populations were detected on six of seven tested occasions, confirming genetic specificity of the host–parasite interaction in this system. We used time series analysis to compare the rates of host clonal turnover to the incidence of parasitism, and found that <italic>Caullerya</italic> prevalence was significantly associated with microsatellite‐based clonal turnover. As alternate hypotheses, we further tested whether turnover was related to a variety of biotic, abiotic, and host demographic parameters. Other significant correlates of turnover were cyanobacterial biomass and (weakly) temperature. Overall, parasitism seems to be a strong driver of host clonal turnover, in support of the Red Queen hypothesis.
- Subjects
DAPHNIA; POPULATION genetics; HOST-parasite relationships; COEVOLUTION; PARASITES
- Publication
Evolution, 2018, Vol 72, Issue 3, p619
- ISSN
0014-3820
- Publication type
Article
- DOI
10.1111/evo.13413